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 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
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
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
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 identifiers start with a digit in JavaScript?
A). Yes
B). No
C). Only in ES5
D). Only in strict mode
What will happen if you declare a variable with the name undefined?
A). Syntax error
B). Declares a variable
C). Throws a runtime error
D). Reassigns undefined
Which of the following is an invalid identifier?
A). _variable
B). var$
C). 2variable
D). variable2
Which identifier is valid in strict mode?
A). public
B). _public
C). 123public
D). public$
Is let a valid identifier in JavaScript?
A). Yes
B). No
C). Only in ES6
D). Only in non-strict mode