What is the result of typeof undefined?
A). undefined
B). null
C). object
D). number
Which operator checks both value and type for equality in JavaScript?
A). ==
B). !=
C). ===
D). !==
How do you declare a variable with an undefined value?
A). let x;
B). let x = '';
C). let x = 0;
D). let x = null;
What is the result of null == undefined?
A). 1
B). 0
C). Error
D). NaN
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
What is the result of null === undefined?
A). 1
B). 0
C). Error
D). NaN
What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
What is the data type of 42 in JavaScript?
A). String
B). Boolean
C). Number
D). Object
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list