Which identifier is valid in strict mode?
A). public
B). _public
C). 123public
D). public$
Can JavaScript identifiers include spaces?
A). Yes
B). No
C). Only in ES6
D). Only in strings
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
Are JavaScript identifiers case-sensitive?
A). Yes
B). No
C). Only in ES6
D). Only in strict mode
Which of these is an invalid identifier?
A). foo_bar
B). fooBar
C). foo-bar
D). foo$bar
Is let a valid identifier in JavaScript?
A). Yes
B). No
C). Only in ES6
D). Only in non-strict mode
Can an identifier be a single character?
A). Yes
B). No
C). Only in ES5
D). Only in ES6
What is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var
Which of the following is a valid identifier?
A). if
B). else
C). null
D). value1