Q
What does the following code do: var $ = 5;

Answer & Solution

Answer: Option B
Solution:
$ is a valid identifier, and this code creates a variable named $.
Related Questions on Average

Can identifiers start with a digit in JavaScript?

A). Yes

B). No

C). Only in ES5

D). Only in strict mode

Which is a correct identifier for a variable?

A). 9variable

B). variable-9

C). variable_9

D). variable 9

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

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?

A). if

B). else

C). null

D). value1

What will the following code output: var x; x = 5; var y = x;

A). undefined

B). null

C). 5

D). x

What is a valid identifier in JavaScript?

A). 123abc

B). abc123

C). let

D). var

Is let a valid identifier in JavaScript?

A). Yes

B). No

C). Only in ES6

D). Only in non-strict mode

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$