AdvantageClub.ai Front end Developer Interview Questions and Answers

Q1. Write a compare function that compares two objects
Ans. 
A compare function to compare two objects
• Create a function that takes in two objects as parameters

• Loop through the keys of one object and compare them with the keys of the other object

• Return true if the objects have the same keys and values, otherwise return false
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Q2. Longest substring without repeating characters
Ans. 
Find the longest substring without repeating characters
• Use a sliding window approach to keep track of the current substring

• Use a hash set to store the characters in the current substring

• Update the start index of the window when a repeating character is encountered
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Q1. Props in reactjs
Ans. 
Props in ReactJS are used to pass data from parent to child components.
• Props are read-only and cannot be modified by the child component.

• Props can be any type of data, including strings, numbers, arrays, objects, functions, etc.

• Props are passed down the component tree from parent to child using the syntax .
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Q2. How would u make webapp efficient
Ans. 
Optimize code, minimize network requests, use lazy loading, implement caching
• Optimize code by removing unnecessary code, using efficient algorithms, and reducing render times

• Minimize network requests by combining multiple requests, using server-side rendering, and implementing data caching

• Use lazy loading to only load resources when needed, improving initial load times

• Implement caching for frequently accessed data to r
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Q1. Closers along with mcq on closers
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Q2. Event loop detailed explanation
Ans. 
Event loop is a mechanism in JavaScript that allows for asynchronous operations to be executed in a non-blocking way.
• Event loop is responsible for handling the execution of code in JavaScript.

• It allows for asynchronous operations to be executed without blocking the main thread.

• Tasks are added to the event queue and executed in the order they were added.

• Event loop continuously checks the call stack and the event queue t
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Normal react counter question, lifecycle method

Q1. Basics of JavaScript, Coding
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Q1. React Core Concepts, Coding
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Q1. Design Jira Dashboard (LLD), WhatsApp (HLD)
Ans. 
Designing Jira Dashboard and WhatsApp HLD
• For Jira Dashboard, focus on displaying project status, issue tracking, and team performance metrics

• For WhatsApp HLD, consider features like messaging, voice and video calls, group chats, and file sharing

• Ensure user-friendly interface and seamless navigation for both applications
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