Which symbol is used to denote a comment in JavaScript?
A). //
B). --
C). #
D). /* ... */
Which of the following is not a valid JavaScript data type?
A). Integer
B). Object
C). Symbol
D). NaN
What will be the output of typeof undefined in JavaScript?
A). String
B). Undefined
C). Null
D). Object
Which data type is used to represent a list of elements in JavaScript?
A). List
B). Array
C). Tuple
D). Set
What is the data type of the value null in JavaScript?
A). Object
B). String
C). Null
D). Undefined
What is the data type of the value true in JavaScript?
A). Boolean
B). String
C). Number
D). Undefined
Which data type is used to represent a unique identifier in JavaScript?
A). Identifier
B). Key
C). Object
D). Symbol
What will be the output of typeof NaN in JavaScript?
A). String
B). Number
C). NaN
D). Undefined
What will be the data type of the result when dividing a number by zero in JavaScript?
A). Infinity
B). NaN
C). Undefined
D). Null
What is the data type of the value 'null' (as a string) in JavaScript?
A). Object
B). String
C). Null
D). Undefined