JavaScript and React Quiz

JavaScript and React Quiz

University

20 Qs

quiz-placeholder

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JavaScript and React Quiz

JavaScript and React Quiz

Assessment

Quiz

Professional Development

University

Practice Problem

Medium

Created by

Karnam Bharath

Used 3+ times

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of axios.get() in JavaScript?

To send data to a server

To fetch data from a server

To update data on a server

To delete data from a server

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method is used to test if an array contains a specific element?

find()

includes()

filter()

some()

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In JavaScript, what does Object.freeze() do?

Prevents new properties from being added but allows existing properties to change

Prevents adding or removing properties but allows property values to change

Prevents adding, removing, or changing properties

Converts an object to a string

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which lifecycle method is used to run code after a React component mounts?

componentWillMount

componentDidUpdate

componentDidMount

componentWillUnmount

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the output of this code? const foo = () => ({ bar: 1 }); console.log(foo());

{ bar: 1 }

bar: 1

undefined

SyntaxError

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which function is used to delay execution in JavaScript?

setDelay()

setTimeout()

wait()

delay()

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In React, what is a prop?

A function that modifies state

A special variable used to create components

A way to pass data from parent to child components

A global variable

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