Variables in JavaScript

Variables in JavaScript

Assessment

Interactive Video

Information Technology (IT), Architecture

KG - University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

This video tutorial introduces JavaScript variables, covering types like strings, integers, floating points, booleans, and objects. It explains how to declare, use, and output variables, including the concept of constants. The tutorial also demonstrates how to handle errors when trying to change constants and how to output object variables. The importance of coding exercises for learning is emphasized.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of using 'let' in JavaScript?

To declare a constant

To declare a class

To declare a variable

To declare a function

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a string literal in JavaScript?

48

'Mark'

true

3.89

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of variable holds either true or false?

Object

String

Boolean

Integer

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary use of a Boolean variable?

To store text

To store true or false values

To store arrays

To store numbers

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a type of variable in JavaScript?

String

Integer

Character

Boolean

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which operator is used for concatenation in JavaScript?

-

*

+

/

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of trying to change a constant's value in JavaScript?

The constant is deleted

The program continues without changes

The value changes successfully

An error is thrown

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