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COMPUTER STUDIES
01-10: ADADDBBBCC
11-20: CDBDCBDACD
21-30: DEAECBBEAA
31-40: EDACDBACAC
41-50: ADDADBEBAB
51-60: AEEEAECACE
COMPLETED
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(1)
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(2a)
TABULATES
=Mainframe Computer=
(i) Size: Large, often requiring specialized rooms or data centers.
(ii) Speed: Moderate to high processing speed, optimized for handling large volumes of data and transactions.
=Mini Computer=
(i) Size: Smaller than mainframes but larger than microcomputers.
(ii) Speed: Moderate processing speed suitable for small to medium-scale tasks.
=Super Computer=
(i) Size: Varies, can be large clusters of servers or specialized hardware.
(ii) Speed: Extremely high processing speed, designed for complex computations and simulations.
(2aii)
File organization refers to the way files are structured and stored on a computer or storage device. It includes the hierarchy of folders, directories, and subdirectories that help to categorize and locate files efficiently.
(2bi)
(i) Static websites have fixed content that doesn’t change, whereas dynamic websites have content that is generated dynamically and can change frequently.
(ii) Static websites do not allow user interaction, whereas dynamic websites allow users to interact with the website and its content.
(2bii)
(i) HTTP (Hypertext Transfer Protocol)
(ii) FTP (File Transfer Protocol)
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(3ai)
The instruction cycle, also known as the machine cycle, is the basic operation performed by a computer’s central processing unit (CPU) to execute each instruction. It consists of the following steps ; Fetch, decode and execute.
(3aii)
(i) Efficient transaction processing: POS machines streamline transactions, reducing processing time and improving customer experience.
(ii) Accurate sales tracking: POS machines provide real-time sales data, helping businesses track inventory, sales trends, and revenue.
(3aiii)
(i) Complexity: Flowcharts can become cluttered and difficult to read as the process becomes more complex.
(ii) Limited scalability: Flowcharts are not ideal for representing large, intricate systems or processes.
(3bi)
35F₁₀ = 3 × 16² + 5 × 16¹ + 15 × 16⁰
= 3 × 256 + 5 × 16 + 15
= 768 + 80 + 15
= 863₁₀
(3bii)
(i) Adobe Dreamweaver
(ii) WordPress
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(4a)
(i) Videoconference:
Videoconferencing allows people in different locations to hold face-to-face meetings without having to move to a single location physically. It is widely used for business meetings, distance education, and medical consultations. Participants can see and hear each other in real-time through video and audio communication, share documents, and collaborate effectively.
(ii) Telepresence:
Telepresence refers to technologies that allow a person to feel as if they were present at a location other than their true location. It often involves sophisticated video conferencing equipment that provides high-definition video and audio, making it seem like participants are in the same room. Telepresence aims to create a more immersive and realistic interaction, enhancing remote communication.
(iii) Teleconference:
Teleconferencing is a telephone meeting among two or more participants involving technology more sophisticated than a simple two-way phone connection. It may involve audio, video, and data sharing. Teleconferencing is used for business meetings, training sessions, and seminars, enabling people to connect and collaborate without the need for physical travel.
(4b)
10 LET sum = 0
20 FOR i = 11 TO 50 STEP 2
30 LET sum = sum + i
40 NEXT i
50 PRINT “The sum of odd numbers from 11 to 50 is “; sum
60 END
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(5ai)
Primary source of data:
(i)Original and firsthand information
(ii)Collected directly from the source
(iii)Examples: surveys, experiments, observations, interviews
Secondary source of data:
(i)Information that has been processed, analyzed, and interpreted by others
(ii)Collected from existing sources
(iii)Examples: books, articles, research papers, databases
(5aii)
(i)Productivity software (e.g. Microsoft Office, Google Docs)
(ii)Graphics and multimedia software (e.g. Adobe Photoshop, Adobe Premiere)
(iii)Games and entertainment software (e.g. video games, simulation software)
(iv)Educational software (e.g. language learning apps, online course platforms)
(5bi)
Truth table for a four-input NAND gate:
| A | B | C | D | Output |
| — | — | — | — | — |
| 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 0 | 1 | 1 |
| 0 | 0 | 1 | 0 | 1 |
| 0 | 0 | 1 | 1 | 1 |
| 0 | 1 | 0 | 0 | 1 |
| 0 | 1 | 0 | 1 | 1 |
| 0 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 1 | 1 |
| 1 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 1 | 1 |
| 1 | 0 | 1 | 0 | 1 |
| 1 | 0 | 1 | 1 | 1 |
| 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 0 | 1 | 1 |
| 1 | 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 | 0 |
(5bii)
(i)Arithmetic functions: performs mathematical operations such as addition, subtraction, multiplication, and division.
(ii)Logical functions: performs logical operations such as AND, OR, NOT, and XOR.
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(6a)
(i)Register: A small amount of on-chip memory that stores data temporarily while it is being processed. Registers are the fastest memory locations and are used to store instructions, data, and addresses.
(ii)Clock: A timing device that generates a clock signal to synchronize the CPU’s operations. The clock speed measures the number of cycles per second.
(iii)Bus: A communication pathway that allows different components of the CPU to exchange data. Buses are used to connect registers, ALU, and other CPU components.
(6bi)
(i)Cyberbullying and online harassment, which can lead to mental health issues and social isolation.
(ii)Misinformation and disinformation, which can spread quickly and lead to confusion, mistrust, and harmful decisions.
(6bii)
(i)LAN (Local Area Network)
(ii)WAN (Wide Area Network)
(iii)MAN (Metropolitan Area Network)
(iv)WLAN (Wireless Local Area Network)
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