BrowserStack Senior Software Engineer Interview Questions, Process, and Tips

Q1. Design a data structure that can take a number with infinite digits and support operation like addition
Ans. Create a linked list of number where each node is a digit of a number
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Q2. Explain in-depth of the projects you did
Ans. Explain project in details with all complexities
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Q1. Design a system that reads content of a file and show it in a webpage as the file gets update the webpage should also get updated in realtime
Ans. 
Design a system to display real-time updates of a file's content on a webpage.
• Use a server-side programming language like Node.js to read the file content.

• Implement a WebSocket connection between the server and the webpage for real-time updates.

• Whenever the file is updated, send the updated content to the webpage using the WebSocket connection.

• Update the webpage dynamically using JavaScript to display the new content.
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Q1. Engineering Manager round - Explain the projects you did in detail
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Q1. Director round - Explain the projects in details
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Q1. Explain projects in high level
Ans. 
I have worked on various projects involving software development and implementation.
• Developed a web application for a retail company to manage inventory and sales.

• Implemented a mobile app for a healthcare organization to track patient data and appointments.

• Created a data analysis tool for a financial institution to analyze market trends and make investment decisions.
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Q2. Explain your strong points
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Q3. Explain your entire background
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Q1. How google.com works
Ans. 
Google.com is a search engine that uses web crawlers to index websites and algorithms to rank search results.
• Google uses web crawlers to index websites and store information in its database.

• Algorithms are used to rank search results based on relevance and popularity.

• Google also uses personalized search results based on user data and location.

• Google's homepage is simple and fast-loading to provide a user-friendly experi
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Q2. How rest works, in array of 500 elements give top 15 elements discussion about complexities
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Q1. General question about the project, challenges, etc
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Q1. Implement tail -f command w/o use of external libraries
Ans. 
Implementing tail -f command without external libraries in Python
• Open the file in read mode

• Use a loop to continuously read new lines added to the file

• Print the new lines as they are read
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Q1. General questions on challenges, current role, production issues
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Q2. DSA Question - next warm day
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Q1. Existing project details
Ans. 
The existing project is a web application for managing inventory and sales.
• Built using React for the front-end and Node.js for the back-end

• Uses MongoDB as the database

• Includes features such as user authentication, product management, and sales tracking
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Q1. Scale up existing project
Ans. 
Scaling up an existing project involves optimizing performance, increasing capacity, and improving efficiency.
• Identify bottlenecks and areas for improvement

• Implement caching mechanisms to reduce load times

• Optimize database queries for faster retrieval

• Upgrade hardware or infrastructure to handle increased traffic

• Use load balancing to distribute traffic evenly across servers
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