Redux Js MCQ Questions And Answers
ReduxJs MCQ : This section focuses on "Basics" of Redux Js. These Multiple Choice Questions (MCQ) should be practiced to improve the Redux Js skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.
1. Redux solves this problem by managing application’s state with a single global object called ?
A. directory
B. file
C. store
D. None of the above
View Answer
Ans : C
Explanation: Redux solves this problem by managing application’s state with a single global object called Store.
2. What is true about redux?
A. Redux is a predictable state container for JavaScript apps.
B. Redux fundamental principles help in maintaining consistency throughout your application
C. Redux makes debugging and testing easier
D. All of the above
View Answer
Ans : D
Explanation: All of the above statement are true.
3. Actions and states are held together by a function called?
A. Reducer
B. Redux
C. suscribe
D. view
View Answer
Ans : A
Explanation: Actions and states are held together by a function called Reducer. An action is dispatched with an intention to cause change. This change is performed by the reducer.
4. The ____________ can retrieve updated state and re-render again.
A. state
B. store
C. view
D. action
View Answer
Ans : C
Explanation: The view can retrieve updated state and re-render again.
5. A store is an ___________ object tree in Redux.
A. immutable
B. mutable
C. Both A and B
D. None of the above
View Answer
Ans : A
Explanation: A store is an immutable object tree in Redux.
6. A createStore function can have _________ arguments.
A. 1
B. 2
C. 3
D. 4
View Answer
Ans : C
Explanation: A createStore function can have three arguments. The following is the syntax : createStore(reducer, [preloadedState], [enhancer])
7. Which of the following is react-Redux helper method?
A. help()
B. assist()
C. view()
D. connect()
View Answer
Ans : D
Explanation: You can dispatch an action by directly using store.dispatch(). However, it is more likely that you access it with react-Redux helper method called connect(). You can also use bindActionCreators() method to bind many action creators with dispatch function.
8. Reducers are a pure function in Redux.
A. TRUE
B. FALSE
C. Can be true or false
D. Can not say
View Answer
Ans : A
Explanation: True, Reducers are a pure function in Redux.
9. Which of them provide us debugging platform for Redux apps?
A. Redux-Testing
B. Redux-Middleware
C. Redux-Devtools
D. Redux-suscriber
View Answer
Ans : C
Explanation: Redux-Devtools provide us debugging platform for Redux apps. It allows us to perform time-travel debugging and live editing.
10. Which of the following makes stores available?
A. COMPONENT
B. CONTAINER
C. ACTIONS
D. PROVIDER
View Answer
Ans : D
Explanation: PROVIDER : Makes stores available
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