2025 Model questions Advanced 32

a) Describe what is meant by an HTML event.

Answer explanation

Correct: HTML events are actions that occur in the browser, often triggered by user interactions like clicks or key presses.

Incorrect: Any explanation that does not mention user interactions or browser actions.

• User Interactions
  HTML events are actions triggered by user interactions, such as clicking a button, pressing a key, or moving the mouse.

• Browser Actions
  These events also include browser actions like page loading or resizing, which can trigger functions in the web page.

b)Describe the action that causes each of the following HTML event to start.

i) onmouseover()

ii) onmouseout()

iii)onload()

Answer explanation

Correct

if the student describes:

i) onmouseover() starts when the mouse pointer is over an element,

ii) onmouseout() starts when the mouse pointer leaves an element,

iii) onload() starts when a page or an image is fully loaded.

or

i) onmouseover()
This event starts when the mouse pointer enters or hovers over an element.

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ii) onmouseout()
This event starts when the mouse pointer leaves or moves away from an element.

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iii) onload()
This event starts when a web page or an image has fully loaded in the browser.

a)Describe the architecture of peer-to-peer networks.

Answer explanation

Correct if it describes a decentralized network where each node (peer) acts as both client and server, sharing resources directly without a central server.

Incorrect if it describes a client-server model or omits key peer-to-peer characteristics.

a) Architecture of Peer-to-Peer Networks (2 points)

1. Decentralized Structure – Each computer (peer) acts as both a client and a server, sharing resources directly without a central server.

2. Direct Communication – Files and data are exchanged directly between devices on the network.

b) Describe the benefits and drawbacks of peer-to-peer networks.

Answer explanation

The answer should mention benefits like cost-effectiveness, scalability, and resilience, and drawbacks like security risks, lack of centralized management, and potential for uneven resource distribution.

If these points are covered, the answer is correct.

b) Benefits and Drawbacks of Peer-to-Peer Networks (6 points)

Benefits:
3. Cost-Effective – No need for expensive central servers.
4. Easy to Set Up – Simple configuration and no central administration needed.
5. Efficient File Sharing – Ideal for sharing files quickly across connected devices.

Drawbacks:
6. Security Risks – Harder to control access and secure data.
7. No Central Backup – Data can be lost if individual peers fail.
8. Performance Issues – Slower performance as the number of users increases or if some peers are unreliable.

a) describe what is meant by a virtual server.

Answer explanation

The answer should explain that a virtual server is a software-based environment that emulates a physical server, allowing multiple virtual servers to run on a single physical machine, sharing resources like CPU and memory.

b) Describe a server farm.

Answer explanation

Correct if the answer explains a server farm as a group of networked servers used for large-scale computing tasks, providing redundancy, load balancing, and scalability.

• Group of Networked Virtual Servers
  A virtual server farm is a collection of virtual servers running on physical hardware, managed together to provide scalable computing power and storage.

• Used for Hosting and Data Processing
  They are commonly used to host websites, run applications, and perform large-scale data processing tasks efficiently.

c) describe one benefit to a company of using virtual servers.

Answer explanation

Correct: The answer should mention a benefit such as cost savings, scalability, or resource efficiency.

Incorrect: The answer does not mention any specific benefit of using virtual servers.

d) Describe one drawback to a company of using virtual servers.

Answer explanation

Correct if the answer identifies a drawback such as potential security vulnerabilities, performance issues, or complexity in management.

or

One drawback of using virtual servers is the potential for security vulnerabilities, as multiple virtual machines share the same physical hardware, making it easier for a security breach in one VM to affect others if not properly isolated.

Incorrect if it does not address a specific drawback of virtual servers.

a)Describe what is meant by a frame in a computer animation.

Answer explanation

Correct: A frame in computer animation is a single image in a sequence that, when displayed in rapid succession, creates the illusion of motion.

Incorrect: Any description that does not convey the concept of sequential images creating motion.

b) Explain how changes in the frame rate can affect how objects appear to move.

Answer explanation

Correct if it explains that higher frame rates make motion smoother and more realistic, while lower frame rates can cause choppy or jerky movements, affecting the perception of speed and fluidity.