JavaScript Fundamentals Quiz Senior

What is the purpose of comments in JavaScript?

• To execute code

• To explain code (useful for developers)

• To style the webpage

• To create animations

Which naming convention is commonly used for variables and functions in JavaScript?

• PascalCase

• CamelCase

• kebab-case

• snake_case

What is the purpose of the <noscript> tag

• To create interactive elements

• To display alternative content for users with disabled JavaScript

• To add styling to the webpage

• To include external scripts

What is the difference between mutable and immutable variables in JavaScript?

• Mutable variables can be changed, while immutable variables cannot

• Mutable variables cannot be changed, while immutable variables can

• There is no difference between mutable and immutable variables

• Mutable variables are declared using const, while immutable variables use let

What is the purpose of the debugger keyword in JavaScript?

• To print messages to the console

• To execute code

• To stop code execution at a specific point and open the browser's development tools

• To create breakpoints in the code

What are reserved words in JavaScript?

• Words that are reserved for future use in JavaScript

• Words that cannot be used as names for variables, functions, or other identifiers

• Words that are used for comments in JavaScript

• Words that are used for styling in JavaScript

What does the console.log method do in JavaScript?

• Stop code execution

• Print messages to the browser's console

• Create breakpoints in the code

• Open the browser's development tools

When should you use internal scripts in HTML?

• For external scripts only

• For small, page-specific scripts that are not reused across multiple pages

• For styling the webpage

• For large scripts that take time to load

What is the purpose of indentation in JavaScript?

• To hide the code from browsers

• To show the structure and hierarchy of the code

• To confuse other developers

• To make the code harder to read

How are multi-line comments enclosed in JavaScript?

• Enclosed between {} and {}

• Enclosed between

• Enclosed between /* and */

• Enclosed between // and //