7th Seoul - 2nd Cycle Exam

What does JavaScript do in a webpage?

• Structures content

• Styles content

• Makes the webpage interactive

• Stores data in a database

Answer explanation

JavaScript primarily makes webpages interactive by enabling dynamic content updates, user interactions, and real-time responses, enhancing the overall user experience. It does not structure or style content directly.

Which tag is used to include JavaScript in an HTML document?

• <script>

• <js>

• <javascript>

• <code>

Answer explanation

<script> is the tag that can be used on declaring JavaScript

Where can JavaScript be written in an HTML file?

• Inside the tag

• Inside the tag

• Both and tags

• Only in an external file

Answer explanation

JavaScript can be included in both the and tags of an HTML file. This allows for scripts to be loaded before or after the content, providing flexibility in how and when the scripts are executed.

Which of the following is NOT a use of JavaScript?

• Form validation

• Adding animations

• Designing a webpage layout

• Fetching data from a server

Answer explanation

JavaScript is primarily used for dynamic functionalities like form validation, animations, and fetching data. However, designing a webpage layout is typically done with HTML and CSS, not JavaScript.

What is the correct way to display an alert box in JavaScript?

• alertBox("Hello");

• message("Hello");

• alert("Hello");

• display("Hello");

Answer explanation

The correct way to display an alert box in JavaScript is by using the alert() function. Therefore, alert("Hello"); is the right choice, as it triggers a pop-up alert with the specified message.

Which method writes content to an HTML document?

• document.write()

• document.log()

• write.document()

• write.log()

Answer explanation

The correct method to write content to an HTML document is document.write(). The other options, document.log(), write.document(), and write.log(), are not valid JavaScript methods for this purpose.

How do you log information to the console?

• console.log("Hello");

• log.console("Hello");

• output.console("Hello");

• display.log("Hello");

Answer explanation

The correct way to log information to the console in JavaScript is using console.log("Hello"). The other options are incorrect as they do not use the proper syntax for logging.

Which method can change the content of an HTML element?

• element.innerHTML

• element.innerText

• element.changeHTML

• element.writeText

Answer explanation

The correct method to change the content of an HTML element is element.innerHTML. This property allows you to set or get the HTML markup contained within the element, effectively changing its content.

JavaScript code is written as a series of:

• Tags

• Statements

• Variables

• Loops

Answer explanation

JavaScript code is primarily composed of statements, which are instructions that the browser executes. While variables and loops are components of statements, the correct term for the overall structure is 'statements'.

How should JavaScript statements end?

• With a semicolon (;)

• With a colon (:)

• With a period (.)

• With a comma (,)

Answer explanation

JavaScript statements should end with a semicolon (;). This helps to clearly define the end of a statement, preventing potential errors in code execution. Other options like colon, period, and comma are not valid for statement termination.