Answer & Solution
Answer: Option D
Solution:
value1 is a valid identifier, while if, else, and null are reserved words.
Q
Which of the following is a valid identifier?
Related Questions on Average
Which of the following is a reserved word in JavaScript?
A). myVariable
B). function
C). let
D). number
Can identifiers start with a digit in JavaScript?
A). Yes
B). No
C). Only in ES5
D). Only in strict mode
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
Are JavaScript identifiers case-sensitive?
A). Yes
B). No
C). Only in ES6
D). Only in strict mode
Which of the following is an invalid identifier?
A). _variable
B). var$
C). 2variable
D). variable2
Can JavaScript identifiers include spaces?
A). Yes
B). No
C). Only in ES6
D). Only in strings
Which of the following is a valid identifier name?
A). var
B). 123abc
C). _123abc
D). #abc123
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
What is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var