Here are some basic and popular questions you can expect in a Hadoop developer interview:
- Differences between Hadoop and Spark?
- What are the real-time industry applications of Hadoop?
- What is the difference between Hadoop and other parallel computing systems?
- In what all modes Hadoop can be run?
- Difference between HDFS block and InputSplit.
- What is a distributed cache? What are its benefits?
- Explain NameNode, Checkpoint NameNode, and Backup Node.
- Most common input formats in Hadoop?
- Define DataNode. How does NameNode tackle DataNode failures?
- What are the core methods of a Reducer?
You can check out this blog on Hadoop Interview Questions for more frequently asked questions in an interview with simple and lucid explanations.
Also, check this video for more information:
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