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Java Full Stack Developer Interview Questions

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1,048 java full stack developer interview questions shared by candidates

Angular ------- 1. Pass data between components 2. Pass data if there is no relation between components 3. how to get the query string in component 4. RxJs in Angular 5. how you implement unsubscribe method in observable Java --- 1. Feature used in Java 8? 2. Completable Future? Spring Boot ------------ 1. Connect two dbs & use one instance at runtime 2. if there is 3 service with 3 DB & if one goes down, how to rollback the operation
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Full Stack Angular and Java Springboot Developer

Interviewed at Cognizant

3.6★
Oct 7, 2024

Angular ------- 1. Pass data between components 2. Pass data if there is no relation between components 3. how to get the query string in component 4. RxJs in Angular 5. how you implement unsubscribe method in observable Java --- 1. Feature used in Java 8? 2. Completable Future? Spring Boot ------------ 1. Connect two dbs & use one instance at runtime 2. if there is 3 service with 3 DB & if one goes down, how to rollback the operation

Very Buzzwordy interview. Finalised keyword in java, autoboxing vs unboxing, one to many vs many to one in java, Constructor chaining, stream writing with constraints, what is difference between collection and streams in java. Association and aggregation. These are just some i couldn't answer well, rest i could, there were like 30 topics overall. How data is transferred from child to parent in angular without using ngrx/state management.
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Java Full Stack Consultant

Interviewed at Deloitte

3.8★
Feb 18, 2026

Very Buzzwordy interview. Finalised keyword in java, autoboxing vs unboxing, one to many vs many to one in java, Constructor chaining, stream writing with constraints, what is difference between collection and streams in java. Association and aggregation. These are just some i couldn't answer well, rest i could, there were like 30 topics overall. How data is transferred from child to parent in angular without using ngrx/state management.

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