Advanced Functions

What is the main advantage of using 'let' over 'var' in JavaScript?

• It provides block scope, reducing variable conflicts.

• It allows redeclaration of variables.

• It automatically hoists variables to the top.

• It is faster in execution.

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How does a closure benefit JavaScript programming?

• It allows variables to be accessed globally.

• It enables data encapsulation and private variables.

• It speeds up code execution.

• It simplifies syntax.

What happens during the hoisting process in JavaScript?

• Functions are deleted after execution.

• Variables and functions are executed immediately.

• Declarations are moved to the top of their scope.

• All variables are converted to 'let'.

What is the purpose of an Immediately Invoked Function Expression (IIFE)?

• To delay function execution.

• To create global variables.

• To run code immediately and isolate it from the global scope.

• To simplify function syntax.

What is a key feature of arrow functions in JavaScript?

• They are slower than regular functions.

• They cannot be used with arrays.

• They have a different way of handling the 'this' keyword.

• They require more typing.