Java Senior Interview Questions

6,023 java senior interview questions shared by candidates

Round lasts for 60 mins and it contains 3 System design scenarios and we need to answer how do we handle those scenarios - 10 mins . Scenarios will be pretty much like how do you save cost for the company and how do you scale resources . Next session I had 6 questions on Object oriented design and production issues. Next session has 2 leetcode problems one is on hashmap and the other is on finding the word in matrix .
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Senior Java Developer

Interviewed at Citi

3.6
Nov 17, 2025

Round lasts for 60 mins and it contains 3 System design scenarios and we need to answer how do we handle those scenarios - 10 mins . Scenarios will be pretty much like how do you save cost for the company and how do you scale resources . Next session I had 6 questions on Object oriented design and production issues. Next session has 2 leetcode problems one is on hashmap and the other is on finding the word in matrix .

-- All bookish questions and asking example for the same. no proper practical knowledge Question: how does arraylist works internally Answer: as like array but it grows. and if the default size is reached, another block of memory been allocated. Question: Giving a final variable and modifying the value to it. Answer: it's not possible to modify the value.Even then interview asking me the ways to modify the value. All design patterns: side car, bulk head. Question : to print pattern in java 544333222211111 input will be 5 Answer : Done.
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Senior Java Developer

Interviewed at Xoriant

3.9
Nov 27, 2021

-- All bookish questions and asking example for the same. no proper practical knowledge Question: how does arraylist works internally Answer: as like array but it grows. and if the default size is reached, another block of memory been allocated. Question: Giving a final variable and modifying the value to it. Answer: it's not possible to modify the value.Even then interview asking me the ways to modify the value. All design patterns: side car, bulk head. Question : to print pattern in java 544333222211111 input will be 5 Answer : Done.

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