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Java Backend Engineer Interview Questions

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519 java backend engineer interview questions shared by candidates

JAVA basics, Springboot (Easy),Mostly situation based questions and The interviewer was friendly, helping and Asked me to write 4 programs using streams and Lambda,Write mapping using Hibernate config which i miserably failed and Yet the interviewer was approachable and Helped me write the mapping and Rejected which was a great lesson for My Learning!!
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Java Cloud Backend Engineer

Interviewed at UPS

3.4★
Jun 26, 2025

JAVA basics, Springboot (Easy),Mostly situation based questions and The interviewer was friendly, helping and Asked me to write 4 programs using streams and Lambda,Write mapping using Hibernate config which i miserably failed and Yet the interviewer was approachable and Helped me write the mapping and Rejected which was a great lesson for My Learning!!

in 1st coding round There is an array of elements and you have to print the result after removing continuous same elements. Ex -> [tom , jerry, jerry, tom] Output -> [] Ex -> [tom, jerry, jerry, tom, tom, jerry, tom] [tom jerry Jerry tom ] output-> [] [tom jerry Jerry tom jerry tom] op= [Jerry tom ] 2nd ques Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these two numbers be numbers[index1] and numbers[index2] where 1 <= index1 < index2 <= numbers.length. ex -> Input: numbers = [2,7,11,15], target = 9 Output: [1,2] Ex -> [-1, 0] target = -1 Output -> [1, 2
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Software Engineer II SDE2 Java Backend

Interviewed at HashedIn by Deloitte

4.1★
Feb 4, 2022

in 1st coding round There is an array of elements and you have to print the result after removing continuous same elements. Ex -> [tom , jerry, jerry, tom] Output -> [] Ex -> [tom, jerry, jerry, tom, tom, jerry, tom] [tom jerry Jerry tom ] output-> [] [tom jerry Jerry tom jerry tom] op= [Jerry tom ] 2nd ques Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these two numbers be numbers[index1] and numbers[index2] where 1 <= index1 < index2 <= numbers.length. ex -> Input: numbers = [2,7,11,15], target = 9 Output: [1,2] Ex -> [-1, 0] target = -1 Output -> [1, 2

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