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Junior Frontend Developer Interview Questions

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10,729 junior frontend developer interview questions shared by candidates

1 .Find the subarrays with given sum? (Initially, I solved it with O(n^3) time complexity and after that I reduced it to O(n^2). 2. Promises 3. Closures 4. Hoisting 5. Box Model and Box Sizing 6. Position Property in CSS 7. ES6 Features 8. Regular Function and Arrow Functions
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Frontend Developer

Interviewed at Paytm

3.2★
Jun 5, 2021

1 .Find the subarrays with given sum? (Initially, I solved it with O(n^3) time complexity and after that I reduced it to O(n^2). 2. Promises 3. Closures 4. Hoisting 5. Box Model and Box Sizing 6. Position Property in CSS 7. ES6 Features 8. Regular Function and Arrow Functions

No focus on technical implementation (like syntax javaScript/ TypeScript or Algorithm) at all, but its up to you to explain what you did in your previous experiences, which is unique and very nice way to get to know a candidate (Kudos). Later on were more questions regarding design system, AI adoption and trade-offs between implementations.
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Senior Frontend Engineer

Interviewed at Magnolia International

4.2★
Sep 30, 2025

No focus on technical implementation (like syntax javaScript/ TypeScript or Algorithm) at all, but its up to you to explain what you did in your previous experiences, which is unique and very nice way to get to know a candidate (Kudos). Later on were more questions regarding design system, AI adoption and trade-offs between implementations.

The N-Queens problem is a classic algorithmic challenge that involves placing N chess queens on an N×N chessboard so that no two queens threaten each other. This means that no two queens can share the same row, column, or diagonal. The problem can be solved using various techniques, including backtracking, constraint satisfaction, and even genetic algorithms. The task is not only a great exercise in logic and problem-solving but also serves as a benchmark for testing optimization algorithms. The N-Queens problem can be adjusted in complexity by varying the value of N and exploring whether solutions exist, as well as understanding how the solutions scale with size.

Frontend Developer

Interviewed at Zoho (India)

4.1★
Jan 8, 2025

The N-Queens problem is a classic algorithmic challenge that involves placing N chess queens on an N×N chessboard so that no two queens threaten each other. This means that no two queens can share the same row, column, or diagonal. The problem can be solved using various techniques, including backtracking, constraint satisfaction, and even genetic algorithms. The task is not only a great exercise in logic and problem-solving but also serves as a benchmark for testing optimization algorithms. The N-Queens problem can be adjusted in complexity by varying the value of N and exploring whether solutions exist, as well as understanding how the solutions scale with size.

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