Answer & Solution
Answer: Option B
Solution:
let is a reserved word and cannot be used as an identifier.
Q
Is let a valid identifier in JavaScript?
Related Questions on Average
Are JavaScript identifiers case-sensitive?
A). Yes
B). No
C). Only in ES6
D). Only in strict mode
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
Can identifiers start with a digit in JavaScript?
A). Yes
B). No
C). Only in ES5
D). Only in strict mode
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 maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit
What is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var
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 is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
Which of the following is a valid identifier?
A). if
B). else
C). null
D). value1