Quiz - JavaScript Basics

1. What does JS stand for?

a. JavaScript

b. Java Style

c. Java Syntax

d. JustScript

Correct Answer: JavaScript
Explanation: JS stands for JavaScript, the programming language used in web development.

2. Which of the following is a way to declare a variable?

a. var

b. let

c. const

d. All of the above

Correct Answer: All of the above
Explanation: In JavaScript, variables can be declared using var, let, or const.

3. How do you write a comment in JavaScript?

a.

b. // Comment

c. ** Comment **

d. ## Comment

Correct Answer: // Comment
Explanation: Single-line comments in JavaScript start with "//".

4. How do you write "Hello World" in an alert box?

a. alertBox("Hello World");

b. msg("Hello World");

c. alert("Hello World");

d. console.log("Hello World");

Correct Answer: alert("Hello World");
Explanation: The alert() function displays a message in a popup alert box.

5. Which symbol is used for strict equality comparison?

a. ==

b. ===

c. !=

d. =

Correct Answer: ===
Explanation: "===" checks for both value and type equality in JavaScript.

6. Which method converts a JSON string into a JavaScript object?

a. JSON.parse()

b. JSON.stringify()

c. Object.parse()

d. JSON.object()

Correct Answer: JSON.parse()
Explanation: JSON.parse() converts a JSON string into a JavaScript object.

7. How do you create a function in JavaScript?

a. function myFunction() { }

b. func myFunction() { }

c. create function myFunction() { }

d. function:myFunction() { }

Correct Answer: function myFunction() { }
Explanation: The function keyword is used to define a function in JavaScript.

8. How do you write an if statement in JavaScript?

a. if i = 5 then

b. if i == 5

c. if (i == 5) { }

d. if i = 5 { }

Correct Answer: if (i == 5) { }
Explanation: The correct syntax for an if statement uses parentheses and curly braces.

9. Which operator is used to assign a value?

a. ==

b. ===

c. =

d. !=

Correct Answer: =
Explanation: The single equals sign "=" is used to assign a value to a variable.

10. Which function is used to print something to the console?

a. console.print()

b. console.write()

c. console.log()

d. print.console()

Correct Answer: console.log()
Explanation: console.log() is used to output messages to the web console.

JavaScript Basics Quiz