How does block scope help prevent variable hoisting issues?

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

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 happens if you try to access a block-scoped variable outside its block?

A). The variable is accessible globally

B). The variable is accessible within its block

C). An error occurs

D). The variable is accessible within a function

How can you ensure variable immutability within a block?

A). Declare the variable with var

B). Declare the variable with let

C). Declare the variable with const

D). Assign a default value

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

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 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

How does block scope affect the visibility of variables in nested blocks?

A). Variables are only visible within their immediate block

B). Variables are visible within all nested blocks

C). Variables are only visible within functions

D). Variables are globally visible