Fun with JavaScript

What is JavaScript used for?

• JavaScript is used for creating desktop applications.

• JavaScript is used for web development to enhance user interfaces and create interactive web applications.

• JavaScript is mainly used for database management.

• JavaScript is primarily used for server-side programming.

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 type of loop used for iteration.

• A variable in JavaScript is a function that performs calculations.

Name a data type in JavaScript.

• boolean

• string

• integer

• array

What does 'let' do in JavaScript?

• Initializes a variable without scope.

• Creates a constant variable.

• Declares a global variable.

• Declares a block-scoped variable.

What is a function?

• A function is a type of variable.

• A function is a mathematical relation that maps inputs to outputs.

• A function is a graphical representation of data.

• A function is a method to store data in a database.

What is the purpose of a return statement?

• To define a variable within a function.

• To create a loop in the code.

• The purpose of a return statement is to exit a function and return a value to the caller.

• To comment out a section of code.

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.

How do you change the text of an HTML element?

• Use CSS to modify the element's color.

• Use JavaScript to set the 'innerText' or 'textContent' property of the HTML element.

• Change the font size of the element.

• Add a new HTML element to the page.

What does DOM stand for?

• Document Object Module

• Dynamic Object Model

• Data Object Model

• Document Object Model

How do you select an element by its ID?

• Select elementID using getElementById('elementID');

• Use document.getElementById('elementID');

• Access element by ID with document.selectById('elementID');

• Use document.querySelector('#elementID');