ContactPoint 360 Front end Developer Interview Questions and Answers

Round duration - 360 minutes
Round difficulty - Medium

Basically TCS conduct its flagship event named as CODEVITA . And it offers Internship to prefinal (3rd )year students .

Q1. 
Allocate Books Problem Statement
Given an array of integers arr, where arr[i] represents the number of pages in the i-th book, and an integer m representing the number of students, allocate all the books ...read more
Ans. 
Allocate books to students in a way that minimizes the maximum number of pages assigned to a student.
• Iterate through possible allocations and calculate the maximum pages assigned to a student.

• Find the minimum of these maximums to get the optimal allocation.

• Return the minimum pages allocated in each test case, or -1 if not possible.
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2 DSA questions. Both medium level difficult

Q1. Based on html,css Javascript
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Q2. Based on ReactJs
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Q3. Javascript promise method
Ans. 
JavaScript Promise is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations such as fetching data from an API.

• They have three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() and .catch() methods.

• Promises can also be created using the Promise constructor.
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Q4. Javascript callback funtions
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Based on html, Css, Javascript and React-Js

Q1. How to handle state in functional components.
Ans. 
State in functional components can be managed using the useState hook in React.
• Use the useState hook to declare state variables in functional components.

• useState returns an array with the current state value and a function to update that value.

• Example: const [count, setCount] = useState(0);

• State variables should be immutable, so always use the setter function to update them.
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Q2. What is event loop in javascript.
Ans. 
Event loop in JavaScript is responsible for handling asynchronous operations by executing callback functions in a non-blocking way.
• Event loop is a mechanism that allows JavaScript to perform non-blocking operations.

• It continuously checks the call stack and the callback queue to see if there are any functions that need to be executed.

• If the call stack is empty, it takes the first function from the callback queue and pus...read more
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Q3. What is hosting in Javascript
Ans. 
Hosting in JavaScript refers to the process of declaring a variable or function before it is used in the code.
• Hosting allows you to use variables and functions before they are declared in the code.

• Variables are hoisted to the top of their scope, while functions are fully hoisted.

• Example: console.log(myVar); var myVar = 10; This will not throw an error because 'myVar' is hoisted to the top of the scope.
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Q1. General Questions are asked from Javascript and React
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Q2. What is the difference between virtual dom and real dom?
Ans. 
Virtual DOM is a lightweight copy of the real DOM, which updates only the changed elements, making the rendering process faster.
• Real DOM updates the entire page when a change is made, while Virtual DOM updates only the changed elements.

• Virtual DOM is a JavaScript object that represents the real DOM, and it is faster to update.

• React uses Virtual DOM to update the UI efficiently.

• Manipulating the real DOM is slower than m
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BCA in computer science

Q1. HTML CSS and JavaScript
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Q2. I'm looking for a job i skill and get experience
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Q3. Job Useful remember when information me
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1hr

Q1. About the ReactJS, Javascrirp,HTML5,CSS3 Questions
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Q1. Salary Discussion only
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