JavaScript Basics and Web Development Quiz

What is the purpose of a function in JavaScript?

• Functions are used to create loops in JavaScript

• Functions are used to style HTML elements in JavaScript

• Functions are used to define variables in JavaScript

• Functions are used to group a block of code that can be called and executed whenever required.

Which keyword is used to declare a function in JavaScript?

• var

• def

• class

• function

What is the correct syntax to call a function named 'myFunction' in JavaScript?

• myFunction();

• call myFunction();

• function myFunction();

• myFunction();

Which of the following is NOT a valid JavaScript data type?

• String

• Number

• Boolean

• Symbol

What does the 'if' statement do in JavaScript?

• Executes a block of code if a specified condition is false

• Executes a block of code if a specified condition is true

• Executes a block of code only once

• Executes a block of code regardless of the condition

Which method is used to add an element to the end of an array in JavaScript?

• append()

• addToEnd()

• push()

• insert()

What does the acronym 'DOM' stand for in web development?

• Digital Object Management

• Document Object Model

• Dynamic Object Mapping

• Data Object Model

Which method is used to change the text content of an HTML element using JavaScript?

• outerHTML

• innerText

• textContent

• innerHTML

What is the purpose of the 'getElementById' method in JavaScript?

• To create a new element with a unique ID attribute.

• To retrieve an element from the DOM based on its class name attribute.

• To modify the ID attribute of an element in the DOM.

• To retrieve an element from the DOM based on its unique ID attribute.

Which event is triggered when a user clicks on an HTML element?

• submit

• click

• hover

• keydown