
JavaScript Fundamentals for Students
Quiz
•
Information Technology (IT)
•
11th Grade
•
Practice Problem
•
Hard
Salma Esmat
FREE Resource
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a variable in JavaScript?
A variable in JavaScript is a named container for storing data values.
A variable in JavaScript is a method for defining classes.
A variable in JavaScript is a function that performs calculations.
A variable in JavaScript is a type of loop used for iteration.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a valid way to declare a variable?
let x = 5;
x = 5;
const x : 5;
var x = 5;
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the different data types in JavaScript?
string, number, boolean, null, undefined, symbol, object
array, function, set
date, time, list
integer, float, character
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you convert a string to a number in JavaScript?
Apply Math.round(string)
Convert using toString(string)
Use stringToNumber(string) method
Use Number(string), parseInt(string), or parseFloat(string) to convert a string to a number.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of a function in JavaScript?
To store data in variables
The purpose of a function in JavaScript is to encapsulate code for reuse and to perform specific tasks.
To define global variables
To create HTML elements
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between function declaration and function expression?
Function expression can be called before its definition.
Function declaration can only be used in strict mode.
Function declaration is hoisted and can be called before its definition, while function expression is not hoisted and must be defined before it can be called.
Function declaration and function expression are the same.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is scope in JavaScript?
Scope is the method of error handling in JavaScript.
Scope is a type of JavaScript function.
Scope refers to the speed of JavaScript execution.
Scope in JavaScript defines the visibility and lifetime of variables and functions.
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