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React-tutorial Quiz 2
Question 1
What is the main purpose of using PropTypes in React?
- A
To style React components
- B
To check the type of props at runtime
- C
To fetch data from APIs
- D
To improve rendering performance
Question 2
Which of the following correctly validates a name prop as a required string using PropTypes?
- A
name: PropTypes.string.optional - B
name: PropTypes.string.required
- C
name: PropTypes.string.isRequired
- D
name: string.required
Question 3
What is "prop drilling" in React?
- A
Passing props through context
- B
Passing props from parent to deeply nested child components
- C
Using Redux to manage state
- D
Replacing props with hooks
Question 4
Which of the following is a drawback of prop drilling?
- A
Components become tightly coupled
- B
Easier state sharing
- C
Faster rendering
- D
Enhanced encapsulation
Question 5
Why is it important to provide a key prop when rendering lists in React?
- A
To display data in alphabetical order
- B
To improve network performance
- C
To help React identify which items changed, added, or removed
- D
To apply styles to each item
Question 6
What will this code output?
const items = ['A', 'B'];
return (
<ul>
{items.map((item, index) => <li key={index}>{item}</li>)}
</ul>
);
- A
A list with items A and B
- B
Error due to missing keys
- C
Nothing will render
- D
Only the first item renders
Question 7
What problem does the Context API solve in React?
- A
Component styling
- B
Avoiding prop drilling by sharing data globally
- C
Making API requests
- D
Optimizing component rendering
Question 8
What is the role of a Provider in the Context API?
- A
To fetch external data
- B
To define initial component styles
- C
To allow children to consume context values
- D
To optimize rendering speed
Question 9
What is the main reason for using Redux in a React application?
- A
Component styling
- B
Static file optimization
- C
Centralized state management
- D
Animation control
Question 10
In Redux, what is the “store”?
- A
A UI component
- B
A container that holds application state
- C
A collection of React hooks
- D
A database
There are 10 questions to complete.