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
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
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 will be the result of using a reserved word as an identifier?
A). No error
B). Syntax error
C). Logical error
D). Runtime error
Which of the following is a reserved word in JavaScript?
A). myVariable
B). function
C). let
D). number
Can identifiers start with a digit in JavaScript?
A). Yes
B). No
C). Only in ES5
D). Only in strict mode
Are JavaScript identifiers case-sensitive?
A). Yes
B). No
C). Only in ES6
D). Only in strict mode