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