Review Lesson 15

What is JavaScript primarily used for?

• Designing web layouts

• Creating static content on websites

• Adding interactivity and dynamic behavior to websites

• Managing databases

Which of the following is the correct way to include JavaScript internally in an HTML file?

• <script type = text/javascript>

• <script> <javascript>

• <javascript>

• <script> javascript </script>

What does the following code do?

alert("Welcome to the website!");

• Displays a pop-up message with "Welcome to the website!"

• Writes "Welcome to the website!" on the webpage

• Logs "Welcome to the website!" to the console

• Changes the title of the webpage

What will this code do?

• Opens a dialog box displaying "Hello, world!"

• Writes "Hello, world!" on the webpage

• Outputs "Hello, world!" to the browser console

• Replaces the webpage content with "Hello, world!"

Which is the correct way to declare a variable in JavaScript?

• variable x = 10;

• var x = 10;

• declare x = 10;

• let x == 10;

What will this code output?

let name = "John";

let age = 25;

document.write("Name: " + name + ", Age: " + age);

• Name: , Age:

• Name: John, Age: 25

• John25

• Name + name, Age + age

What is the difference between alert() and document.write()?

• alert() writes on the webpage, while document.write() shows a pop-up

• alert() shows a pop-up, while document.write() writes on the webpage

• Both do the same thing

• alert() works offline, and document.write() works online

What will this code do?

• Writes "Welcome!" as plain text on the webpage

• Writes "Welcome!" inside an <h1> element on the webpage

• Creates a pop-up with "Welcome!"

• Logs "<h1>Welcome!</h1>" in the console

What happens when this code is executed?

alert("JavaScript is awesome!");

• Displays "JavaScript is awesome!" on the webpage

• Shows a pop-up with "JavaScript is awesome!"

• Logs "JavaScript is awesome!" in the console

• Displays an error

What will this code output on the webpage?

document.write("Welcome to JavaScript coding!");

• Displays "Welcome to JavaScript coding!" as plain text on the webpage

• Displays "Welcome to JavaScript coding!" in a pop-up

• Replaces the current webpage with "Welcome to JavaScript coding!"

• Shows an error