What will happen when you try to execute this code?

What will be the output of the code above?

A). 30

B). 31

C). Error

D). Undefined

What is the primary distinction between const and let in JavaScript?

A). const variables are immutable

B). let variables are block-scoped

C). const variables have function scope

D). let variables can be reassigned

What will be the output of the code above?

A). 10

B). 20

C). Error

D). Undefined

Which of the following statements is true about constants declared using const?

A). They can be reassigned multiple times

B). They are hoisted to the top

C). They are mutable

D). They are immutable

In JavaScript, const variables are not hoiste What does this mean?

A). They are hoisted to the top of the block

B). They cannot be used before declaration

C). They are accessible in nested scopes

D). They are block-scoped variables

Which of the following statements is true about block scope in JavaScript?

A). Variables declared with let have global scope

B). Variables declared with let have function scope

C). Variables declared with let are block-scoped

D). Variables declared with let are hoisted

What happens if you try to reassign a value to a constant declared using const?

A). SyntaxError

B). TypeError

C). ReferenceError

D). No error, value is reassigned

What is the primary advantage of using block scope in JavaScript?

A). Reducing code size

B). Preventing variable hoisting

C). Avoiding global variables

D). Improving performance

What will be the output of the code above?

A). 30

B). 31

C). TypeError

D). Undefined

Which of the following statements about const is true?

A). Variables declared with const can be reassigned

B). const variables have function scope

C). const variables cannot be used in loops

D). const variables are block-scoped