How does block scope help prevent variable hoisting issues?

What is the output of console.log(innerVar); outside exampleFunction if let innerVar = 'Hello'; is declared inside exampleFunction?

A). Hello

B). undefined

C). Error

D). null

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 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

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 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

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(outerVar); outside outerFunction if let outerVar = 'Outer'; is declared inside outerFunction?

A). Outer

B). undefined

C). Error

D). null

What is the main difference between var and let in terms of scope?

A). var is block-scoped, let is function-scoped

B). var is function-scoped, let is block-scoped

C). Both var and let are block-scoped

D). Both var and let are function-scoped

How can you access a variable declared in an inner block from an outer block?

A). Using the var keyword

B). Using the let keyword

C). Using the const keyword

D). Using the this keyword

What is the benefit of block scope in loops?

A). It allows variables to be reassigned within each iteration

B). It prevents variable hoisting

C). It restricts variables to the loop block

D). It makes variables globally accessible