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2,849 fullstack developer interview questions shared by candidates

- Resolve multiple issues in the application. No codebase documentation. - Compose data and persist using localStorage. - Implement filters for a data table component. - Develop other data models based on the current models. - Develop simulation for data changing and show it in the UI (no layout defined) Only 3 hours to code.
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Fullstack Developer

Interviewed at Planhat

4.4★
Feb 24, 2023

- Resolve multiple issues in the application. No codebase documentation. - Compose data and persist using localStorage. - Implement filters for a data table component. - Develop other data models based on the current models. - Develop simulation for data changing and show it in the UI (no layout defined) Only 3 hours to code.

Given an array arr[] of integers and an integer k, your task is to find the maximum value for each contiguous subarray of size k. The output should be an array of maximum values corresponding to each contiguous subarray.
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Fullstack Developer

Interviewed at Testpress

3.9★
Jun 30, 2025

Given an array arr[] of integers and an integer k, your task is to find the maximum value for each contiguous subarray of size k. The output should be an array of maximum values corresponding to each contiguous subarray.

1. You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return -1. You may assume that you have an infinite number of each kind of coin.
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Fullstack Developer

Interviewed at Testpress

3.9★
Jun 30, 2025

1. You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return -1. You may assume that you have an infinite number of each kind of coin.

3) Explain ALL OOPS Concepts with real-world example. 4) Now CODE those examples and implement those OOPS Concept [ eg: i explain OOPs using Keyboard as an example.. Then ended up coding the class for keyboard. the followup questions were to implement abstraction, encapsulation on it. 5) Different types of inheritance 6) SQL questions 7) A lot of questions from your projects/Resume. (In depth)
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Fullstack Developer

Interviewed at Engati

3.2★
Jul 8, 2025

3) Explain ALL OOPS Concepts with real-world example. 4) Now CODE those examples and implement those OOPS Concept [ eg: i explain OOPs using Keyboard as an example.. Then ended up coding the class for keyboard. the followup questions were to implement abstraction, encapsulation on it. 5) Different types of inheritance 6) SQL questions 7) A lot of questions from your projects/Resume. (In depth)

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