React Interview Masterclass: Top 200 Questions (With Pdf)

React - Basics/ JSX/ Routing/ Lifecycle Methods/ Hooks/ Redux/ Typescript (with PDF/ PPT Revision Book)

What you'll learn

React Interview Preparation

200 React Interview Question and Answers

How to Crack React Interviews

React interview guide in PDF format

Requirements

Basic Programming Experience Required

Description

One Stop Destination For All React Interview Questions and Answers.Top 200 React Interview Questions and Answers: (Video Lectures + Revision PDF Book)(Topics from which  questions are covered)React-Basics - I React-Basics - II React Project - Main Files & Folders JSX Components - Functional/ Class Routing Hooks -useState/ useEffect Hooks - useContext/ useReducer Hooks - useCallback/ useMemo/ useRef/ useLayoutEffect Hooks - Best Practices/ Short Answer Components LifeCycle Methods - I Components LifeCycle Methods - II Controlled & Uncontrolled Components Code Splitting React - Others Redux - Component/ Action/ Store/ Reducer Redux - Core Principles/ Pros-Cons/ Local & Redux State Redux - Short Answer Redux - Thunk/ Middleware/ Error Handling/ Flux JavaScript Essentials for ReactTypescriptRevision PDF Boos: All notes are present in PDF and PPT format in resources of the course.Code: For every question, the code is present in its slide notes of PowerPoint.Interview Preparation Tracker Sheet: All questions listed in this tracker excel. Just have a look just before the interviews.About Instructor: 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. He helps candidates in cracking the interviews.All the best for your interview preparation.Remember, NEVER EVER GIVE UP before selection while giving job interviews.

Overview

Section 1: Introduction

Lecture 1 Introduction

Section 2: React-Basics - I

Lecture 2 React-Basics - I - Introduction

Lecture 3 Q 1. What is React? What is the Role of React in software development?

Lecture 4 Q2. What are the Key Features of React?

Lecture 5 Q3. What is DOM? What is the difference between HTML and DOM?

Lecture 6 Q4. What is Virtual DOM? Difference between DOM and Virtual DOM?

Lecture 7 Q5. What are React Components? What are the main elements of it?

Lecture 8 Q6. What is SPA(Single Page Application)?

Lecture 9 Q7. What are the 5 Advantages of React?

Lecture 10 Q8. What are the Disadvantages of React?

Lecture 11 Q9. What is the role of JSX in React? (3 points)

Lecture 12 Q10. What is the difference between Declarative & Imperative syntax?

Section 3: React-Basics - II

Lecture 13 React-Basics - II

Lecture 14 Q11. What is Arrow Function Expression in JSX?

Lecture 15 Q12. How to Setup React first project?

Lecture 16 Q13. What are the Main Files in a React project?

Lecture 17 Q14. How React App Load and display the components in browser?

Lecture 18 Q15. What is the difference between React and Angular?

Lecture 19 Q16. What are other 5 JS frameworks other than React?

Lecture 20 Q17. Whether React is a Framework or a Library? What is the difference?

Lecture 21 Q18. How React provides Reusability and Composition?

Lecture 22 Q19. What are State, Stateless, Stateful and State Management terms?

Lecture 23 Q20. What are Props n JSX?

Section 4: React Project - Main Files & Folders

Lecture 24 React Project - Main Files & Folders

Lecture 25 Q21. What is NPM? What is the role of node_modules folder?

Lecture 26 Q22. What is the role of public folder in React?

Lecture 27 Q23. What is the role of src folder in React?

Lecture 28 Q24. What is the role of index.html page in React?

Lecture 29 Q25. What is the role of index.js file and ReactDOM in React?

Lecture 30 Q26. What is the role of App.js file in React?

Lecture 31 Q27. What is the role of function and return inside App.js?

Lecture 32 Q28. Can we have a function without a return inside App.js?

Lecture 33 Q29. What is the role of export default inside App.js?

Lecture 34 Q30. Does the file name and the component name must be same in React?

Section 5: JSX

Lecture 35 JSX

Lecture 36 Q31. What is the role of JSX in React? (3 points)

Lecture 37 Q32. What are the 5 Advantages of JSX?

Lecture 38 Q33. What is Babel?

Lecture 39 Q34. What is the role of Fragment in JSX?

Lecture 40 Q35. What is Spread Operator in JSX?

Lecture 41 Q36. What are the types of Conditional Rendering in JSX?

Lecture 42 Q37. How do you iterate over a list in JSX? What is map() method?

Lecture 43 Q38. Can a browser read a JSX File?

Lecture 44 Q39. What is Transpiler? What is the difference between Compiler & Transpiler?

Lecture 45 Q40. Is it possible to use JSX without React?

Section 6: Components - Functional/ Class

Lecture 46 Components - Functional/ Class

Lecture 47 Q41. What are React Components? What are the main elements of it?

Lecture 48 Q42. What are the Types of React components? What are Functional Components?

Lecture 49 Q43. How do you pass data between functional components in React?

Lecture 50 Q44. What is Prop Drilling in React?

Lecture 51 Q45. Why to Avoid Prop Drilling? In how many ways can avoid Prop Drilling?

Lecture 52 Q46. What are Class Components In React?

Lecture 53 Q47. How to pass data between class components in React?

Lecture 54 Q48. What is the role of this keyword in class components?

Lecture 55 Q49. Differences btw Functional components and Class components?

Section 7: Routing

Lecture 56 Routing - Introduction

Lecture 57 Q50. What is Routing and Router in React?

Lecture 58 Q51. How to Implement Routing in React?

Lecture 59 Q52. What are the roles of & component in React Routing?

Lecture 60 Q53. What are Route Parameters in React Routing?

Lecture 61 Q54. What is the role of Switch Component in React Routing?

Lecture 62 Q55. What is the role of exact prop in React Routing?

Section 8: Hooks -useState/ useEffect

Lecture 63 Hooks -useState/ useEffect

Lecture 64 Q56. What are React Hooks? What are the Top React Hooks?

Lecture 65 Q57. What are State, Stateless, Stateful and State Management terms?

Lecture 66 Q58. What is the role of useState() hook and how it works?

Lecture 67 Q59. What is the role of useEffect(). How it works and what is its use?

Lecture 68 Q60. What is Dependency Array in useEffect() hook?

Lecture 69 Q61. What is the meaning of the empty array [] in the useEffect()?

Section 9: Hooks - useContext/ useReducer

Lecture 70 Hooks - useContext/ useReducer

Lecture 71 Q62. What is the role of useContext() hook?

Lecture 72 Q63. What is createContext() method? What are Provider & Consumer properties?

Lecture 73 Q64. When to use useContext() hook instead of props in real applications?

Lecture 74 Q65. What are the similarities between useState() and useReducer() hook?

Lecture 75 Q66. What is useReducer() hook? When to use useState() and when useReducer()?

Lecture 76 Q67. What are the differences between useState() and useReducer() Hook?

Lecture 77 Q68. What are dispatch & reducer function in useReducer Hook?

Lecture 78 Q69. What is the purpose of passing initial state as an object in UseReducer?

Section 10: Hooks - useCallback/ useMemo/ useRef/ useLayoutEffect

Lecture 79 Hooks - useCallback/ useMemo/ useRef/ useLayoutEffect

Lecture 80 Q70. What is the role of useCallback() hook in React?

Lecture 81 Q71. What parameters does the useCallback hook accept & what does it returns?

Lecture 82 Q72. What is the role of useMemo() Hook?

Lecture 83 Q73. What is the role of useRef() Hook?

Lecture 84 Q74. What useLayoutEffect() Hook? Compare it with useEffect() hook.

Lecture 85 Q75. When to use useLayoutEffect() Hook?

Section 11: Hooks - Best Practices/ Short Answer

Lecture 86 Hooks - Best Practices/ Short Answer

Lecture 87 Q76. What are the Rules or Best Practices for hooks implementation?

Lecture 88 Q77. What are Custom Hooks?

Lecture 89 Q 78- Q83

Lecture 90 Q84. What are the uses of all the Hooks in React?

Section 12: Components LifeCycle Methods - I

Lecture 91 Components LifeCycle Methods - I

Lecture 92 Q85. What are Component life cycle phases?

Lecture 93 Q86. What are Component life cycle methods?

Lecture 94 Q87. What are Constructors in class components? When to use them?

Lecture 95 Q88. What is the role of super keyword in constructor?

Lecture 96 Q89. What is the role of render() method in component life cycle?

Lecture 97 Q90. How the State can be maintained in a class component?

Lecture 98 Q91. What is the role of componentDidMount() method in component life cycle?

Section 13: Components LifeCycle Methods - II

Lecture 99 Components LifeCycle Methods - II

Lecture 100 Q92. What is the role of componentDidUpdate() method in component life cycle?

Lecture 101 Q93. What is the role of componentWillUnmount() method in component life cycle?

Lecture 102 Q94 - Q98

Section 14: Controlled & Uncontrolled Components

Lecture 103 Controlled & Uncontrolled Components

Lecture 104 Q99. What are Controlled Components in React?

Lecture 105 Q100. What are the Differences btw Controlled & Uncontrolled Components?

Lecture 106 Q101. What are characteristics of controlled components?

Lecture 107 Q102. What are the advantages of using controlled components in React forms?

Lecture 108 Q103 - Q106

Section 15: Code Splitting

Lecture 109 Code Splitting

Lecture 110 Q107. What is Code Splitting in React?

Lecture 111 Q108. How to Implement Code Splitting in React?

Lecture 112 Q109. What is the role of Lazy and Suspense methods in React?

Lecture 113 Q110. What are the Pros and Cons of Code Splitting?

Lecture 114 Q 111 - Q114

Section 16: React - Others

Lecture 115 React - Others

Lecture 116 Q115. What is a Higher-Order Component in React?

Lecture 117 Q116. What are the 5 ways to Style React components? Explain Inline Styles?

Lecture 118 Q117. What are the differences between React & React Native?

Lecture 119 Q118. What is GraphQL?

Lecture 120 Q119. Ways to achieve state management? When to use what in React?

Lecture 121 Q120. How can you Implement Authentication in a React application?

Lecture 122 Q121. What is the use of React Profiler?

Lecture 123 Q122. What is the difference between fetch & axios for api calls in React?

Lecture 124 Q123. What are the popular Testing Libraries for React?

Lecture 125 Q124. How can you Optimize Performance in a React application?

Lecture 126 Q125. Explain Reactive Programming with example?

Lecture 127 Q126. In how many ways can we implement Reactive Programming in React?

Lecture 128 Q127. How to pass data from child component to parent Component in React?

Section 17: Redux - Component/ Action/ Store/ Reducer

Lecture 129 Redux - Component/ Action/ Store/ Reducer

Lecture 130 Q128. What is the role of Redux in React?

Lecture 131 Q129. When to use Hooks and when to use Redux in React applications?

Lecture 132 Q130. What is the Flow of data in React while using Redux?

Lecture 133 Q131. How to install Redux for React application?

Lecture 134 Q132. What are Action Creators in React Redux?

Lecture 135 Q133. Difference between Action Creators, Action Object & Action Type?

Lecture 136 Q134. Explain React Component Structure while using Redux?

Lecture 137 Q135. What is the role of Store in React Redux?

Lecture 138 Q136. What is the role of Reducer in Redux?

Section 18: Redux - Core Principles/ Pros-Cons/ Local & Redux State

Lecture 139 Redux - Core Principles/ Pros-Cons/ Local & Redux State

Lecture 140 Q137. Explain the Core Principles of Redux?

Lecture 141 Q138. List 5 benefits of using Redux in React?

Lecture 142 Q139. What are the differences between local component state & Redux state?

Lecture 143 Q140. What are the challenges or disadvantages while using Redux?

Section 19: Redux - Short Answer

Lecture 144 Redux - Short Answer

Lecture 145 Q141. What is Provider Component?

Lecture 146 Q142. What is the role of Connect function in React-Redux?

Lecture 147 Q143. What are the 4 Important Files in React-Redux project?

Lecture 148 Q144. How to structure the project and maintain state in multiple components?

Lecture 149 Q145. Explain the concept of immutability in the context of Redux?

Lecture 150 Q146. Typical properties of an Action object in React-Redux project?

Lecture 151 Q147. Difference btw mapDispatchToProps & mapStateToProps in the connect?

Lecture 152 Q148. What is the meaning of Unidirectional Data Flow in Redux?

Lecture 153 Q149. How does Redux handle communication between components?

Lecture 154 Q150. What is Payload property in Redux?

Section 20: Redux - Thunk/ Middleware/ Error Handling/ Flux

Lecture 155 Redux - Thunk/ Middleware/ Error Handling/ Flux - Introduction

Lecture 156 Q151. Difference between Regular Action creator & Thunk action creator?

Lecture 157 Q152. Explain the concept of Middleware in React-Redux?

Lecture 158 Q153. How can you handle Asynchronous Operations & side-effect in React-Redux?

Lecture 159 Q154. How does Error Handling work in Redux?

Lecture 160 Q155. What is the difference between Flux & Redux?

Section 21: JavaScript Essentials for React

Lecture 161 JavaScript Essentials for React

Lecture 162 Q156. What are variables? What is the difference between var, let, and const ?

Lecture 163 Q157. What are the types of conditions statements in JS?

Lecture 164 Q158. What is Error Handling in JS?

Lecture 165 Q159. What is the difference between Spread and Rest operator in JS?

Lecture 166 Q160. What are Arrays in JS? How to get, add & remove elements from arrays?

Lecture 167 Q161. What is Array Destructuring in JS?

Lecture 168 Q162. What are Functions in JS? What are the types of function?

Lecture 169 Q163. Difference between named and anonymous functions? When to use what?

Lecture 170 Q164. What is function expression in JS?

Lecture 171 Q165. What are Arrow Functions in JS? What is it use?

Lecture 172 Q166. What are Callback Functions? What is it use?

Lecture 173 Q167. What is Higher-order function In JS?

Lecture 174 Q168. What are Pure and Impure functions in JS?

Lecture 175 Q169. What are template literals and string interpolation in strings?

Lecture 176 Q170. What are Objects in JS?

Lecture 177 Q171. What is the difference between an array and an object?

Lecture 178 Q172. How do you add or modify or delete properties of an object?

Lecture 179 Q173. What is asynchronous programming in JS? What is its use?

Lecture 180 Q174. What is the difference between synchronous and asynchronous programming?

Lecture 181 Q175. What are Promises in JavaScript?

Lecture 182 Q176. How to implement Promises in JavaScript?

Lecture 183 Q177. What is the purpose of async/ await? Compare it with Promises?

Lecture 184 Q178. What are Classes in JS?

Lecture 185 Q179. What is a constructor?

Lecture 186 Q180. What is the use of this keyword?

Section 22: Typescript

Lecture 187 Typescript - Introduction

Lecture 188 Q181. What is Typescript?Difference between Typescript and Javascript?

Lecture 189 Q182. How to install Typescript and check version?

Lecture 190 Q183. What is the difference between let and var keyword?

Lecture 191 Q184. What is Type annotation?

Lecture 192 Q185. Primitive and Non-primitive Types in Typescript?

Lecture 193 Q186. What is “any” type in Typescript?

Lecture 194 Q187. What is Enum type in Typescript?

Lecture 195 Q188. What is the difference between void and never types in Typescript?

Lecture 196 Q189. What is Type Assertion in Typescript?

Lecture 197 Q190. What are Arrow Functions in Typescript?

Lecture 198 Q191. What is Object Oriented Programming in Typescript?

Lecture 199 Q192. What are Classes and Objects in Typescript?

Lecture 200 Q193. What is Constructor?

Lecture 201 Q194. What are Access Modifiers in Typescript?

Lecture 202 Q195. What is Encapsulation in Typescript?

Lecture 203 Q196. What is Inheritance in Typescript?

Lecture 204 Q197. What is Polymorphism in Typescript?

Lecture 205 Q198. What is Interface in Typescript?

Lecture 206 Q199. What's the difference between extends and implements in TypeScript ?

Lecture 207 Q200. Is Multiple Inheritance possible in Typescript?

Lecture 208 END

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