SDE - 1

You are given an integer, all you have to do is to find whether this number is a Fibonacci number or not.

Fn is said to be a Fibonacci sequence such that each number in Fn is the sum of its two preceding numbers, starting with 0 and 1.

Fn = F(n-1) + F(n-2)

fn is said to be a Fibonacci number if it is a part of the Fn/Fibonacci sequence.

You are provided with the boilerplate code of a React project for a Todo Application. Your task is to implement and complete the core functionalities of the application. The following features need to be developed:

Functional Requirements:

1. Add New Todo: Implement functionality to create and add a new todo item with a title and creation date.
2. Update Todo Status: Allow users to toggle the status of a todo item between open and closed.
3. Delete Todo: Implement functionality to remove a todo item from the list.
4. Sort Todos by Creation Date: Add functionality to sort the list of todos based on their creation date in either ascending or descending order.

You are given several JavaScript code snippets. Your task is to analyze each snippet and predict its output.

Write a throttling function. When should we use it?

Implement a polyfill for the Array.prototype.filter() method. The polyfill should replicate the exact behavior of the native method.

You are required to implement a Kanban Board component using React.js. A Kanban Board is a visual workflow management tool that organizes tasks across different stages (e.g., To Do, In Progress, Done).

What are Babel and Webpack?

What is virtualization, and how do we implement it?

What is Next.js? (Learn)

Explain SSR (Server-Side Rendering), CSR (Client-Side Rendering), and SSG (Static Site Generation) with suitable examples.

Explain JWT (JSON Web Token) authentication.

Build a React.js application that supports multiple themes—specifically Light Mode and Dark Mode. The user should be able to toggle between these themes at runtime.

This round was mainly a basic HR round focused on understanding my background and personality. Most of the questions were based on the information mentioned in my resume. The interviewer asked me to talk about my past experiences, skills, and projects to get a clear idea of my work history and strengths.