Interview preparationFree sample inside

Backend Developer Interview Questions and Answers

Backend interviews focus on how servers, databases and APIs work together. Here are common questions with short answers.

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Sample questions and answers

What is middleware?

Sample answer

Middleware is code that runs between a request and the final handler. It is used for things like logging, authentication and validation.

What is a database index?

Sample answer

An index is a data structure that speeds up reads on selected columns, at the cost of extra storage and slower writes.

What is the difference between authentication and authorization?

Sample answer

Authentication verifies who you are. Authorization decides what you are allowed to do.

What is inside the full eBook

The free answers above are only a small sample.

✓Interview questions and answers

✓Hiring companies and interview rounds

✓Salary range

✓Resume templates for freshers and experienced candidates

✓Roadmap and important topics

✓Books and YouTube channels to learn from

Back-end Interview Q&A Top 250

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Frequently asked questions

What do backend interviews test?

APIs, databases and SQL, authentication, caching, error handling and often basic system design.

Which language is best for backend jobs?

Java, Python, Node.js and Go are common choices. Interviewers care more about fundamentals than the specific language.

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