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
What will be the result of using a reserved word as an identifier?
A). No error
B). Syntax error
C). Logical error
D). Runtime error
Can JavaScript identifiers include spaces?
A). Yes
B). No
C). Only in ES6
D). Only in strings
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
What is the output of the following code: var x = 5, x = 10;
A). Syntax error
B). 5
C). 10
D). Reference error
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6
What will the following code output: var x; x = 5; var y = x;
A). undefined
B). null
C). 5
D). x
Which of the following is a valid identifier name?
A). var
B). 123abc
C). _123abc
D). #abc123
What does the following code do: var $ = 5;
A). Throws an error
B). Creates a variable named $
C). Creates a variable named var
D). None of the above
Which of the following is an invalid identifier?
A). _variable
B). var$
C). 2variable
D). variable2