IDP Education Limited Software Developer Interview Questions and Answers

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
Ans. 
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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Q1. Explain about Android lifecycle
Ans. 
Android lifecycle refers to the series of states that an activity or fragment goes through from creation to destruction.
• Android lifecycle includes states like onCreate, onStart, onResume, onPause, onStop, onDestroy, etc.

• Activities and fragments transition between these states based on user interactions and system events.

• Understanding Android lifecycle is crucial for managing resources, saving state, and handling config...read more
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Q2. Explain about fragment lifecycle
Ans. 
Fragment lifecycle refers to the series of events that occur in the lifespan of a fragment in an Android app.
• Fragments go through various states like created, started, resumed, paused, stopped, and destroyed.

• Fragment lifecycle methods include onCreate(), onCreateView(), onResume(), onPause(), onStop(), onDestroy(), etc.

• Fragment lifecycle is closely tied to the hosting activity's lifecycle.

• Understanding fragment lifecyc...read more
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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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Q1. No any interview
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Q2. It's aptitude test only
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Question on Linked list. array and string manipulation.