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Senior Java Developer Interview Questions

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5,573 senior java developer interview questions shared by candidates

1. In first round there were 3 coding question 1 Easy 2 medium level 2nd round was F2F , interview was very smooth , some time interviewer helped me a lot and explain the answer in generic way (Caching Algo, Multithreading, Collections)
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Senior Java Developer

Interviewed at Snapdeal

4.2★
Jul 20, 2021

1. In first round there were 3 coding question 1 Easy 2 medium level 2nd round was F2F , interview was very smooth , some time interviewer helped me a lot and explain the answer in generic way (Caching Algo, Multithreading, Collections)

Q. What is the purpose of the hashCode() method? Ans. The hashCode() method generates a unique integer for an object, aiding in efficient data retrieval in hash-based collections. Used in hash-based collections like HashMap and HashSet for quick data access. Returns an integer value, which is the hash code of the object. Two equal objects must have the same hash code (consistent with equals()).
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Senior Java Developer

Interviewed at CGI

3.7★
Sep 24, 2025

Q. What is the purpose of the hashCode() method? Ans. The hashCode() method generates a unique integer for an object, aiding in efficient data retrieval in hash-based collections. Used in hash-based collections like HashMap and HashSet for quick data access. Returns an integer value, which is the hash code of the object. Two equal objects must have the same hash code (consistent with equals()).

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