30 questions · from 6 interviews
Browserstack interview questions
Every question candidates reported from their Browserstack interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.
Browserstack coding and DSA questions
- 01
OOP Booking System Design
Design and implement a basic booking system using Object-Oriented Programming principles. The system should include methods like book() , cancel() , and other necessary utility methods within a class structure.
- 02
Maximize Product of Numbers in Array
Given an array of integers, find the maximum product that can be obtained by multiplying elements within the array.
- 03
Add Two 4-Digit Numbers with 2-Digit Constraint
We have developed a new programming language with a constraint: Numbers with more than 2 digits are not supported (both input and output). Using this, add two 4-digit numbers like 8908 + 9980. The result should be computed such that each intermediate and…
Hard · From BrowserStack Tele Round Interview
- 04
Check for Overflow in Limited Range Addition
Given a programming language that only supports numbers from 0–99, determine if adding two numbers will cause overflow.
Easy · From BrowserStack Interview Experience - SDE 2
- 05
Daily Temperatures
You are given an array of temperatures. For each day, determine how many days you'd have to wait until a warmer temperature. Input: [72, 71, 74, 75, 69, 71, 76, 73] Output: [2, 1, 1, 3, 1, 1, 0, 0]
Medium · From BrowserStack Interview Experience - SDE 2
- 06
Arithmetic Operations on Huge String Values
Given two huge values as strings, you need to perform an arithmetic operation. Assume that in an Integer, the maximum value that can be stored is 9999 (4 digits). Function signature: Function perform(String a, String b, String action) Test cases: num1 =…
Medium · From BrowserStack | SDE 2 | Screening round
- 07
API Data Table with Pagination, Search, and Sorting
Implement a web application that fetches data from an API, displays it in a table, and includes pagination, search functionality, and column sorting within the table.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
Browserstack system design questions
- 01
Browser Control Web Service (No Selenium)
Develop a simple web service to programmatically interact with Google Chrome and Mozilla Firefox browsers without using Selenium or any other web drivers. The service should expose API endpoints for the following functionalities: Start: Launch a specified…
- 02
Design Project Architecture & Scaling
Design the system architecture of the project using draw.io. Explain how the system scales and handles concurrent users. Talk about real-world scaling issues I faced and how I addressed them — especially in terms of performance optimization and distributed…
- 03
What happens when you type a URL in the browser?
What happens when you hit a URL like google.com in the browser? 🔹 Which protocol is used and what steps occur in sequence? 🔹 What is TCP and how does the TCP handshake work? 🔹 How many handshakes does TCP involve? 🔹 What does the server send back in…
- 04
Real-time Log Viewer (tail -f like utility)
Problem: Build a real-time log viewer (like tail -f in UNIX) Task: A server-side program that monitors a large, append-only log file and streams new content in real-time. A web client accessible at http://localhost/log which: Displays last 10 lines of the…
Hard · From BrowserStack Interview Experience - SDE 2
- 05
Count Unique Words in a Very Large File
How would you count the number of unique words in a very large file, where storing everything in memory (e.g., via a map) isn’t feasible?
Hard · From BrowserStack Interview Experience - SDE 2
- 06
Project Tech Stack Justification and Design
Explain the high-level design of your projects. Discuss how your current tech-stack aligns with the requirements of a specific project (e.g., XYZ project from your resume) or which tech stack you would choose to build it. Compare RabbitMQ vs. Redis Queue, and…
- 07
What happens when you enter a URL in a browser?
Provide a detailed explanation of the entire process that occurs when a URL is entered into a browser. Your explanation should cover aspects such as the TCP/IP protocol, the 3-way handshake, and the standard ports used for HTTPS (443) and HTTP (80).
- 08
What Happens When You Type google.com?
Describe the detailed sequence of events that unfold from the moment a user types 'google.com' into a web browser's address bar and presses Enter, covering aspects such as DNS resolution, TCP connection establishment, HTTP request/response, server processing,…
- 09
Processing a Large File
Discuss various strategies and architectural considerations for efficiently processing an extremely large file (e.g., several terabytes) given typical resource constraints (memory, CPU). This is an open-ended question; consider aspects like batch processing,…
- 10
Implement Autocomplete Feature Design
Discuss how you would implement an autocomplete feature, considering its design and technical challenges.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
Browserstack behavioural and HR questions
- 01
Hardest Technical Problem Solved Recently
Describe the hardest technical problem you’ve solved recently. This should involve a challenging bug or architectural issue.
- 02
Productivity Planning
Walk me through your typical day and how you plan and prioritize tasks to ensure maximum productivity and effective time management.
- 03
Reasons for Leaving Current Company
Could you elaborate on your primary reasons for seeking to leave your current role and what you are looking for in your next career opportunity?
Browserstack other questions
- 01
Divide Square into Equal Parts
Explain how to divide a perfect square into 2, 3, 4, and 5 equal parts.
- 02
How a Browser Works Internally
Explain how a browser works internally – what happens when a URL is entered into the address bar.
- 03
Content Delivery Network (CDN)
Discuss Content Delivery Networks (CDN).
- 04
- 05
WebSockets vs HTTP
Explain the differences between WebSockets and HTTP.
- 06
JavaScript and Browser Fundamentals
Explain the JavaScript Event Loop. What is the difference between setTimeout and setImmediate ? Analyze a given JavaScript code snippet. Where is the image source stored when using an <img> tag (e.g., src="" )? How does the browser download images…
- 07
React.js Lifecycle Explanation
Explain how React.js handles its lifecycle.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
- 08
React.js vs. Next.js Use Cases Comparison
Compare the use cases where React.js or Next.js would be a better choice.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
- 09
`forEach` vs. `map` Efficiency
Discuss the difference between forEach and map , particularly which one is more efficient when dealing with large datasets.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
- 10
Dashboard UI Replication from Image
Build a dashboard UI based on a provided image, focusing on ensuring proper layout, alignment, and spacing.
From BrowserStack Frontend Developer Interview Experience (2+ YOE)
Browserstack interview questions FAQ
What questions are asked in Browserstack interviews?
Candidates reported 30 distinct questions across 6 Browserstack interviews. 7 coding and DSA questions, 10 system design questions, 3 behavioural and HR questions, 10 other questions.
How difficult are Browserstack interview questions?
Of the questions candidates rated, 17% were easy, 33% medium and 50% hard.