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
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
Which identifier is valid in strict mode?
A). public
B). _public
C). 123public
D). public$
Which of the following is a reserved word in JavaScript?
A). myVariable
B). function
C). let
D). number
Which of these is an invalid identifier?
A). foo_bar
B). fooBar
C). foo-bar
D). foo$bar
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 is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var
Which characters are allowed in JavaScript identifiers?
A). Letters only
B). Letters and numbers only
C). Letters, numbers, $ and _
D). Any special characters
Can JavaScript identifiers include spaces?
A). Yes
B). No
C). Only in ES6
D). Only in strings
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6