What happens when you declare a constant with const inside a block and try to reassign it?

What is the output of console.log(blockVar); outside a block if let blockVar = 'Block'; is declared inside a block?

A). Block

B). undefined

C). Error

D). null

What is block scope in JavaScript?

A). Variables scoped globally

B). Variables scoped within a function

C). Variables scoped to a block

D). Variables scoped to an object

What is the output of console.log(i); outside the loop if let i = 10; is declared inside a loop?

A). 10

B). undefined

C). Error

D). 0

Which keyword introduces block-scoped variables in JavaScript?

A). var

B). let

C). const

D). function

What is hoisting in JavaScript?

A). Moving variables to the top of their function or global scope

B). Making variables undefined

C). Creating new variables

D). None of the above

Which of the following correctly defines a block scope?

A). A scope that encompasses the entire codebase

B). A scope that encompasses a function

C). A scope that encompasses a block of code delimited by curly braces

D). A scope that encompasses an object

What is lexical scoping in JavaScript?

A). Variables scoped to the entire codebase

B). Variables scoped to their functions

C). Variables scoped based on their position in the code

D). Variables scoped based on their names

What does the Temporal Dead Zone (TDZ) refer to?

A). A zone with no variables

B). A zone where variables are in memory but not accessible

C). A zone where variables are accessible globally

D). A zone with limited variable scope

What is the purpose of block scope in JavaScript?

A). To limit the visibility and accessibility of variables

B). To make variables global

C). To create constants

D). To execute functions

What is the benefit of block scope in JavaScript?

A). It reduces variable conflicts

B). It increases global scope

C). It simplifies variable declarations

D). It makes variables inaccessible