JavaScript Interview Masterclass: Top 200 Questions & Answer

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Happy Rawat

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1. Introduction

1.1 Top-200-JS-Interview-Questions-pdf.pdf

1.2 top-200-js-interview-questions-tracker.zip

1.3 Top-200-JS-Interview-Questions.pptx

1. Introduction of JavaScript Interview Course.mp4

03:07

2. Basics

1. Introduction - Basics.mp4

00:33

2. Q1. What is JavaScript What is the role of JavaScript engine.mp4

02:45

3. Q2. What are client side and server side.mp4

01:30

4. Q3. What are variables What is the difference between var, let, and const .mp4

03:32

5. Q4. What are some important string operations in JS.mp4

02:10

6. Q5. What is DOM What is the difference between HTML and DOM.mp4

01:05

7. Q6. What are selectors in JS.mp4

01:05

8. Q7. Difference getElementById, getElementsByClassName and get elementsByTagName.mp4

02:42

9. Q8. What are data types in JS.mp4

01:23

10. Q9. What are operators What are the types of operators in JS.mp4

00:53

11. Q10. What are the types of conditions statements in JS.mp4

03:19

12. Q11. What is a loop What are the types of loops in JS.mp4

01:25

13. Q12. What are Functions in JS What are the types of function.mp4

01:26

14. Q13. What are Arrow Functions in JS What is it use.mp4

02:14

15. Q14. What are Arrays in JS How to get, add & remove elements from arrays.mp4

02:59

16. Q15. What are Objects in JS.mp4

02:00

17. Q16. What is Scope in JavaScript.mp4

01:24

18. Q17. What is Hoisting in JavaScript.mp4

01:49

19. Q18. What is Error Handling in JS.mp4

01:16

20. Q19. What is JSON.mp4

01:00

21. Q20. What is asynchronous programming in JS What is its use.mp4

03:27

3. Variables & Datatypes

1. Variables & Datatypes - Introduction.mp4

00:41

2. Q21. What are variables What is the difference between var, let, and const .mp4

03:32

3. Q22. What are data types in JS.mp4

01:23

4. Q23. What is the difference between primitive and non-primitive data types.mp4

04:07

5. Q24. What is the difference between null and undefined in JS.mp4

02:50

6. Q25. What is the use of typeof operator.mp4

01:16

7. Q26. What is type coercion in JS.mp4

01:41

4. Operators & Conditions

1. Operators & Conditions - Introduction.mp4

00:32

2. Q27. What are operators What are the types of operators in JS.mp4

00:53

3. Q28. What is the difference between unary, binary, and ternary operators.mp4

01:33

4. Q29. What is short-circuit evaluation in JS.mp4

02:16

5. Q30. What is operator precedence.mp4

00:54

6. Q31. What are the types of conditions statements in JS.mp4

03:19

7. Q32. When to use which type of conditions statements in real applications.mp4

03:32

8. Q33. What is the difference between == and ===.mp4

01:46

9. Q34. What is the difference between Spread and Rest operator in JS.mp4

03:26

5. Arrays

1. Arrays - Introduction.mp4

00:43

2. Q35. What are Arrays in JS How to get, add & remove elements from arrays.mp4

02:59

3. Q36. What is the indexOf() method of an Array.mp4

00:48

4. Q37. What is the difference between find() and filter() methods of an Array.mp4

03:02

5. Q38. What is the slice() method of an Array.mp4

01:16

6. Q39. What is the difference between push() and concat () methods of an Array .mp4

01:27

7. Q40. What is the difference between pop() and shift() methods of an Array.mp4

01:22

8. Q41. What is the splice() method of an Array.mp4

03:27

9. Q42. Difference between the slice() and splice() methods of an Array.mp4

00:40

10. Q43. What is the difference map() and for Each() array methods of an Array.mp4

02:37

11. Q44. How to sort and reverse an array.mp4

00:51

12. Q45. What is Array Destructuring in JS.mp4

01:38

13. Q46. What are array-like objects In JS.mp4

02:52

14. Q47. How to convert an array-like object into an array.mp4

01:33

6. Loops

1. Loops - Introduction.mp4

00:26

2. Q48. What is a loop What are the types of loops in JS.mp4

01:25

3. Q49. What is the difference between while and for loops.mp4

02:13

4. Q50. What is the difference between while and do-while loops.mp4

01:50

5. Q51. What is the difference between break and continue statement.mp4

01:35

6. Q52. What is the difference between for and forof loop in JS.mp4

01:32

7. Q53. What is the difference between forof and forin loop.mp4

01:28

8. Q54. What is forEach method Compare it with forof and forin loop.mp4

02:32

9. Q55. When to use forof loop and when to use forEach method in applications.mp4

01:39

7. Functions

1. Functions - Introduction.mp4

00:38

2. Q56. What are Functions in JS What are the types of function.mp4

01:26

3. Q57. Difference between named and anonymous functions.mp4

01:48

4. Q58. What is function expression in JS.mp4

01:11

5. Q59. What are Arrow Functions in JS What is it use.mp4

02:14

6. Q60. What are Callback Functions What is it use.mp4

02:26

7. Q61. What is Higher-order function In JS.mp4

02:14

8. Q62. What is the difference between arguments and parameters.mp4

00:44

9. Q63. In how many ways can you pass arguments to a function.mp4

01:42

10. Q64. How do you use default parameters in a function.mp4

00:56

11. Q65. What is the use of event handling in JS.mp4

02:40

12. Q66. What are First-Class functions in JS.mp4

01:25

13. Q67. What are Pure and Impure functions in JS.mp4

02:57

14. Q68. What is Function Currying in JS.mp4

02:34

15. Q69. What are call, apply and bind methods in JS.mp4

02:34

8. Strings

1. Strings - Introduction.mp4

00:21

2. Q70. What is a String.mp4

00:19

3. Q71. What are template literals and string interpolation in strings.mp4

01:31

4. Q72. Difference between single quotes (), double quotes () & backticks() .mp4

00:37

5. Q73. What are some important string operations in JS.mp4

02:10

6. Q74. What is string immutability.mp4

01:34

7. Q75. In how many ways you can concatenate strings.mp4

01:17

9. DOM

1. DOM - Introduction.mp4

00:29

2. Q76. What is DOM What is the difference between HTML and DOM.mp4

02:31

3. Q77. How do you select, modify, create and remove DOM elements.mp4

00:56

4. Q78. What are selectors in JS.mp4

01:05

5. Q79. Difference between getElementById,getElementsByClassName& getElementsByTag.mp4

02:42

6. Q80. What is the difference between querySelector() and querySelectorAll().mp4

01:07

7. Q81. What are the methods to modify elements properties and attributes.mp4

00:39

8. Q82. What is the difference between innerHTML and textContent.mp4

01:24

9. Q83. How to add and remove properties of HTML elements in the DOM using JS.mp4

01:07

10. Q84. How to add and remove style from HTML elements in DOM using JS.mp4

00:56

11. Q85. Create new elements in DOM using JS.mp4

02:20

12. Q86. What is the difference between createElement() and createTextNode().mp4

01:05

10. Error Handling

1. Error Handling- Introduction.mp4

00:25

2. Q87. What is Error Handling in JS.mp4

01:16

3. Q88. What is the role of finally block in JS.mp4

01:21

4. Q89. What is the purpose of the throw statement in JS.mp4

01:30

5. Q90. What is Error propagation in JS.mp4

00:38

6. Q91. What are the best practices for error handling.mp4

01:02

7. Q92. What are the different types of errors In JS.mp4

01:18

11. Objects

1. Objects - Introduction.mp4

00:29

2. Q93. What are Objects in JS.mp4

02:00

3. Q94. In how many ways we can create an object.mp4

01:36

4. Q95. What is the difference between an array and an object.mp4

00:57

5. Q96. How do you add or modify or delete properties of an object.mp4

00:37

6. Q97. Explain the difference between dot notation and bracket notation.mp4

01:24

7. Q98. What are some common methods to iterate over the properties of an object.mp4

01:32

8. Q99. How do you check if a property exists in an object.mp4

01:23

9. Q100. How do you clone or copy an object.mp4

01:48

10. Q101. What is the difference between deep copy and shallow copy in JS.mp4

02:46

11. Q102. What is Set Object in JS.mp4

02:27

12. Q103. What is Map Object in JS.mp4

01:26

13. Q104. What is the difference between Map and Object in JS.mp4

01:01

12. Events

1. Events - Introduction.mp4

00:27

2. Q105. What are Events How are events triggered.mp4

01:40

3. Q106. What are the types of events in JS.mp4

01:05

4. Q107. What is Event Object in JS.mp4

02:02

5. Q108. What is Event Delegation in JS.mp4

02:01

6. Q109. What is Event Bubbling In JS.mp4

01:40

7. Q110. How can you stop event propagation or event bubbling in JS.mp4

01:10

8. Q111. What is Event Capturing in JS.mp4

01:42

9. Q112. What is the purpose of the event.preventDefault() method in JS.mp4

01:08

10. Q113. What is the use of this keyword in the context of event handling in JS.mp4

00:38

11. Q114. How to remove an event handler from an element in JS.mp4

00:59

13. Closures

1. Closures - Introduction.mp4

00:29

2. Q115. Explain the concept of Lexical Scoping.mp4

01:16

3. Q116. What is Closure.mp4

01:53

4. Q117. What are the benefits of Closures.mp4

04:34

5. Q118. What is the concept of Encapsulation in the context of closures.mp4

01:21

6. Q119. What are the disadvantage or limitations of Closures.mp4

01:02

7. Q120. How can you release the variable references or closures from memory.mp4

00:26

8. Q121. What is the difference between a Regular Function and a Closure.mp4

00:59

14. Asynchronous programming - Basics

1. Asynchronous programming Basics - Introduction.mp4

00:33

2. Q122. What is asynchronous programming in JS What is its use.mp4

03:27

3. Q123. What is the difference between synchronous and asynchronous programming.mp4

01:39

4. Q124. What are the techniques for achieving asynchronous operations in JS.mp4

00:37

5. Q125. What is setTimeout() How is it used to handle asynchronous operations.mp4

02:09

6. Q126. What is setInterval() How is it used to handle asynchronous operations.mp4

01:33

7. Q127. What is the role of callbacks in fetching API data asynchronously.mp4

02:27

8. Q128. What is callback hell How can it be avoided.mp4

01:44

15. Asynchronous Programming - Promises

1. Asynchronous Programming - Promises - Introduction.mp4

00:29

2. Q129. What are Promises in JavaScript.mp4

02:45

3. Q130. How to implement Promises in JavaScript.mp4

02:30

4. Q131. When to use Promises in real applications.mp4

00:47

5. Q132. What is the use of Promise.all() method.mp4

02:11

6. Q133. What is the use of Promise.race() method.mp4

01:23

7. Q134. What is the difference between Promise.all() and Promise.race().mp4

01:08

16. Asynchronous Programming - Async Await

1. Asynchronous Programming Async Await - Introduction.mp4

00:16

2. Q135. What is the purpose of async await Compare it with Promises.mp4

04:15

3. Q136. Explain the use of async and await keywords in JS.mp4

03:04

4. Q137. Can we use async keyword without await keyword and vice versa.mp4

00:44

5. Q138. How do you handle errors in async await functions.mp4

00:30

17. Browser APIs & Web Storage

1. Browser APIs & Web Storage - Introduction.mp4

00:26

2. Q139. What is a window object.mp4

01:01

3. Q140. What are Browser APIs in JS.mp4

01:52

4. Q141. What is Web Storage, and its use How many types of web storage are there.mp4

02:05

5. Q142. What is Local Storage How to store, retrieve and remove data from it.mp4

02:21

6. Q143. What is Session Storage How to store, retrieve and remove data from it.mp4

01:49

7. Q144. What is the difference between LocalStorage and SessionStorage.mp4

02:36

8. Q145. How much data can be stored in localStorage and sessionStorage.mp4

00:34

9. Q146. What are cookies How do you create and read cookies.mp4

01:49

10. Q147. What is the difference between cookies and web storage.mp4

01:23

11. Q148. When to use cookies and when to use web storage.mp4

01:22

18. Classes, Constructors, this & Inheritance

1. Classes, Constructors, this & Inheritance - Introduction.mp4

00:15

2. Q149. What are Classes in JS.mp4

03:08

3. Q150. What is a constructor.mp4

00:50

4. Q151. What are constructor functions.mp4

00:50

5. Q152. What is the use of this keyword.mp4

01:33

6. Q153. Explain the concept of prototypal inheritance.mp4

02:20

19. ECMAScript & Modules

1. ECMAScript & Modules - Introduction.mp4

00:26

2. Q154. What is ES6 What are some new features introduced by it.mp4

01:05

3. Q155. What are Modules in JS.mp4

02:36

4. Q156. What is the role of export keyword.mp4

00:51

5. Q157. What are the advantages of modules.mp4

00:56

6. Q158. What is the difference between named exports and default exports.mp4

01:01

7. Q159. What is the difference between static and dynamic imports.mp4

01:22

8. Q160. What are module bundlers.mp4

01:23

20. Security & Performance

1. Security & Performance - Introduction.mp4

00:18

2. Q161. What is eval() function in JS.mp4

00:49

3. Q162. What is XSS (Cross-Site Scripting) attack.mp4

01:01

4. Q163. What is SQL Injection attack.mp4

00:52

5. Q164. What are some best practices for security in JS.mp4

01:19

6. Q165. What are the best practices for improving performance in JS.mp4

02:08

21. Scenario based - Tricky Short Questions

1. Scenario based Tricky Short Questions - Introduction.mp4

00:56

2. Q166- Q185.mp4

10:33

22. Scenario based - Feature Development Questions

1. Scenario based Feature Development Questions - Introduction.mp4

00:35

2. Q186. How to validate user input as they type in a form.mp4

01:37

3. Q187. How to implement pagination for displaying large sets of data.mp4

02:05

4. Q188. How to implement drag-and-drop functionality for elements on a web page.mp4

01:29

5. Q189. Feature that allows users to search for specific items in a large dataset.mp4

01:26

6. Q190. Feature that allows users to perform live search suggestions as they type.mp4

01:37

7. Q191. How to implement a real-time chat application using JS.mp4

03:03

8. Q192. Create an infinite scrolling using JS when a user reaches the webpage .mp4

01:25

9. Q193. Implement toggle switch to change the theme(lightdark mode) of a website.mp4

01:26

10. Q194. How to use JS to dynamically update date in real time on webpage.mp4

01:25

11. Q195. Prevent a form from being submitted without required fields being filled.mp4

00:51

23. Coding

1. Coding - Introduction.mp4

00:32

2. Q196. Write a function that returns the reverse of a string.mp4

02:04

3. Q197. Write a function that returns the longest word in the sentence.mp4

02:13

4. Q198. Function that checks whether a given string is a palindrome or not.mp4

01:23

5. Q199. Write a function to remove duplicate elements from an array.mp4

03:42

6. Q200. Write a function that checks whether two strings are anagrams or not.mp4

01:58

7. Q201. Write a function that returns the number of vowels in a string..mp4

01:50

8. Q202. Write a function to find the largest number in an array..mp4

01:47

9. Q203. Write a function to check if a given number is prime or not.mp4

02:21

10. Q204. Write a function to calculate the factorial of a number.mp4

01:38

11. Q205. Write a program to remove all whitespace characters from a string..mp4

01:46

12. Q206. Write a function to find the sum of all elements in an array.mp4

00:43

13. Q207. Write a function to find the average of an array of numbers.mp4

00:33

14. Q208. Write a function to sort an array of numbers in ascending order.mp4

03:14

15. Q209. Write a function to check if an array is sorted in ascending order or not.mp4

01:41

16. Q210. Write a function to merge two arrays into a single sorted array.mp4

01:13

17. Q211. Write a function to remove a specific element from an array.mp4

01:49

18. Q212. Write a function to find the second largest element in an array.mp4

01:19

19. Q213. Write a function to reverse the order of words in a given sentence.mp4

00:49

20. Q214. Function to find the longest common prefix among an array of strings.mp4

03:32

21. Q215. Write a function to find the intersection of two arrays.mp4

01:32

22. Q216. Write a function to calculate the Fibonacci sequence up to a given number.mp4

02:16

Description

Questions Covered - Basics/ Advance/ Coding/ Scenario Based JS Interview Questions(with PDF Book)

What You'll Learn?

How to Crack JavaScript Interviews
200 JavaScript Interview Question and Answers
50 JavaScript Coding and Scenario Based Interview Questions
JavaScript Interview Preparation

Who is this for?

Candidate looking for JavaScript jobs in software industry

What You Need to Know?

Yes, some basic knowledge of HTML and CSS is required

More details

Description
Are you checking out multiple websites and videos to collect the interview questions?
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Your search is over.
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This course contains the top 200 most important JavaScript questions.
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The instructor has more than 15 years of experience in full-stack development and has given and taken more than 100 interviews in his career.
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This course has 3 things with in it:
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1. The top 200 most important questions with their answers in the video lectures
Here are the topics covered:
Basics
Variables and data types
Operators & Conditions
Arrays
Loops
Functions
Strings
DOM
Error Handling
Objects
Events
Closures
Asynchronous programming: basics
Asynchronous Programming: Promises
Asynchronous Programming: Async Await
Browser APIs and Web Storage
Classes, constructors, this, and inheritance
ECMAScript and Modules
Security and Performance
Scenario-based: Tricky Short Questions
Scenario-based feature development questions
JS Coding Questions
All the questions are explained with the help of diagrams, code and definition. So that candidates can explain the answers in interviews with the help of examples.

2. 200 Interview Questions Book (pdf format and ppt) for Quick Revision.
The code is also present in the the ppt notes.
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3. Interview Preparation Excel: All questions listed in this tracker excel.
Just have a look just before the interviews.

All the best for your interview preparation.

Who this course is for:
Candidate looking for JavaScript jobs in software industry

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JavaScript

Happy Rawat

Instructor's Courses

My name is Happy Rawat. I have over 13 years of experience in software development. I have given and taken more than 200 technical interviews in my career. I want to share my learnings with others. My sole purpose is to help candidates fresher or experienced in CRACKING technical interviews.

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