Which of the following is a valid identifier name?
A). var
B). 123abc
C). _123abc
D). #abc123
Are JavaScript identifiers case-sensitive?
A). Yes
B). No
C). Only in ES6
D). Only in strict mode
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
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 identifier is valid in strict mode?
A). public
B). _public
C). 123public
D). public$
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
Can identifiers start with a digit in JavaScript?
A). Yes
B). No
C). Only in ES5
D). Only in strict mode
Which of the following is a valid identifier?
A). if
B). else
C). null
D). value1
What is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var