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 undefined in JavaScript?
A). String
B). Undefined
C). Null
D). Object
What will be the output of typeof NaN in JavaScript?
A). String
B). Number
C). NaN
D). Undefined
What will be the output of typeof {} in JavaScript?
A). Object
B). Null
C). Undefined
D). Boolean
What is the data type of the value true in JavaScript?
A). Boolean
B). String
C). Number
D). Undefined
What is the data type of the value Infinity in JavaScript?
A). Number
B). String
C). Boolean
D). Null
Which data type is used to represent the absence of a value in JavaScript?
A). Null
B). Undefined
C). NaN
D). Boolean
What will the data type of the variable name be if it is assigned the value 'John Doe'?
A). Number
B). String
C). Boolean
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
Which of the following is not a valid JavaScript data type?
A). Integer
B). Object
C). Symbol
D). NaN