What will be the result of the following code: let z = "123"; z = Number(z); console.log(typeof z);?

What is the result of typeof [] in JavaScript?

A). array

B). object

C). list

D). undefined

What does the parseInt function do in JavaScript?

A). Converts a number to a string

B). Converts a string to an integer

C). Converts a boolean to a number

D). Converts an array to a number

What is the type of the value returned by parseFloat('3.14abc')?

A). number

B). string

C). NaN

D). undefined

What does it mean that JavaScript is dynamically typed?

A). Variables do not have types

B). Variables can change type

C). Variables must be declared with a type

D). Variables cannot change type

What is the type of the value returned by JSON.parse('null')?

A). null

B). string

C). object

D). undefined

What happens when you add a number and a string in JavaScript?

A). An error is thrown

B). The number is converted to a string

C). The string is converted to a number

D). Both are converted to boolean

What will typeof null return in JavaScript?

A). null

B). undefined

C). object

D). number

What does the isNaN function do?

A). Checks if a value is not a number

B). Converts a value to a number

C). Checks if a value is a number

D). Converts a value to NaN

Which type conversion happens automatically in the expression 3 + '5'?

A). Number to String

B). String to Number

C). Boolean to String

D). Number to Boolean

What will typeof NaN return in JavaScript?

A). number

B). NaN

C). undefined

D). object