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Java Full Stack Developer Interview Questions

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1,052 java full stack developer interview questions shared by candidates

Most of the questions were based on core Java concepts i.e Inheritance, Abstraction, Encapsulation and Polymorphism. One or two questions were on DSA. Those questions were based on simple array manipulation and tree. In the question on tree, the interviewer added new points and I had to change the code according to that. But, all the interviewers were helpful. One or two questions were also on my projects.
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Full Stack Engineer (Java)

Interviewed at Whatfix

3.4★
Jan 2, 2019

Most of the questions were based on core Java concepts i.e Inheritance, Abstraction, Encapsulation and Polymorphism. One or two questions were on DSA. Those questions were based on simple array manipulation and tree. In the question on tree, the interviewer added new points and I had to change the code according to that. But, all the interviewers were helpful. One or two questions were also on my projects.

Consisted 4 rounds 1st round on paper consisted mcqs and theory question and a coding question 2nd round 3 Sql queries 3 rd round face to face interview regarding concepts of java, oops 4 th round on Springboot task based and theoretical questioning of each command
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Full Stack Java Developer

Interviewed at Inspiron Labs

3.8★
Nov 15, 2025

Consisted 4 rounds 1st round on paper consisted mcqs and theory question and a coding question 2nd round 3 Sql queries 3 rd round face to face interview regarding concepts of java, oops 4 th round on Springboot task based and theoretical questioning of each command

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