What error will the following code produce: const PI; PI = 3.14;?

What is the value of a const variable once it is assigned?

A). Can be changed later

B). Cannot be changed later

C). Depends on the data type

D). Undefined initially

What is the scope of a variable declared with let?

A). Global

B). Function

C). Block

D). Object

Which keyword is used to declare a read-only named constant?

A). let

B). var

C). const

D). static

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

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 variable declared with let be hoisted?

A). Yes, partially

B). No

C). Yes, fully

D). Only in strict mode

What is the primary difference between var and let?

A). Scope

B). Initialization

C). Data type

D). Assignment