This is the mandatory question asked in almost every interview. In a Salesforce interview, choose the project that took pride in developing and explain with confidence. Start with the problem statement and explain the process of how you developed the solution. Also, explain some of the obstacles you faced and how you solved them.
If you are preparing for an interview, I would recommend this Salesforce Interview Questions blog for most frequently asked questions in Salesforce interviews.
Also, you can watch this video on Salesforce Interview Questions: