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2,857 fullstack developer interview questions shared by candidates

- write code to upload large file of 1 GB - write code to unit test custom hook in react - code to demonstrate libraries you worked on. like kue.js, Sequelise DB connection, Error boundary in react, Unit tests - Some output oriented JS questions.
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Fullstack Developer

Interviewed at EPAM Systems

4★
Jun 21, 2025

- write code to upload large file of 1 GB - write code to unit test custom hook in react - code to demonstrate libraries you worked on. like kue.js, Sequelise DB connection, Error boundary in react, Unit tests - Some output oriented JS questions.

1. Streams in Java 2. Difference btw PUT/POST methods 3. DB queries to Join and GroupBy 4. What do you mean by Single page application? 5. What all services are used in the project and how they communicated among themselves?
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Fullstack Developer

Interviewed at Deloitte

3.8★
May 23, 2022

1. Streams in Java 2. Difference btw PUT/POST methods 3. DB queries to Join and GroupBy 4. What do you mean by Single page application? 5. What all services are used in the project and how they communicated among themselves?

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