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
What does the following code do: var $ = 5;
A). Throws an error
B). Creates a variable named $
C). Creates a variable named var
D). None of the above
What is the output of the following code: var x = 5, x = 10;
A). Syntax error
B). 5
C). 10
D). Reference error
What will the following code output: var x; x = 5; var y = x;
A). undefined
B). null
C). 5
D). x
Which characters are allowed in JavaScript identifiers?
A). Letters only
B). Letters and numbers only
C). Letters, numbers, $ and _
D). Any special characters
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 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
Which of these is an invalid identifier?
A). foo_bar
B). fooBar
C). foo-bar
D). foo$bar
What is the maximum length of an identifier?
A). 255 characters
B). 31 characters
C). 64 characters
D). No limit