JavaScript Interview Questions and Answers for freshers

JavaScript Interview Questions and Answers for freshers | JavaScript Interview Questions for Beginners | JavaScript Interview Questions With Answer | JavaScript Interview Questions 

JavaScript Interview Questions and Answers for Freshers: The many organisations will conduct the recruitment process without written examinations. Many Government organisations and private Sectors mostly conducted the merit list and interview process. Mostly interview questions ask related the post and qualification. Candidates attend the interview without fear. The JavaScript is one of the high level programming languages. Most of hiring is released for JavaScript Qualification employees. The JavaScript Related questions are asked all interview. The candidates eagerly preparing for the JavaScript Interview. Interview Questions and Answers for freshers will ask Basics of JavaScript Program. Candidate should prepare the common JavaScript Interview Questions and Answers/ JavaScript Interview Questions for freshers.

The Company will conduct the Test on given respective date. Many of the candidates attended the test. Those who shortlisted in the Online test, they only attend the Interview. The Interview questions contains all programming languages, skill etc., The JavaScript is one of the important part and program in every interview. Candidates searching the JavaScript Interview Questions and Answers. Prepare Interview while using this JavaScript Interview Questions & Answers for freshers. By the practicing of the JavaScript Interview Questions and answers, you will place at required Position. The Interview date will be intimated on your Mail. Applicants keep track the mail, to get the interview notice. Once you will select the Interview, the Company will send the Offer Letter in your Mail.

JavaScript Interview Questions and Answers for Beginners

1. What are the different data types present in javascript?

Primitive Types,
Non-Primitive Types​

2. What are the primitive data types in JavaScript? ​

Number
String
Boolean
BigInt
Null
Undefined
Symbol types

3. There are 8 basic data types in JavaScript.

Null
Undefined
Number
Boolean
BigInts
Object
String
Symbol

4. What are the features of JavaScript?

Lightweight, interpreted programming language
Cross-platform compatible
Open-source
Object-oriented
Integration with other backend and frontend technologies
Used especially for the development of network-based applications

5.How do you create an array in JavaScript?

var a = [];

var b = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’];

6. What are the scopes of a variable in JavaScript?
Global Scope
Local Scope

7. Typeof in JavaScript to Check Undefined Data Type

/ undefined keyword

console.log(typeof undefined)

// Declared but undefined variable

let a

console.log(typeof a);

// Undefined variable

console.log(typeof v);

8.How would you create a cookie?

document.cookie = “key1 = value1; key2 = value2; expires = date”;

9. What are Closures in JavaScript?

function hello(name) {

var message = “hello ” + name;

return function hello() {

console.log(message);

};

}

//generate closure

var helloWorld = hello(“World”);

//use closure

helloWorld();

10. What are the arrow functions in JavaScript?

const helloWorld = () => {

console.log(“hello world!”);

};

11. What are Imports and Exports in JavaScript?

calc.js

export const sqrt = Math.sqrt;

export function square(x) {

return x * x;

}

export function diag(x, y) {

return sqrt(square(x) + square(y));

}

12. Difference between “ == “ and “ === “ operators (with examples)

“==” operator is a comparison operator that used to compare the values
“===” operator is also a comparison operator that is used to compare the values as well as types.

13. Immediately Invoked Function in JavaScript

Syntax

(function()

{

// Do something;

})

();

15. What are object prototypes?

Date objects are used to inherit properties from the Date prototype
Math objects are used to inherit properties from the Math prototype
Array objects are used to inherit properties from the Array prototype.

16. Types of errors in javascript

Javascript has two types of errors, Syntax error, and Logical error.

17. What is WeakSet?

WeakSet is a collection of unique and ordered elements that contain only objects which are referenced weakly.

18. What is a WeakMap?

Weakmap is referred to as an object having keys and values, if the object is without reference, it is collected as garbage.

19. What is this [[[]]]?

This ‘[[[]]]’ is a three-dimensional array.

20. How do you empty an array in JavaScript?

               By assigning array length to 0:

var arr = [1, 2, 3, 4];

arr.length = 0;

             By assigning an empty array:

var arr = [1, 2, 3, 4];

arr = [];

            By popping the elements of the array:

var arr = [1, 2, 3, 4];

while (arr.length > 0) {

arr.pop();

}

          By using the splice array function:

var arr = [1, 2, 3, 4];

arr.splice(0, arr.length);

Common JavaScript Interview questions and Answers, JavaScript Interview Questions for freshers etc., is available in the web page of dailyrecruitment.in. Candidates while using this page to attend the SQTI Interview Successfully.

INSTAGRAM	FOLLOW HERE >>
TELEGRAM	JOIN NOW>>