ReactJs: React Hooks
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Total 20 question (100 marks)
1. ref is used to refer a element / component returned by _______________.
2. Which prop takes a function to be called when the text is submitted for TextInput component, in React?
3. React merges the object you provide into the current state using __________
4. In React state can be accessed using ________.
5. Props are __________ into other components
6. How do you handle passing through the component tree without having to pass props down manually at every
7. How can you access the state of a component from inside of a member function?
8. Which of the following is NOT a rule for React Hooks?
9. Which prop type in a React form component, will validate a value for an attribute is passed and
10. What is a common use case for ref?
11. Why should you avoid copying the values of props into a component's state?
12. We can go for keys when there is a possibility that our user could change the data.
13. Although React Hooks generally replace class components, there are no plans to remove classes from React.
14. What happens when you call setState() inside render() method?
15. A copy of the 'real' DOM that is kept in memory is called what?
16. Keys are given to a list of elements in react. These keys should be:
17. Which of the following needs to be updated to achieve dynamic UI updates?
18. The state can be initialized when code is loaded or the state can be set on event changes.
19. What will happen if you render an input element with disabled = {false}?
20. An altered component may be uniquely identified with the help of ref.
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