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
Which of the following is an invalid identifier?
A). _variable
B). var$
C). 2variable
D). variable2
Which of the following is a valid identifier name?
A). var
B). 123abc
C). _123abc
D). #abc123
Which of the following is a valid identifier?
A). if
B). else
C). null
D). value1
Which of these is an invalid identifier?
A). foo_bar
B). fooBar
C). foo-bar
D). foo$bar
What is a valid identifier in JavaScript?
A). 123abc
B). abc123
C). let
D). var
Which is a correct identifier for a variable?
A). 9variable
B). variable-9
C). variable_9
D). variable 9
What will be the result of using a reserved word as an identifier?
A). No error
B). Syntax error
C). Logical error
D). Runtime error
What will the following code output: var x; x = 5; var y = x;
A). undefined
B). null
C). 5
D). x
Which identifier is valid in strict mode?
A). public
B). _public
C). 123public
D). public$
What is the output of the following code: var x = 5, x = 10;
A). Syntax error
B). 5
C). 10
D). Reference error