Sr Java Developer Interview Questions

5,575 sr java developer interview questions shared by candidates

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()).

First round: All the basic OOPS coding problems Second Round: String problem as a greedy problem. After that Thread questions how to overcome deadlock. Third Round: Medium problem on Log pattern and process based on single
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Senior Java Software Engineer

Interviewed at Deutsche Bank

3.8
Oct 28, 2025

First round: All the basic OOPS coding problems Second Round: String problem as a greedy problem. After that Thread questions how to overcome deadlock. Third Round: Medium problem on Log pattern and process based on single

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