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6,024 java senior interview questions shared by candidates

1) Data structure used in java like ArrayLIst,LinkedList,Set,Map 2) internal working of hashmap-> interviewer is not aware hashmap improvements, he is like why hashmap is converting in Tree, this is not possible. 3) Diff between ArrayList and LinkedList 4) Diff between Controller and RestController 6) If You are not aware of completablefuture that means you are week in threading. according to interviewer. 7) Interview Asked if sudden in your microservice load is increase how you handle it 8) scenario based Question from project.
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Senior Java Developer

Interviewed at FCI CCM

4.6★
Oct 29, 2024

1) Data structure used in java like ArrayLIst,LinkedList,Set,Map 2) internal working of hashmap-> interviewer is not aware hashmap improvements, he is like why hashmap is converting in Tree, this is not possible. 3) Diff between ArrayList and LinkedList 4) Diff between Controller and RestController 6) If You are not aware of completablefuture that means you are week in threading. according to interviewer. 7) Interview Asked if sudden in your microservice load is increase how you handle it 8) scenario based Question from project.

phone screen was basically on app dev. questions on spring annotations @repository, @ service, @controller, @component etc. Maven configuration and build process. Some on java Hashset - what happens if you try to add duplicate does it update or not. onsite interview conducted by 2 people. questions on hashset implementations , sort method impl using comparable. some core java questions like runnable vs callable. write prgm to find the number of pairs of integers in the array whose sum is equal to ‘sum’. sql to write first highest salary.
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Senior Java Developer

Interviewed at Wells Fargo

3.5★
Jan 24, 2020

phone screen was basically on app dev. questions on spring annotations @repository, @ service, @controller, @component etc. Maven configuration and build process. Some on java Hashset - what happens if you try to add duplicate does it update or not. onsite interview conducted by 2 people. questions on hashset implementations , sort method impl using comparable. some core java questions like runnable vs callable. write prgm to find the number of pairs of integers in the array whose sum is equal to ‘sum’. sql to write first highest salary.

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