Answer & Solution
Answer: Option C
Solution:
The identifier '_user' is valid as it starts with an underscore.
Q
Which of the following is a valid JavaScript identifier?
Related Questions on Average
Which of the following is a valid JavaScript variable name?
A). $varName
B). first_name
C).
D). _variable
Which of the following is not 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
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
What is the correct spelling for the naming convention starting with uppercase for each word?
A). Pascal_Case
B). pascalcase
C). pascalCase
D). PascalCase
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
Which of the following is not a valid JavaScript identifier?
A). my_var
B). $amount
C). const
D). variable1
Which of the following is not a valid identifier naming convention?
A). camelCase
B). snake_case
C). dash-case
D). PascalCase
What is the correct way to represent a constant in JavaScript?
A). CONSTANT_VALUE
B). constantValue
C). const_value
D). ConstValue