Which of the following is a valid JavaScript variable name?
A). $varName
B). first_name
C).
D). _variable
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
Which of the following is not a valid JavaScript identifier?
A). my_var
B). $amount
C). const
D). variable1
What is the correct way to represent the identifier 'improveCode' using camelCase?
A). improveCode
B). Improve-Code
C). IMPROVECODE
D). improve_code
Which of the following is not a valid JavaScript identifier?
A). first_name
B). $2users
C). break
D). myVar
Which of the following is not a valid JavaScript variable name?
A). $varName
B). first_name
C).
D). _variable
What is the naming convention that starts with a lowercase letter and each subsequent word starts with a capital letter?
A). camelCase
B). Snake_Case
C). kebab-case
D). PascalCase
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
What is the correct way to represent a constant in JavaScript?
A). CONSTANT_VALUE
B). constantValue
C). const_value
D). ConstValue
What is the role of reserved keywords in JavaScript identifiers?
A). Can be used as identifiers without issues
B). Cannot be used as identifiers
C). Enhance code performance
D). Ensure code security