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 output of '5' + 3?
A). 8
B). 53
C). 8
D). Error
What will typeof [1, 2, 3] return?
A). array
B). object
C). number
D). list
What is the data type of an array in JavaScript?
A). Array
B). Object
C). Collection
D). List
Which symbol is used to denote a string template literal?
A). ''
B).
C). ``
D). {}
What will typeof NaN return?
A). number
B). NaN
C). undefined
D). object
Which function can convert a number to a string in JavaScript?
A). toString()
B). parseInt()
C). String()
D). Number()
What is the output of typeof null?
A). null
B). undefined
C). object
D). number
What is the output of '5' - 3?
A). 2
B). 2
C). 53
D). Error
Which of the following is not a primitive data type in JavaScript?
A). String
B). Number
C). Object
D). Boolean