Answer & Solution
Answer: Option B
Solution:
$ is a valid identifier, and this code creates a variable named $.
Q
What does the following code do: var $ = 5;
Related Questions on Average
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6
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
What will the following code output: var x; x = 5; var y = x;
A). undefined
B). null
C). 5
D). x
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
What is the output of the following code: var x = 5, x = 10;
A). Syntax error
B). 5
C). 10
D). Reference error
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
Can JavaScript identifiers include spaces?
A). Yes
B). No
C). Only in ES6
D). Only in strings
Which of the following is an invalid identifier?
A). _variable
B). var$
C). 2variable
D). variable2
Which characters are allowed in JavaScript identifiers?
A). Letters only
B). Letters and numbers only
C). Letters, numbers, $ and _
D). Any special characters
Which of the following is a valid identifier name?
A). var
B). 123abc
C). _123abc
D). #abc123