EXAM: Neco 2024

SUBJECT: COMPUTER STUDIES

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COMPUTER STUDIES-OBJ
1-10: CAEBEBEBBA
11-20: ACAACCCCCC
21-30: CEAADAABCA
31-40:CCDCCEBADA
51-50:DBEBCADDDD
51-60: BDBADDDACD
COMPLETED!!!
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COMPUTER STUDIES-ANSWERS
(1)

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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 data is data collected directly from first-hand experience. This data is original and has not been previously published. In the other hand, Secondary data is data that has been previously collected and published by others. This data is not original but rather a summary or analysis of existing information.

(5aii)
(PICK ANY FOUR)
(i) Word Processing Software: Used for creating, editing, formatting, and printing documents. Examples include Microsoft Word and Google Docs.

(ii) Spreadsheet Software: Used for organizing, analyzing, and storing data in tabular form. Examples include Microsoft Excel and Google Sheets.

(iii) Database Management Software: Used for creating and managing databases. Examples include Oracle, MySQL, and Microsoft Access.

(iv) Presentation Software: Used for creating and displaying slideshows and presentations. Examples include Microsoft PowerPoint and Google Slides.

(v) Graphics and Design Software: Used for creating and editing visual content, including images, illustrations, and designs. Examples include Adobe Photoshop and CorelDRAW.

(vi) Web Browsers: Used for accessing and navigating the internet. Examples include Google Chrome, Mozilla Firefox, and Microsoft Edge.

(vii) Email Clients: Used for sending, receiving, and organizing emails. Examples include Microsoft Outlook and Mozilla Thunderbird

(5bi)

| A | B | C | D | Output (NAND) |
|---|---|---|---|---------------|
| 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)
(PICK ANY TWO)
(i) The Arithmetic and Logic Unit (ALU) performs all arithmetic operations such as addition, subtraction, multiplication, and division.
(ii) The ALU also performs logical operations such as AND, OR, NOT, XOR, and comparison operations (like equal to, greater than, and less than).
(iii) The ALU performs bitwise operations, which are operations that directly manipulate individual bits of binary numbers. These operations include bitwise AND, OR, XOR, and NOT.
(iv) The ALU can perform shift operations, which involve moving bits to the left or right within a binary number.

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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)