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Technical Lead Java Interview Questions

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30,885 technical lead java 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.

Wanted me to make a spring app to mask inputs, and an 'elegant' login in screen that was responsive with a few different rules/patterns applied to the inputs. After hosting both on my website, and seeing they didn't even look, they claimed my login screen wasn't elegant enough, because you know, username and password isn't industry standard
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Java Web Developer

Interviewed at Deloitte

3.8★
Sep 28, 2017

Wanted me to make a spring app to mask inputs, and an 'elegant' login in screen that was responsive with a few different rules/patterns applied to the inputs. After hosting both on my website, and seeing they didn't even look, they claimed my login screen wasn't elegant enough, because you know, username and password isn't industry standard

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