BYJU'S SDE (Software Development Engineer) Interview Questions and Answers

Two dynamic programming challenges at the hard level on LeetCode and 10 medium-level SQL challenge.

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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Q1. Explain request lifecycle in rails?
Ans. 
Request lifecycle in Rails involves routing, controller actions, rendering views, and responding to the client.
• 1. Request comes in through the browser or API endpoint.

• 2. Rails router determines which controller and action to route the request to.

• 3. Controller action processes the request, interacts with the model, and prepares data for the view.

• 4. View template is rendered with the data from the controller.

• 5. Response ...read more
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Q2. Code Merge Sort using Ruby
Ans. 
Implement Merge Sort algorithm in Ruby
• Divide the array into two halves recursively

• Merge the sorted halves back together

• Use a helper method to merge the two halves
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Q1. Concepts of node and Js
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Q1. Basic Questions based on pervious project
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Q1. Sdlc lifecycle of components and architecture.
Ans. 
SDLC lifecycle involves planning, designing, developing, testing, deploying, and maintaining software components and architecture.
• SDLC (Software Development Life Cycle) includes phases like planning, designing, coding, testing, and maintenance.

• Components are designed, developed, tested, and integrated into the overall architecture.

• Architecture involves defining the structure, behavior, and interactions of software comp...read more
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Q1. Role and responsibility my tasks and questions on project
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Q1. Tell me about yourself
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Q2. Coding Question
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Q1. Tell me about yourself
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Q2. Salary discussion
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DS algo questions with about 3 questions in topic like graph, strings ,arrays

Q1. DS algo question on LinkedIn list
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Q2. DS algo question on graph
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