Fun Puzzles!-React dated 01/04/2023

Hello Everyone!
Here I am having some Fun puzzles for you!
Solve and reply your answer!
1.What does the spread operator (…) do in ES6?

A. It creates a new array by concatenating two existing arrays.

B. It creates a new object with the same properties as an existing object.

C. It extracts the elements from an array or the properties from an object and spreads them out into a new array or object.
D. It creates a new function that has the same behavior as an existing function.

  1. Which of the following is not a feature of ES6 classes?

A. Inheritance

B. Encapsulation

C. Polymorphism

D. Multiple inheritance

  1. What is the purpose of the React virtual DOM?

A. It provides a way to manipulate the actual DOM directly.

B. It allows for more efficient rendering by only updating the parts of the DOM that have changed.

C. It provides a way to store and manage state information in a React application.

D. It allows for easy integration of third-party libraries and plugins with a React application.

  1. What is the difference between props and state in a React component?

A. Props are used to pass data from a parent component to a child component, while state is used to store data within a component itself.

B. Props and state are both used to store data within a component, but props can only be passed down from a parent component, while state can only be accessed within the component itself.

C. Props and state are interchangeable terms that both refer to the data stored within a React component.

D. Props are used to define the structure of a component, while state is used to define the behavior of a component.

  1. What is the arrow function syntax in ES6?

A. function myFunction() {}

B. const myFunction = function() {}

C. () => {}

D. function()

Have a Happy Learning

Thanks & Regards

Teaching Assistant,
Dharshini M.

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