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Technical Support Interview Questions

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Do You Know?

  • According to Forbes, over 63% of businesses see AI as a tool, not as a replacement for technical support. This shows that AI can’t replace technical support yet!
  • If you ask which job role is necessary for every successful organization, the answer will be “Technical Support”.

Over 73% of customers unlock their satisfaction after their technical issues are resolved.


Technical assistance is your reliable ally in this rapidly evolving IT environment, guiding you through the newest technology with ease. In the past few years, a huge spurt in demand for technical support jobs has been seen in the job market. 59,000+ technical support jobs are available on LinkedIn only in India. An average salary of over 4.7 LPA in India and $76,496 per year in the US for a Technical Support Engineer shows the current trend.

To be a part of this trend and get a job in this field, you must successfully clear the technical support interview. In this interview question blog, we have provided all the important technical support interview questions and answers you need to know to outshine and effortlessly clear the technical support interview.

This list provides 50 Technical Support interview questions categorized by difficulty level to assess a candidate’s technical support skills.

Technical Support Interview Questions for Freshers

1. What is an operating system?

An operating system (OS) is the fundamental software that controls all of the hardware resources of a computer, and gives programs a place to run. 

Important features are:

  • Resource management: It assigns memory, CPU time, and storage capacity to individual apps.
  • Interface: It is the component that connects the user and the operating system.
  • Device driver: It functions as communication between different hardware elements, such as keyboards and printers, and operating systems.
  • Security: It offers features like permission limits and user accounts for security.
  • File management: It arranges and oversees the storage device’s files and folders.

2. What is an IP address, and how is it structured?

An Internet Protocol (IP) address is a name given to each device in numerical form that is connected to a network that uses the Internet for transferring data. The main purpose of the IP address is to identify the network interface and the location of the device in the network. The structure of an IP address is shown in format. It consists of four element numbers that are separated by dots.

3. What is the purpose of DNS, and how does it work?

The Domain Name System (DNS) is a decentralized naming system for computers. It acts like a translator as it converts human-readable domain names like www.xyz.com into some IP address, like that computers use to connect with websites.

Working of DNS

Working of DNS:

  1. You enter a domain name in your browser.
  2. Your local DNS resolver asks for the IP address from the DNS server.
  3. If the DNS server can’t find the IP address associated with the domain name, it will send the same request to a different server.
  4. Once the DNS server provides the IP address, your browser connects to the website through the internet protocol.

4. What is the difference between HTTP and HTTPS?

  • Hypertext Transfer Protocol (HTTP) is a protocol that is used when we have to transmit and receive data on the Web. It can be considered an insecure connection as it is unencrypted. 
  • Hypertext Transfer Protocol Secure (HTTPS) is an advanced version of HTTP as an extra layer of protection that is added using SSL/TLS protocols. It is considered a secure connection as it is encrypted and ensures that the data transmission between clients and servers is protected.

5. How do you troubleshoot a computer that won't boot?

Following are the steps you can follow to troubleshoot a computer that won’t boot:

  • By checking the power connections
  • Make sure all the hardware devices are connected properly to the motherboard
  • By running diagnostic tests and verifying the BIOS setting

6. What is BIOS?

The Basic Input Output System (BIOS) is intended to serve as a translator and interpreter between your computer’s hardware and the operating system. When the system starts, BIOS performs a POST (Power-on Self-test) to ensure hardware compatibility, initializes hardware devices, including memory and hard drives, and finally locates the boot loader to kick-start your operating system.

7. What is cache memory, and how does it improve computer performance?

The cache memory is a small yet exceedingly fast storage component that is integrated with the processor of your computer. With this approach, the CPU can always get what it wants instantly, rather than waiting for the memory operation. With the cache memory, you won’t have to spend time searching for already existing things; it saves you a lot of time on computing.

8. What is BOOT.INI, and what is its role in the Windows operating system?

BOOT.INI, which belonged to pre-Vista Windows versions, was a text document that provided the graphic interface of a setup menu. It had a boot menu that served multiple OS options and configured the boot loader program. The original BOOT.INI was replaced by Boot Configuration Data (BCD) in Windows Vista for security enhancement, more ability as well as compatibility with advanced versions of Windows.

9. What are some of the ports available on a computer?

Follow are the different ports in a computer system:

Essential Ports

Essential Ports:

  • USB (Universal Serial Bus)
  • HDMI (High-Definition Multimedia Interface)
  • DisplayPort

Network and Communication Ports:

  • Ethernet Port
  • Wireless Networking Card (Built-in or via USB)
  • Less Common Ports (depending on the computer)
  • VGA (Video Graphics Array)
  • DVI (Digital Video Interface)
  • SD Card Reader
  • Headphone Jack
  • Microphone Jack

10. What are the essential components required to establish a basic home network?

The following are the essential components required to establish a basic home network:

  • Router/Hub
  • LAN cards
  • LAN cables

11. How do you check a slow internet connection?

Following are the steps you can take to diagnose a slow internet connection:

  • Check the cables and links 
  • Restart networking devices 
  • Test internet speed using online speed checkers 
  • Analyze network traffic using network monitoring tools 
  • Check for routing updates on modems and routers

12. What are the steps you will take to check for software updates on a Windows operating system?

Given below are the steps you can follow:

  • First, go to the Start menu and click on Settings.


  • In Settings, you will find the Update & Security option. Click on the Windows Update option.

update and security

  • Click on the Check for updates option to search for available updates.

check for updates

  • If updates are found, click on the Download and Install button to install them.

13. Briefly explain the difference between RAM and ROM.

RAM (Random Access Memory):

  • Volatile memory – loses data when the computer turns off
  • Used for storing temporary data programs
  • More RAM generally leads to faster performance.
  • Issues: Insufficient RAM can cause slowdowns, freezing, or program crashes

ROM (Read-Only Memory):

  • Non-volatile memory – Data persists even when the computer is off
  • Stores essential startup instructions (BIOS) and device firmware
  • Not meant for user data or programs
  • Issues: Faulty ROM can lead to boot problems or system instability (rare)

14. What are the key differences between Windows and macOS operating systems?

Here’s a breakdown of key differences between Windows and macOS:

Aspects Windows macOS
Interface Windows offers a more tailored interface, whether it is through diverse layouts or customizable options. macOS is interface-oriented to be faster and more efficient.
Software Availability Windows is much more focused on open-source software. macOS targets Apple’s programs and the combination of Apple’s other gadgets
Security Windows is less secure because of its compatibility with all the free-licensed programs. macOS is more secure.
Cost Windows typically comes pre-installed on a wider range of computers. macOS is exclusive to Apple devices.

15. Explain the difference between a wired and a wireless network connection.

Wired Network:

  • Connects cables to the router/modem using Ethernet
  • Maintains steady and consistent connection speeds
  • Has no possibility of interference or signal fluctuations
  • Short cable – reduces the flexibility of the device to place it where needed

Wireless Network:

  • It uses radio waves for communication between the router/modem.
  • It allows a variety of devices to move around within the network range.
  • Connection speed can be affected by distance, interference, and network congestion as well.
  • Security vulnerabilities are more likely to be exploited in wireless connections compared to wired connections.

Technical Support Interview Questions for Intermediate

16. What are the components of a typical desktop computer system (hardware)?

A typical desktop computer consists of the following key components:


  • Central Processing Unit (CPU): The CPU is considered the brain of the computer because it sends all the important instructions to every other component in the machine.
  • Random Access Memory (RAM): It is the temporary memory that stores data while programs run.
  • Storage Device (Hard Disk Drive): All the information available on the computer is stored on the storage device. It stores the data permanently.
  • Motherboard: The motherboard is responsible for communicating information to every part of the system. It connects all other components to ensure that the data is communicated between them.
  • Video Card: The video card is responsible for displaying high-quality graphics or visuals as an output on the screen.
  • Power Supply Unit (PSU): It provides the power supply to the system, and sometimes when power is not available, it provides power backup as well.
  • Input Devices: It is the medium through which a user gives commands to the CPU. It can be done with a keyboard, mouse, etc.
  • Output Device: It is the medium through which the system gives a response to the received input. It can be a monitor, printer, etc.

17. Briefly describe the components of a central processing unit (CPU) and their functions. (Understanding CPU architecture and functionality)

The central processing unit (CPU), often called the brain of the computer, is made up of several key components, each playing a crucial role in processing the information:


  • Control Unit (CU): The CU gets commands from memory, decodes them, and points at the other CPU components to achieve those commands in a way to actualize them.
  • Arithmetic Logic Unit (ALU): The ALU is responsible for the whole completion of the arithmetic as well as logical operations that the computer needs. It is where operators perform operations, like addition, subtraction, and comparisons.
  • Registers: These memories are high-speed storage compartments that store the data and instructions that the arithmetic and logic bytes are processing. They help you have easy access to critical matters during the execution phase.
  • Cache: The cache, working as a superfast memory buffer between CPU and main memory (RAM), multiplies the speed of access to data needed immediately. It stores common data, which is used by the CPU, and also the instruction; hence, the CPU can fetch greater amounts of data in less time from these memories instead of RAMs.

18. What is the difference between a program and an application? (Basic software terminology)

Below, we have provided the difference between a program and an application:

Feature Program Application (App)
Definition It is a set of commands that is used by a computer to complete a task in particular. It is a program that is specifically created for a task, and it usually has a user interface for interacting with it.
Scope It can be used alone or be a part of an application. Mostly used alone, but sometimes used with large software
Focus Underlying code or logic User-friendly interface for specific tasks
Examples Mathematical formulas, algorithms Web browser, game, calculator app
Relationship All programs are not applications. All applications are programs.

19. Explain the difference between a compiler and an interpreter in software development. (Understanding programming language concepts)

In the table given below, we have provided the difference between a compiler and an interpreter:

Aspects Compiler Interpreter
Function Translates complete program code into machine code before execution It executes the code line by line. 
Output Create a single executable file (machine code) No individual output file is generated.
Speed Due to pre-translation, it makes programs run faster.  Due to on-the-fly translation, programs run slower.
Efficiency Compiled code is optimized for the target machine’s architecture. May require more resources for runtime translation.
Error Detection Not only Identifies errors but also rectifies them until they get fixed It Identifies errors only during the execution
Debugging Debugging is complex. Debugging is easy.
Portability Portability is restricted due to varying architectures. More portable as it relies on a runtime interpreter present on the target system.
Examples C, C++, Java Python, JavaScript, Ruby

20. What is the difference between a public IP address and a private IP address? (Intermediate networking concepts)

We have two main types of IP addresses: public IP and private IP. Below is a table outlining their key differences:

Aspects Public IP Address Private IP Address
Definition A public IP address is the unique IP address that is assigned by the internet service provider to your network router. A private IP address is one that is assigned to your devices within your private network (like your home or office).
Scope Global Local
Access Accessible from the internet Not directly accessible from the internet
Control Assigned by your internet service provider Assigned by your router
Use Case Connect to the internet Connect devices on your network

21. What is the difference between open-source and closed-source software? (Understanding software licensing models)

Below is the difference between open-source and closed-source software:

Feature Open-Source Software Closed-Source Software
Source Code It is free for everyone and can be easily accessed. It is not available for everyone. The source code is protected by the developer.
Development It is developed by a community. It is developed by a single company or organization.
Cost Often free or offered at a lower cost It is paid software and requires a license fee.
Customization It is highly customizable. Customization is limited as it is controlled by the developer.
Security It is less secure as it can be accessed by anyone. It is considered to be more secure.
Examples Linux operating system, LibreOffice suite Microsoft Office suite, Adobe Photoshop, macOS

22. Briefly explain the concept of virtual machines and their advantages. (Understanding virtualization technology)

Virtualization technology, based on the virtual machines (VMs) concept, allows a single physical computer to emulate several independent computing environments. Such VMs emulate full-size physical computers with their own virtual processors, memory, storage, and operating systems as part of the software rather than hardware.

Some of the advantages of virtual machines are mentioned below:

  • Resource Optimization: Virtual machines help enhance the effective use of resources. 
  • Isolation and Security: In each VM, there is the element of isolation, and that is the reason it can be said to be a sandboxing space for running operating systems (OS). This type of isolation serves its conflict prevention purposes between applications and contributes to system protection by mitigating the impacts of either malware or errors within a single VM.
  • Flexibility and Scalability: VMs enable multi-purpose opportunities across different functionalities. Hardware virtualization can be leveraged by developers to create specific tests for each project, and IT professionals can run and manage multiple applications executed across VMs for greater scalability and fault tolerance.
  • Simplified Disaster Recovery: In the case of a system malfunction, VMs can easily be recovered from the backups, thus facilitating data recovery and minimizing downtime.

23. Why is data backup important, and what are some common backup methods? (Data backup and recovery best practices)

Data backup is an essential measure that you have to take in order to keep your precious information safe from unintentional incidents. Try and imagine what would happen if you lost all your pictures, documents, or work files for some reason like a hard disk crash, an accidental deletion, or if you were attacked by malware viruses. Data backup will guarantee a copy of your most significant files, so you will not miss any of them in case it happens.

Here’s why data backup is so important:

  • Data Loss Prevention: Hardware failure, malfunctions of software, or simple human error can all bring about the loss of data. Backups do the same job, ensuring you don’t regret data deletion.
  • Disaster Recovery: Adverse events such as fire, water damage, or burglary can immediately destroy not only a computer but also the information in it. 
  • Peace of Mind: You don’t have to worry about your data being safe when you know it is secure. 

Now, let’s explore some common backup methods:

  • External hard drives are the best practice that will enable offline backups to be very low-cost. 
  • Cloud storage can provide backup facilities that are both remote and accessible.
  • Network Attached Storage (NAS) devices provide an economical and safe option for businesses with huge data sets or users dealing with volumes of extensive data.

24. A user's external hard drive is not recognized by their computer. What are some possible causes and troubleshooting steps? (Troubleshooting external storage device issues)

Some of the possible reasons for the external driver not being recognized by the computer are:

  • Check the connection: Check whether the hard drive cable is connected properly. Try at different ports, if possible.
  • Restart your computer: The best solution for any problem is to restart the computer.
  • Explore Settings: Try to find the “Disks” or “Storage” section in the settings to see if your external drive shows up there.
  • Driver Issue: If you are still not able to see the hard drive, there might be an issue with the hard drive.

25. How would you fix the issue if the audio on your computer stopped working or if there was no sound coming from it? (Audio Troubleshooting skills)

Following are the steps you can follow to fix the audio issue on your computer:

  • Check whether the volume button is not on mute
  • Make sure all the connections are working perfectly
  • Ensure that the speakers have power
  • Restart the computer if you are still having problems
  • Still facing issues, you can search for sound drivers in the settings, and check their working status

26. What is the ‘Blue Screen of Death,’ and how would you fix it? (System Troubleshooting skills)

The Blue Screen of Death (BSOD) is a situation when your system starts showing a blue background with the instruction on the screen, “Your PC ran into a problem.” It is done by the system to protect it from a bigger problem. It can occur due to faulty hardware or outdated software. It can be easily fixed in most of the cases.

Blue Screen of Death

Below are the steps to fix this issue:

  • The simplest way to fix this issue is by restarting the computer.
  • Check for system and software updates and fix them.
  • Run an antivirus program, as this issue can occur due to malware
  • Uninstall recently installed software
  • If still facing the issue, reinstall Windows.

27. Briefly describe the boot process of a computer. (Understanding system startup procedures)

The boot process of a computer system consists of the following steps:

  • Power On Self-Test (POST): When we turn on the computer system, the first process that takes place is Power On Self-Test. It is the self-check process in which the system verifies that all the essential hardware is functioning properly. 
  • BIOS/UEFI: In the next step, BIOS (Basic Input/Output System) or UEFI (Unified Extensible Firmware Interface) comes into play to locate the operating system.
  • Loading the Operating System: Once BIOS/UEFI finds the OS files, it loads them into memory.
  • Desktop and Applications: In the end, the operating system loads the GUI (graphical user interface) that allows the user to launch applications.

28. What is the difference between a router and a modem? (Understanding network hardware components)

Below are some of the common differences between a router and a modem:

Aspects Router Modem
Function A router manages data flow within a private network. A modem connects that private network to the internet service provider.
Connectivity It can connect multiple devices. It is connected only to an Internet provider through a cable or phone line.
Signal Processing It distributes the internet signals to different IP addresses or devices. It converts wave signals to transmission data for the device.
Security Features It includes firewalls for protection. Lacks security features
Additional Features Parental controls, Quest network options, bandwidth management, etc. May have basic status lights for connection information.

29. A user's computer is infected with malware. What steps would you take to identify and remove the malware? (Malware identification and removal procedures)

Following is the step-by-step approach to identifying and removing malware:

  1. Isolating the Threat: I will ask the user to disconnect the computer from any network connections to avoid spreading malware infections to other devices.
  2. System Scan: Then, I will run the in-built updated antivirus to find the malicious software.
  3. Safe Mode Scan: If the initial scan fails, I will take an advanced step by rebooting the system in Safe Mode and scanning again. 
  4. Manual Removal: After identifying the malicious files, I manually remove the infected files. 
  5. System Cleanup:  I will clean all the temporary files using the trusted system cleanup tool.
  6. Software Update: I will make sure that the operating system is up-to-date. I also update all the applications to their latest versions.
  7. Password Reset: I will advise the user to change his/her important passwords (email, online accounts) available in the system as a precaution.

30. What are the possible causes and troubleshooting steps you will take if a user is facing an online video streaming buffer issue? (Troubleshooting video streaming issues)

Some of the potential causes of video buffering are:

  • A slow internet connection can be one of the most common reasons.
  • If you are connected to too many devices using the internet simultaneously, it can buffer your video.
  • There might be an issue with your Wi-Fi connection or signal strength.
  • Sometimes watching videos at peak hours with high-traffic or busy servers can be a reason.
  • Using outdated software

Some of the common troubleshooting steps are:

  • Speed Test: Check the speed of the internet by running a speed test. If it is slow, contact the service provider.
  • Network Check: Reduce the number of applications running in the background. 
  • Wired Connection: Always try to connect your device with a wired connection like a LAN cable.
  • Restart App/Device: Restart your router or modem; it can also fix the issue.
  • Software Updates:  Keep your application updated, as using outdated apps can also create buffering.

31. What are some general steps you could take to diagnose and resolve the issue of a slow-running computer? (Basic troubleshooting techniques for system performance)

Here are some general steps to diagnose a slow computer:

  • Identify Resource Usage: Observe if the CPU, memory, and disk usage are spiked high in the correct order. Overloading can cause the system to slow with time.
  • Close Unnecessary Programs: If you have too many programs running in the background on your computer, close all the programs and browser tabs.
  • Check for Malware: Next, run a thorough scan with an antivirus or antimalware program to identify and eliminate malware.
  • Disable Startup Programs: Disable all unnecessary programs and features that are auto-started during the system start-up.
  • Disk Cleanup: Delete all the temporary files that accumulate with time and occupy space on the storage device with the help of a disk cleanup application.

32. A user reports an error message

Here’s how I would troubleshoot a “404 Not Found” error:


  • Gather Information: Inquire the user by asking them for the exact link they were trying to access. 
  • Check for Typos: Make sure that the spelling of the URL is correct, there are no excess characters and all the required characters are there. 
  • Verify the Link: Verify the URL on the site map or by locating the page in the website search function.
  • Clear Cache: Teach the user to clean the browser cache and cookies.
  • Contact Website Owner: If the page doesn’t load after the above command, advise the user to inform or contact the website owner about the broken link.

33. Describe the function of a firewall in network security. (Basics of network security)

A firewall is computer security software or system that monitors and manages the data that goes in and out of the network, complying with established security rules.

Security Private LAN

The main functions of a firewall in network security are

  • Traffic Filtering: The firewall examines every data packet in detail to allow only the safe ones that adhere to the security guidelines to pass through it. Thus, the security component of the network will be kept away from illegal intrusions.
  • Access Control: Network administrators can manage these firewall security rules within the firewall. With these adjustments, it will allow only authorized networks and block all unauthorized networks.
  • Threat Protection: Firewalls can be considered one of the most critical control barriers against a myriad of cyberattacks. They provide an effective defense mechanism by stopping malicious activities from entering through unauthorized browser intrusions.

34. What is a VPN, and how does it enhance online privacy and security? (Understanding privacy and security concepts)

A Virtual Private Network (VPN) creates a secure channel for your internet traffic instead of an unsecured one. It sends your data to the VPN service provider‘s remote server, which encrypts it and passes it through. This offers several advantages for online privacy and security: 

How VPN Works

  • Enhanced Privacy: A VPN works by scrambling your data, which makes it unintelligible to anyone who might be spying on you when you are connected to a public Wi-Fi network. This minimizes the risk of revealing passwords, financial data, or browsing activity, which can be valuable information for criminals.
  • Masked Location: A VPN hides your real IP address by substituting it with the IP address of the VPN server, hence, suggesting that you are connecting from there. It effectively hides your browsing history, making online tracking impossible, and unblocks websites or contents restricted for specific regions.
  • Increased Security: This encryption will add to the security that the VPN offers by making sure that your network traffic is shielded. This thwarts the actions of hackers and malicious actors who would otherwise attempt to steal your information or impose on your online activities.

35. Explain the concept of data encryption and its importance in cybersecurity. (Understanding the concept of data encryption)

In simple terms, data encryption is the process of converting simple readable data into unreadable data by using a specific algorithm. It is done to protect the data from unauthorized access. 

Importance of encryption in cybersecurity:

  • Confidentiality: By using an encryption algorithm, only the users who have access will be able to access information, ensuring the security of sensitive data.
  • Data Integrity: Encryption protects data from being modified during transmission or storage.
  • Compliance: Encryption is one of the security control mechanisms applied to meet data privacy regulations.

Technical Support Interview Questions for Experienced

36. How would you troubleshoot an issue related to email sending and receiving? (Basic email troubleshooting)

  • First, check whether the internet connection is stable or not.
  • Ensure that the username and password of the email account are entered correctly. 
  • Do a quick scan of your email client or webmail for error codes or alert notifications.
  • Check whether sufficient storage is available to store email data to prevent the risk of emails getting deleted.
  • Try to send a test mail from a different device using the same email client to check the source of the problem.

37. What is the basic information you need to gather from a user who is having trouble installing a new software program? (Understanding software installation processes and potential problems)

Following is some of the information needed to effectively assist with software installation issues:

  • Operating System: Check the operating system of the user, as different OSs have different installation processes.
  • Software Name: Ask for the software name and its version to help the user get the correct installation guide. 
  • Error Messages: Receiving an error message during installation is also a clue about the problem, which may help the user figure out the issue.
  • Downloaded Source: Knowing the download source of the software can help detect possible malware problems.
  • Previous Attempts: Knowing the past installation issues and the probable troubleshooting steps can be fruitful. 

38. What are some initial troubleshooting steps you could recommend to the user whose printer is not functioning properly? (Basic printer troubleshooting)

Here are some initial troubleshooting steps for a non-functioning printer:

  • Power and Connection: The first step is to check for power and other connections and whether they are connected properly. 
  • Check Paper and Ink: Check that the paper tray is loaded with sufficient numbers of papers. Also, check the ink slot for the availability of ink or toner.
  • Print Test Page: Run a test print to check out the printer first.
  • Update Drivers: Check whether the drivers are updated; if not, update them for the official website.
  • Reinstall Drivers: Reinstall the drivers for smooth working, as sometimes malfunctioning drivers get fixed when they are reinstalled.
  • Restart Devices: If nothing works, power off and unplug the printer and computer.

39. What are some possible causes and troubleshooting steps you will take when a user’s phone is not charging? (Basic mobile device troubleshooting)

  • Check for physical damage or dirt with the charging cable and adapter to see the possibility of a charger malfunctioning. 
  • Clear the phone’s charging port with a soft brush or compressed air, which eliminates debris or lint.
  • Try to charge a different device with the same charger to check the working status of the charger. 
  • Restart the phone if some software issue is affecting the charging procedure.
  • If the phone fails to charge using the wall outlet, try using a different power source.

40. How would you guide a user through troubleshooting steps who is facing an internet connection issue? (Basic internet connectivity troubleshooting)

Follow the steps given below to guide a user who is facing internet connectivity issues:


  • Verify Connection: First, verify the connection, whether it is wired or wireless. It will help you provide instructions accordingly.
  • Restart Devices: In most cases, problems get resolved only after restarting the devices. Ask the user to restart the router or system.
  • Check Connections: Make sure that all the connections are plugged in properly.
  • Signal Strength: If the user is using a wireless connection, ask them to check their signal strength.
  • Contact Service Provider: Still facing the issue, contact the internet service provider.

41. What are some potential causes and troubleshooting steps you will take when a user's web browser is constantly crashing? (Intermediate browser troubleshooting)

Some of the potential causes of browsers crashing constantly are: 

  • The browser used by the user might be outdated. 
  • Conflicting extensions can also be the reason.
  • The corrupted cache stored might be broken.
  • Too many tabs open simultaneously or working on heavy websites that use more memory.
  • There might be a possibility of Malware Infection.

Some of the common troubleshooting steps you can follow are:

  • Always keep your browser up-to-date and keep checking for new updates
  • Try to disable all the extensions, and then restart your browser again
  • Clear all your cache and cookies, and check again
  • One of the best solutions is to restart your computer and start your browser again
  • Run the in-built anti-malware scan to check for any possibility of malicious interference.
  • Check your browser settings and go with the default settings

42. A user's computer is overheating. What are some possible causes and troubleshooting steps? (Troubleshooting computer overheating issues)

Some of the possible causes of computers getting overheated are:

overheating issue

  • Dust accumulation can be one of the reasons for the overheating of the computer
  • Sometimes faulty cooling fan can also create overheating
  • Running too many applications at a time creates overheating problems
  • Computer systems require proper ventilation, poor ventilation can create overheating

Some of the possible troubleshooting steps to check for computer overheating are:

  • Cleaning and Ventilation: Switch off and remove the power plug. Carefully clear all the dust accumulated in the vents. Make sure that you have good ventilation around the computer that will help pass the air.
  • Fan Functionality Check: Check whether the fan is working properly; if not, then change the malfunctioning fan.
  • Temperature Monitoring: With the help of software, try to monitor the temperature of the system by measuring the CPU and GPU heat. 
  • Thermal Paste Replacement (Advanced): You may be able to improve the corresponding heat transfer by replacing the thermal paste. But please always seek the guidance of an expert when you don’t know how to replace it.

43. How would you handle a customer who is frustrated or upset with a technical issue? (Customer service skills and de-escalation techniques)

customer handling

  • Firstly, don’t panic and keep calm while dealing with these situations.
  • Try to listen to the customer’s concerns carefully and start working on the problem.
  • Collect all the information related to the problem and divide the problem into small tasks.
  • Start solving the issues one by one and keep updating the customer about the issue.
  • If required, get help from your senior member and try to fix the problem.
  • If the problem is resolved, apologize to the customer and assure them of regular updates.

44. What is the difference between TCP and UDP protocols? When would you use each one? (Understanding network communication protocols)

Transmission Control Protocol (TCP) is a connection-oriented protocol used to transfer data securely by creating a virtual connection. On the other hand, User Datagram Protocol (UDP) is a connectionless protocol that is used to share data more quickly. Below, we have provided the difference between TCP and UDP in tabular form.


Feature TCP (Transmission Control Protocol) UDP (User Datagram Protocol)
Connection Type Connection-oriented Connectionless
Analogy More reliable for data delivery More focus on speed
Error Correction Yes, it assures data delivery No, data delivery is not guaranteed
Ordering Follow the sequence of the order Transfer data without any sequence
Speed Slower compared to UDP Faster compared to TCP
Applications File transfer (FTP), web browsing (HTTP), email (SMTP) Streaming media (video/audio), online gaming, DNS lookups

45. As an IT support employee you have to troubleshoot an IT issue related to a company network that is running slow. What are the procedures which will help you detect the problem you are explaining. (Troubleshooting network performance issues)

Slow internet connection inhibits the working process, Here are some things you can do to fix sluggishness:

  • Gather Intel: Collect reports from users on the slowness it provides, duration of the issue, which apps were affected, possible patterns. Use network monitoring tools to access the data.
  • Check the Basics: Check how much of your internet access you have subscribed and how much you actually use. Get aware of peak and sub-peak moments and possible reason. Verify the programs and software involved for infection from malware.
  • Targeted Investigation: Use tools for network to find packets of high traffics. Create a comprehensive scan of the performance of your networking equipment for symptoms of overloading. Check how strong Wi-Fi signals are and the range of the coverage.
  • Prioritize Solutions: Consider upgrading of the internet plan; use technology that allowed for trafiic shaping to give priority to important applications
  • Action Plan: Try network configuration or hardware upgrade such as flow optimisation or resolving bottleneck issues, as examples.

46. What are the steps you should take to secure a home network? (Understanding network security best practices)

Following are the steps you should take to secure your home network to protect your devices and data:

  • Strong Passwords and Encryption: It is always recommended creating a password that is very hard to crack as well as unique. Use WPA2 encryption on your Wi-Fi network.
  • Network Access Control: You should try to make a separate network for the guest users and limit the MAC addresses on your network.
  • Software Updates and Security Measures: You should always keep your system software updated so that it will help you protect from the latest malware. You must enable your firewall and antivirus software.
  • Be Wary of Phishing Attacks: You should ignore and avoid the suspicious link like push mail or do not need to use the links through the messages also.
  • Physical Security: Place your router where it is physically safe to avoid physical tempering. 

47. What are some advantages and disadvantages of using cloud storage solutions? (Understanding cloud computing concepts)

Besides other features like scalability without limits, there is always a drawback, such as the online storage system. Here’s a breakdown of the key advantages and disadvantages to consider:

Cloud Computing

Advantages of using cloud storage:

  • Accessibility: Whether you work remotely or use multiple devices, you get access to your data as long as there is the internet.
  • Scalability: Having a flexible storage space will make a difference; no more storage device management is required.
  • Cost-Effectiveness: It is more cost-efficient to use cloud storage instead of buying and keeping physical storage equipment. 
  • Disaster Recovery: Cloud storage helps create insurance so that in case your local storage is damaged due to hardware failures or some other hazard, you can safely keep your data away.
  • Collaboration: It became so easy to send files and folders to others, whether team members or friends.

Disadvantages of using cloud storage:

  • Security Concerns: Data kept in the cloud depends on security steps taken by the provider. 
  • Potential Costs: This choice may seem budget-friendly at first glance, but if you store a huge amount of data and frequently transfer the files, the cheap option could expand into a pricey option over time.
  • Vendor Lock-in: Shifting from one current cloud storage provider to another can actually be exhaustive since gathering and moving large amounts of data can be time-consuming.
  • Limited Control: Giving up some control of data is a necessary price one has to pay when using cloud storage.

48. A user's database is corrupt, and they need to recover lost data. What are some recovery options you could suggest? (Data recovery techniques)

Follow the given steps to recover lost data when your database gets corrupted.

  • Backup is Your Best Friend: Make sure that there is a recent database backup. Simply restore it in the early stages to reach the fastest recovery process with little data loss.
  • Built-in Repair Tools: With no backups at hand, see if the database software provides repair options. 
  • Data Recovery Software: If the built-in tools fail, try data recovery software. However, many of those specialized software might be hard to use.
  • Professional Help: Apart from that, always develop a list of backups, and if all else is not working, try the pro data recovery services on critical info. 
  • Stop Using the Database: Immediately ask the user to stop using the database so that there will be no more data loss and corruption.

49. Explain the concept of subnetting and its role in network management. (Understanding advanced network configuration concepts)

  • Dividing the Network: From a single large network, subnetting divides it into small subnetworks with their unique address range.
  • Efficient use of IP Addresses: Subnetting allows efficient use of IP addresses and prevents everyone in a big network from having the same key. 
  • Security Enhancement: Subnetting separates out networks using boundaries. This action actually separates traffic, problems, and any other threats within a subnetwork
  • Improved Performance: Subnetting achieves this by splitting the network into smaller segments, thus leading to uncongested online traffic.
  • Scalability: The subnetting enables network expansion. There is no need to start from scratch with the creation of new subnets within the nested existing infrastructure system

50. A user's email server is not sending or receiving emails. How would you troubleshoot this issue? (Troubleshooting email server problems)

Below are some of the steps you can take to troubleshoot this issue.

  • Check the Basics: Make sure the Internet line is working properly and verify the email client configuration, like email server settings, usernames, and passwords.
  • Investigate the Server: Inquire about the status of the email server’s functioning, whether it is normally off or under the maintenance process, and see if the server is able to work with SMTP (sending) and POP/IMAP (receiving) services.
  • Review Firewall/Antivirus: Do some checks on firewall configurations to make sure that email ports are not closed. During the activation process, disable the antivirus temporarily to check the cause of the interference.
  • Look for Error Messages: Check the error messages that the email client could display. It can highlight the problem (for example, you can’t log in or there is a problem with the server connection).
  • Advanced Troubleshooting: For technical users ready to take security on, validate their MX records (a route for email delivery) using online tools. For example, having the wrong DNS records can prevent emails from arriving.


We hope these technical support interview questions and answers will help you prepare for your interviews. All the best!

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About the Author

Techical Research Analyst - Front End Development

As a Technical Research Analyst, Kislaya specializes in Front End Development. He is a Full Stack Developer, known for crafting scalable architectures and user-centric interfaces. He has a massive international client base and is an expert in cloud computing, Linux, and Java Script, personifying a commitment to quality and information sharing.