BYJU'S Software Developer Interview Questions and Answers for Freshers

Q1. Two pointer questions
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Q2. Are you married
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Number system,30 min duration

Q1. What is promises
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used in JavaScript to handle asynchronous operations.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained together using .then() to handle success or failure.

• They help avoid callback hell and make asynchronous code more readable.

• Example: const myPromise = new Promise((res
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Q2. What is html and css
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HTML and CSS are languages used for creating and styling web pages.
• HTML (Hypertext Markup Language) is used for structuring content on a web page.

• CSS (Cascading Style Sheets) is used for styling the appearance of the content.

• HTML uses tags to define elements like headings, paragraphs, images, and links.

• CSS allows for customization of colors, fonts, layouts, and more.

• Both HTML and CSS are essential for creating visually
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Basic numeric ability and reasoning

Easy to medium level problems of dsa

Q1. It was one and a half hour long round basically what ever your have written down on your resume they will ask you
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Medium to hard level DSA from leetcode

Medium to hard level DSA from leetcode

Q1. General HR questions.
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Q1. Basic question of javascript like temporal dead zone, hoisting
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Q2. Basic of sql and mongo
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Q1. Logic bluiding question
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Q2. 2 leet code quesztion
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Q1. Slaray negotiation
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Given two questions on personal round

Q1. Technical 1 to 1
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Q2. On dsa
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Q1. Final and friendly round
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Q1. Tell me about your project?
Ans. 
Developed a web application for tracking personal fitness goals and progress.
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end functionality

• Utilized MongoDB for database management
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Q2. What is useState, useEffect, useRedux?
Ans. 
useState, useEffect, useRedux are hooks in React for managing state and side effects.
• useState is a hook used for managing state in functional components.

• useEffect is a hook used for handling side effects in functional components.

• useRedux is not a built-in hook, but a common convention for using Redux with React.
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Q3. Tell me the changes too place in 2015 EcMascript?
Ans. 
In 2015, EcmaScript 6 (ES6) was released with significant updates and new features.
• Introduction of let and const for block-scoped variables

• Arrow functions for more concise syntax

• Classes for object-oriented programming

• Template literals for string interpolation

• Enhanced object literals and destructuring assignments
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Q4. Explain the flow about how API works?
Ans. 
API works by allowing different software applications to communicate with each other through a set of rules and protocols.
• API receives a request from a client application

• API processes the request and interacts with the server

• API sends back a response to the client application

• Examples: REST API, SOAP API
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