Which of the following file extensions is commonly used for JavaScript files?

What is the best practice for naming JavaScript identifiers?

A). Use short and cryptic names

B). Use meaningful and descriptive names

C). Use reserved keywords as identifiers

D). Use Unicode characters in identifiers

What is the purpose of following naming conventions for identifiers?

A). Improve code performance

B). Enhance code readability and maintainability

C). Ensure cross-browser compatibility

D). Reduce code size

Which of the following is a valid JavaScript identifier?

A). user-name

B). 2users

C). _user

D). user name

What is the significance of using meaningful names for identifiers?

A). Improve code efficiency

B). Make the code shorter

C). Enhance code readability

D). Ensure code security

Which of the following is not a valid JavaScript identifier?

A). first_name

B). $2users

C). break

D). myVar

What is the correct spelling for the naming convention starting with uppercase for each word?

A). Pascal_Case

B). pascalcase

C). pascalCase

D). PascalCase

Which naming convention uses hyphens to separate words?

A). CamelCase

B). snake_case

C). Kebab-Case

D). PascalCase

What is the correct way to represent a constant in JavaScript?

A). CONSTANT_VALUE

B). constantValue

C). const_value

D). ConstValue

Which naming convention separates words with underscores?

A). camelCase

B). PascalCase

C). snake_case

D). kebab-case

What does the term 'case-sensitive' mean for identifiers in JavaScript?

A). Identifiers can have uppercase and lowercase letters interchangeably

B). Identifiers must have consistent capitalization throughout the code

C). Identifiers are not sensitive to case differences

D). Identifiers are sensitive to differences in uppercase and lowercase letters