CollegeDekho React Js Frontend Developer Interview Questions and Answers

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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Medium to hard level DSA from leetcode

Medium to hard level DSA from leetcode

Q1. General HR questions.
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Q1. Data structures
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Q1. System Design fundamentals
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Q1. System Design questions
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Q1. What do you think about the negative news going around the company
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Q1. Why join this company
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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
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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. 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.

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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Q1. Asked about lazy loading ?
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Q2. What do you mean by denouncing?
Ans. 
Denouncing refers to publicly declaring something as wrong or evil.
• Denouncing is the act of condemning or criticizing something publicly.

• It is often done to express disapproval or to call attention to a wrongdoing.

• Examples include denouncing acts of violence, discrimination, or corruption.

• Denouncing can also be used in political contexts to criticize policies or actions of a government.
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Q3. How redux state are cleaned ?
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Redux state can be cleaned by dispatching an action to reset the state to its initial values.
• Dispatching an action with type 'RESET_STATE'

• Updating the reducer to return the initial state when 'RESET_STATE' action is dispatched
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Q4. Sorting the array
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Q5. Make pagination and sorting coding questions.
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Q1. How Netflix video loading works it was of system design
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Netflix uses a content delivery network (CDN) to efficiently load videos based on user location and network conditions.
• Netflix uses a distributed network of servers to store and deliver video content closer to users for faster loading times.

• Content is cached on servers located in various regions to reduce latency and improve streaming quality.

• Netflix employs adaptive bitrate streaming to adjust video quality based on a...read more
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Q2. How can we download csv file of more then 1000mb and show the data that is downloaded while downloading?
Ans. 
To download a large CSV file (>1000mb) and show the data while downloading, use streaming and pagination techniques.
• Implement streaming to download the file in chunks instead of all at once.

• Use pagination to display the downloaded data in parts as it is being downloaded.

• Consider using libraries like PapaParse for parsing CSV data efficiently.

• Show a progress bar or indicator to inform the user about the download status.
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Q3. Pattern question
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Q4. React assingment
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