Can const be used for objects and arrays?

Which keyword should be used for a variable that might be reassigned?

A). const

B). let

C). var

D). function

Can a let variable be redeclared in the same scope?

A). Yes

B). No

C). Only if it is a string

D). Only if it is a number

What is the scope of a variable declared with let?

A). Global

B). Function

C). Block

D). Object

What is the temporal dead zone in ES6?

A). Time between function calls

B). Period between variable declaration and initialization

C). Time between two loops

D). Interval between event listeners

What happens if you try to access a let variable before its declaration?

A). Returns undefined

B). Throws a ReferenceError

C). Returns null

D). Returns an empty string

Can a const variable be declared without an initial value?

A). Yes

B). No

C). Only in strict mode

D). Only if it is an object

What is the primary difference between var and let?

A). Scope

B). Initialization

C). Data type

D). Assignment

Are variables declared with let and const accessible before they are declared?

A). Yes

B). No

C). Only in strict mode

D). Only if they are numbers

What is the output of the following code: let z = 3; z = 5; console.log(z);?

A). 3

B). 5

C). undefined

D). ReferenceError

Which keyword allows block-level scope in ES6?

A). var

B). let

C). function

D). var and function