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Senior Java Developer Interview Questions

"Senior developers have years of experience in Java and have the knowledge and communication skills to mentor other developers. Companies prioritize strong technical skills and questions will focus on problem solving and critical thinking. A bachelor's degree in computer science or a related field, along with years of industry experience are standard."

5,290 senior 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()).

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