Modern Web Design with HTML5, CSS3, and JavaScript - JavaScript Function - Expression versus Function Declaration with E

The video tutorial explains the differences between function declarations and function expressions in JavaScript. Function declarations are hoisted, allowing them to be called before they are defined, while function expressions are not. The tutorial provides examples of both, highlighting the importance of initialization order for expressions. It also discusses reassigning function values and type checking. A challenge is presented to create both types of functions that perform the same task, reinforcing the concepts covered.

What is a unique feature of function expressions compared to function declarations?

• They cannot be assigned to variables.

• They can be hoisted.

• They must have a name.

• They can be anonymous.

Why can function declarations be called before they are defined?

• Because they are executed immediately.

• Because they are part of the global scope.

• Because they are hoisted to the top of the code.

• Because they are stored in a special memory.

What happens if you try to use a function expression before it is defined?

• It will return undefined.

• It will throw an error.

• It will execute with default values.

• It will behave like a function declaration.

In the example provided, what is the result of calling the function declaration with a value of 100?

• It returns 10000.

• It throws an error.

• It returns undefined.

• It returns 100.

What is the correct order of operations when using a function expression?

• Define the function, then use it.

• Use the function, then define it.

• Define the function and use it simultaneously.

• It doesn't matter; both orders work.

What is the expected output when both the function declaration and expression are executed with the same input?

• Different results due to different scopes.

• The same result as they perform the same operation.

• An error due to conflicting names.

• Undefined for the function expression.

What is the challenge presented to the viewer in the final section?

• To create a function that returns a string.

• To create a function that calculates the square of a number.

• To create both a function declaration and expression that perform the same task.

• To create a function that throws an error.