Eternal Infotech Interview Questions and Answers

To showcase a project to demostrate context api

Q1. What is event loop
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 asynchronous operations in JavaScript.

• It allows for tasks to be queued and executed in a non-blocking manner.

• Event loop continuously checks the call stack and the task queue, moving tasks from the queue to the call stack when the stack is empty.

• Example: setTimeout()...read more
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Q2. What is context api
Ans. 
Context API is a feature in React that allows sharing data between components without having to pass props through every level of the component tree.
• Context API provides a way to pass data through the component tree without having to pass props down manually at every level.

• It is useful for sharing global data such as themes, user authentication, or language preferences.

• Context API consists of three main parts: Provider...read more
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Q3. What is prop drilling
Ans. 
Prop drilling is the process of passing down props from a parent component to multiple levels of nested child components.
• Prop drilling can lead to a lot of unnecessary passing of props through intermediate components.

• It can make the code harder to maintain and understand.

• One way to avoid prop drilling is by using context API or state management libraries like Redux.
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Q4. What is CSR and SSR
Ans. 
CSR stands for Client-Side Rendering and SSR stands for Server-Side Rendering.
• CSR involves rendering web pages on the client side using JavaScript.

• SSR involves rendering web pages on the server side and sending the fully rendered page to the client.

• CSR is faster for subsequent page loads as it only fetches data, while SSR is slower but better for SEO.

• Examples: React uses CSR by default, while Next.js allows for SSR.
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