Expand the following acronyms giving explanations in each case: A. ASCII B. EBCDIC C. BCD D. FIFO (ii) Explain two uses of ICT tools in Education and Military sectors.

QUESTION 1 (i) Expand the following acronyms giving explanations in each case: A. ASCII American Standard Code for Information Interchange. It is a character encoding standard for electronic communication, representing text in computers, telecommunications equipment, and other devices. B. EBCDIC Extended Binary Coded Decimal Interchange Code. It is an 8-bit character encoding used mainly on IBM mainframe and IBM midrange computer operating systems. C. BCD Binary Coded Decimal. It is a system of writing numerals that assigns a four-bit binary code to each decimal digit. D. FIFO First-In, First-Out. It is a method for processing data or managing queues where the first element added is the first one to be processed. (ii) Explain two uses of ICT tools in the following sectors: A. Education Online learning platforms: Tools like Moodle or Google Classroom facilitate remote education, allowing students to access course materials, submit assignments, and interact with instructors from anywhere. Interactive whiteboards: These enhance classroom engagement by allowing teachers to display multimedia content, annotate directly on screen, and save lessons for future reference. B. Military Command and control systems: ICT tools are used for real-time communication, data analysis, and coordination of military operations, improving decision-making and response times. Simulation and training: Virtual reality and simulation software train soldiers for various scenarios, reducing risks and costs associated with real-world exercises. C. Multinational corporation Global communication and collaboration: Tools like video conferencing (e.g., Zoom, Microsoft Teams) and shared document platforms enable employees across different geographical locations to communicate and work together efficiently. Enterprise Resource Planning (ERP) systems: These integrate various business processes such as finance, human resources, and supply chain management, providing a unified view of operations and improving efficiency. (iii) Giving examples in each case, describe the following ICT terms: A. Modeling Modeling involves creating a simplified representation of a real-world system or process to understand its behavior. For example, an architect uses 3D modeling software like AutoCAD to design and visualize a building before construction begins. B. Computer simulation Computer simulation is the process of running a model to observe its behavior over time, often to predict outcomes or test hypotheses. For example, weather forecasting uses complex computer simulations to predict future weather patterns based on current atmospheric data. C. Prototyping Prototyping is the process of creating an early, often incomplete, version of a product or system to test concepts, gather feedback, and refine the design. For example, a software developer might create a basic user interface (UI) prototype to get feedback from potential users before writing the full code for an application. (iv) Discuss with examples two changes in the workplace due to increased use of ICT tools by employees. Increased remote work and flexibility: ICT tools like video conferencing, cloud computing, and virtual private networks (VPNs) have enabled employees to work from home or other remote locations. For example, a marketing team can collaborate on a campaign using shared documents and video calls, eliminating the need for daily in-person meetings. Enhanced productivity and automation: ICT tools automate repetitive tasks and streamline workflows, allowing employees to focus on more complex and creative work. For instance, data entry can be automated using software, freeing up employees to analyze the data and make strategic decisions. --- QUESTION 2 (i) A. Explain the meaning of the term "data security". Data security refers to the protective measures applied to prevent unauthorized access, corruption, or theft of data throughout its entire lifecycle. It ensures the confidentiality, integrity, and availability of information. B. List and explain TWO main threats to the safety of data and TWO methods to combat these. Threat 1: Malware (e.g., viruses, ransomware). Malware is malicious software designed to disrupt computer operations, steal data, or gain unauthorized access. Combat Method 1: Antivirus software. Regularly updated antivirus software can detect, prevent, and remove malware from systems. Threat 2: Phishing. Phishing is a type of social engineering attack where attackers attempt to trick individuals into revealing sensitive information (e.g., passwords, credit card numbers) by impersonating a trustworthy entity. Combat Method 2: Employee training and awareness. Educating employees about how to identify phishing attempts and best practices for handling suspicious emails can significantly reduce the risk. C. What is the Data Protection Act? The Data Protection Act is a law designed to protect personal data stored on computers or in organized paper filing systems. It sets out principles for how personal information should be collected, processed, stored, and shared, ensuring individuals' privacy rights. (ii) Artificial intelligence is an important technological innovation that has shown the true potential of the ability of computers for learning and it is being used in a wide range of applications. A. What is Artificial Intelligence? Artificial Intelligence (AI) refers to the simulation of human intelligence in machines that are programmed to think and learn like humans. It involves developing computer systems capable of performing tasks that typically require human intelligence, such as problem-solving, learning, decision-making, and understanding language. B. Describe TWO areas where artificial intelligence is being applied? Healthcare: AI is used for diagnosing diseases (e.g., analyzing medical images for early detection of cancer), drug discovery, and personalized treatment plans. Autonomous vehicles: AI powers self-driving cars, enabling them to perceive their environment, navigate, and make driving decisions without human intervention. C. Explain ONE way in which you can use artificial intelligence in your studies out of school. I can use AI-powered language translation tools (e.g., Google Translate) to understand academic articles or research papers written in foreign languages, expanding my access to information beyond my native language. (iii) A. What is a file extension? A file extension is a suffix at the end of a computer file's name, typically separated by a dot (e.g., .txt, .jpg). It indicates the file type and tells the operating system which software application should be used to open or process the file. B. Copy and complete the table below by giving one example of file extension for each file type: | File Type | Example File Extension | | :----------- | :--------------------- | | Audio | .mp3 | | Video | .mp4 | | Spreadsheet | .xlsx | | Picture | .jpg | | Document | .docx | | Hypermedia | .html | (iv) Define robotics and state one application of a robot in an industry. Robotics is the branch of engineering and computer science that deals with the design, construction, operation, and application of robots. Robots are programmable machines capable of carrying out a complex series of actions automatically. Application: In the manufacturing industry, robots are used for assembly line tasks, such as welding car parts or assembling electronic components, improving efficiency and precision. (v) State one characteristic each, of 2nd and 5th generation computers. 2nd Generation Computers: Used transistors instead of vacuum tubes, making them smaller, faster, more reliable, and more energy-efficient. 5th Generation Computers: Characterized by Artificial Intelligence (AI) and parallel processing, aiming to develop computers that can understand natural language and make decisions. --- QUESTION 3 (i) A. Convert from base 2 to decimal the number 111101.01. Step 1: Identify the place values for each digit in the binary number. 111101.01_2 = (1 × 2^5) + (1 × 2^4) + (1 × 2^3) + (1 × 2^2) + (0 × 2^1) + (1 × 2^0) + (0 × 2^-1) + (1 × 2^-2) Step 2: Calculate the value for each term. = (1 × 32) + (1 × 16) + (1 × 8) + (1 × 4) + (0 × 2) + (1 × 1) + (0 × 0.5) + (1 × 0.25) = 32 + 16 + 8 + 4 + 0 + 1 + 0 + 0.25 Step 3: Sum the values. = 61.25 The decimal equivalent is 61.25. B. Evaluate: 1. 11000_2 - 11_2 Step 1: Convert to decimal (optional, but can help visualize). 11000_2 = 16 + 8 = 24_10 11_2 = 2 + 1 = 3_10 24 - 3 = 21_10 Step 2: Perform binary subtraction. ` 11000 11 ------- ` Starting from the rightmost bit: 0 - 1 (borrow from left) → 10_2 - 1_2 = 1_2. The next bit becomes 1 (from 0 after borrowing). 1 - 1 = 0. 0 - 0 = 0. 1 - 0 = 1. 1 - 0 = 1. ` 11000 0011 ------- 10101 ` The result is 10101_2. 2. 111_2 × 101_2 Step 1: Perform binary multiplication similar to decimal multiplication. ` 111 x 101 ----- 111 (111 x 1) 0000 (111 x 0, shifted left by 1) + 11100 (111 x 1, shifted left by 2) ----- ` Step 2: Add the partial products. ` 00111 00000 + 11100 --------- 100011 ` The result is 100011_2. (ii) Explain the main functions of each of the following hardware: A. Sound card A sound card is an internal computer hardware component that facilitates the input and output of audio signals to and from a computer. Its main function is to convert digital audio data into analog sound waves that can be heard through speakers or headphones, and to convert analog sound from a microphone into digital data for the computer. B. Smartboard A smartboard (or interactive whiteboard) is a large interactive display board that connects to a computer and a projector. Its main function is to allow users to interact with computer applications by touching the screen directly, enabling presentations, collaborative work, and interactive learning experiences. C. NIC A NIC (Network Interface Card) is a hardware component that connects a computer to a computer network. Its main function is to enable communication between the computer and other network devices, translating data into a format that can be transmitted over the network and vice versa. D. Expansion card An expansion card is a printed circuit board that can be inserted into an expansion slot on a computer's motherboard to add functionality or resources that are not built into the motherboard. Its main function is to enhance a computer's capabilities, such as adding more USB ports, improving graphics performance (e.g., a graphics card), or providing specialized network connectivity. (iii) A. Draw the truth table and the logic circuit for the following Boolean expression: X.(X+Y) Step 1: Simplify the Boolean expression using Boolean algebra. X · (X+Y) = (X · X) + (X · Y) Since X · X = X: X · (X+Y) = X + (X · Y) Using the absorption law (A + A · B = A): X + (X · Y) = X So, the expression simplifies to X. Step 2: Draw the truth table for X · (X+Y). Since the expression simplifies to X, the output will always be the same as the input X. | X | Y | X+Y | X · (X+Y) | | :-- | :-- | :---- | :-------------- | | 0 | 0 | 0 | 0 | | 0 | 1 | 1 | 0 | | 1 | 0 | 1 | 1 | | 1 | 1 | 1 | 1 | Step 3: Draw the logic circuit for X · (X+Y). The circuit consists of an OR gate for (X+Y) and an AND gate for X · (X+Y). ` X ---+--- OR ---+--- AND --- Output | | | Y ---+ | | X --------------+ ` However, since the expression simplifies to X, the simplest logic circuit is just a direct connection from input X to the output.