What is the result of typeof undefined?

Which of the following is a falsy value in JavaScript?

A). 0

B).

C). null

D). All of the above

What is the output of typeof null?

A). null

B). undefined

C). object

D). number

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 will typeof [1, 2, 3] return?

A). array

B). object

C). number

D). list

What will typeof NaN return?

A). number

B). NaN

C). undefined

D). object

What is the output of '5' + 3?

A). 8

B). 53

C). 8

D). Error

Which method can be used to convert a string to a number in JavaScript?

A). parseInt()

B). toString()

C). toNumber()

D). parseStr()

Which of the following is not a primitive data type in JavaScript?

A). String

B). Number

C). Object

D). Boolean

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). {}