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


2. Predictability of Redux is determined by __________ most important principles.

A. Two
B. Three
C. Four
D. Five

View Answer


3. 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


4. ___________ is a plain object that describes the intention to cause change with a type property.

A. class
B. plain
C. action
D. object

View Answer


5. Actions and states are held together by a function called?

A. Reducer
B. Redux
C. suscribe
D. view

View Answer


6. Redux follows the ____________ data flow.

A. unidirectional
B. bidirectional
C. Both A and B
D. None of the above

View Answer


7. The ____________ can retrieve updated state and re-render again.

A. state
B. store
C. view
D. action

View Answer


8. The _______ notifies the view by executing their callback functions

A. state
B. store
C. reducer
D. action

View Answer


9. A store is an ___________ object tree in Redux. 

A. immutable
B. mutable
C. Both A and B
D. None of the above

View Answer


10. Redux can have _________ store in your application

A. single
B. double
C. multi
D. None of the above

View Answer


11. A createStore function can have _________ arguments.

A. 1
B. 2
C. 3
D. 4

View Answer


12. Which method helps you retrieve the current state of your Redux store?

A. dispatch
B. subscribe
C. action
D. getState

View Answer


13. Which of the following is react-Redux helper method?

A. help()
B. assist()
C. view()
D. connect()

View Answer


14. Which of the following rules are correct for Pure Functions?

A. A function returns the same result for same arguments.
B. Its evaluation has no side effects, i.e., it does not alter input data.
C. No mutation of local & global variables
D. All of the above

View Answer


15. Reducers are a pure function in Redux.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

View Answer


16. Pure functions are unpredictable

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

View Answer


17. Which of them provide us debugging platform for Redux apps?

A. Redux-Testing
B. Redux-Middleware
C. Redux-Devtools
D. Redux-suscriber

View Answer


18. Both props and state are plain JavaScript objects.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

View Answer


19. Which of the following makes stores available?

A. COMPONENT
B. CONTAINER
C. ACTIONS
D. PROVIDER

View Answer


20. Which method allows you to dispatch an action to change a state in your application?

A. getState
B. setState
C. dispatch
D. subscribe

View Answer





Discussion


* You must be logged in to add comment.