Which data type is used to represent the absence of a value in JavaScript?
A). Null
B). Undefined
C). NaN
D). Boolean
Which of the following is not a valid JavaScript variable name according to naming conventions?
A). myVariable
B). _myVariable
C). 2ndVariable
D). MyVariable
Which of the following is a valid JavaScript data type for representing text?
A). Text
B). Character
C). String
D). Sentence
Which symbol is used to denote a comment in JavaScript?
A). //
B). --
C). #
D). /* ... */
What will be the output of typeof NaN in JavaScript?
A). String
B). Number
C). NaN
D). Undefined
What data type is used to represent a collection of key-value pairs in JavaScript?
A). Object
B). Array
C). Map
D). Set
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 list of elements in JavaScript?
A). List
B). Array
C). Tuple
D). Set
What is the data type of the value Infinity in JavaScript?
A). Number
B). String
C). Boolean
D). Null
What is the data type of the value 'null' (as a string) in JavaScript?
A). Object
B). String
C). Null
D). Undefined