Senior Full Stack Engineer Interview Questions

1,780 senior full stack engineer interview questions shared by candidates

Coding exercise by sharing the screen: Problem: Given a non-empty array of integers, return the k most frequent elements. // Example: Input: [4,1,1,1,2,2,3], k = 2 Output: [1, 2] // Example: Input: [5,5,5,1,1,1,1,2,2,3], k = 3 Output: [1, 5, 2] Technical Questions: Angular: What are routes and how does routing work? How to manage state? C#/.Net: Dependency Injection, Extension methods, Async and Await and some behavioral questions.
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Senior Full Stack Developer

Interviewed at Government of Alberta

3.4
Sep 19, 2024

Coding exercise by sharing the screen: Problem: Given a non-empty array of integers, return the k most frequent elements. // Example: Input: [4,1,1,1,2,2,3], k = 2 Output: [1, 2] // Example: Input: [5,5,5,1,1,1,1,2,2,3], k = 3 Output: [1, 5, 2] Technical Questions: Angular: What are routes and how does routing work? How to manage state? C#/.Net: Dependency Injection, Extension methods, Async and Await and some behavioral questions.

Building a fullstack app in a live coding round with focus on both frontend (UI) and backend (REST API design, SQL and interacting with the database for a CRUD operation) followed by general SQL based questions for ranking and optimised updates to a large dataset.

Senior Full Stack Developer

Interviewed at Astra Tech

1
Jul 30, 2025

Building a fullstack app in a live coding round with focus on both frontend (UI) and backend (REST API design, SQL and interacting with the database for a CRUD operation) followed by general SQL based questions for ranking and optimised updates to a large dataset.

Leetcode style…Swap the first n letters of s with the rest of the string. 1. In O(N) time and space 2. In O(N) time, O(1) space Swap the first n letters of s with the rest of the string. Args: s: Input string n: Length of the prefix to swap Returns: Modified string with the first n letters swapped with the rest s = "abcdefgh" n = 3 result = swap_prefix_suffix(s, n) print(result) # Output: "defghabc"
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Senior Full Stack Engineer

Interviewed at Fiverr Inc.

4.1
Mar 16, 2025

Leetcode style…Swap the first n letters of s with the rest of the string. 1. In O(N) time and space 2. In O(N) time, O(1) space Swap the first n letters of s with the rest of the string. Args: s: Input string n: Length of the prefix to swap Returns: Modified string with the first n letters swapped with the rest s = "abcdefgh" n = 3 result = swap_prefix_suffix(s, n) print(result) # Output: "defghabc"

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