Let's knock this out. 1. (a) (i) An information system is a set of interrelated components working together to collect, process, store, and disseminate information to support decision-making, coordination, control, analysis, and visualization in an organization. It combines hardware, software, data, people, and processes to achieve specific goals. 1. (a) (ii) The five basic components of an information system are: Hardware*: The physical equipment used for input, processing, and output activities. Examples include computers, keyboards, and printers. Software*: The programs and instructions that tell the hardware what to do. This includes system software (like operating systems) and application software (like word processors). Data*: Raw facts and figures that are processed to produce information. For a school, this could be student names, grades, or attendance records. People*: The users, operators, and developers of the information system. This includes students, teachers, and IT staff. Processes*: The steps and procedures that govern how data is collected, processed, and used within the system. This includes rules for data entry and report generation. 1. (b) (i) Two components of a Transaction Processing System (TPS) used in a school system for fees and attendance are: Data Entry*: This component allows for the input of raw transaction data, such as student fee payments or daily attendance marks. For example, a clerk enters the amount paid by a student and the date, or a teacher marks a student present/absent. Transaction Processing*: This involves performing operations on the entered data, such as updating student fee balances or attendance records. For instance, when a fee payment is entered, the system debits the student's account, or when attendance is marked, the student's attendance percentage is updated. 1. (b) (ii) Two limitations of this TPS compared to a Management Information System (MIS) are: Limited Analytical Capabilities*: A TPS primarily focuses on capturing and processing daily transactions. It provides basic reports but lacks the advanced analytical tools and models found in an MIS, which are designed to help managers analyze trends, forecast, and make strategic decisions. Lack of Strategic Reporting*: TPS reports are typically detailed and transaction-oriented, such as a list of daily fee payments or attendance logs. An MIS, however, aggregates data from TPS and other sources to generate summary reports, exception reports, and comparative analyses that are crucial for middle and senior management to monitor performance and make long-term plans. 1. (c) Two advantages of using an Expert System for diagnosing common diseases in rural health centres in Cameroon*: Improved Accessibility to Expertise*: Expert systems can make specialized medical knowledge available in remote rural areas where human medical experts might be scarce, allowing local health workers to get diagnostic support. Consistency and Accuracy*: They provide consistent diagnoses based on programmed rules and data, reducing human error and ensuring a standardized approach to diagnosis, potentially leading to more accurate and timely treatment. One ethical concern*: Over-reliance and Deskilling*: There is a risk that health workers might become overly reliant on the expert system, potentially leading to a decline in their own diagnostic skills and critical thinking. This could be problematic if the system fails or provides incorrect advice. 2. (a) (i) Job scheduling in an operating system refers to the process of deciding which job (or process) from the job queue should be executed next by the CPU. Its main goal is to optimize system performance, such as maximizing CPU utilization, minimizing response time, and ensuring fairness among processes. 2. (a) (ii) Pre-emptive scheduling: In this type of scheduling, the CPU can be taken away from a running process and allocated to another process, even if the first process has not completed its execution. This typically happens when a higher-priority process arrives or a time slice expires. An example strategy is Round Robin scheduling*, where each process is given a fixed time slice, and if it doesn't complete within that time, it's pre-empted and moved to the end of the queue. Non-pre-emptive scheduling: In this type, once a process starts executing, it continues to run until it completes its execution or voluntarily yields the CPU (e.g., by waiting for an I/O operation). The CPU cannot be forcibly taken away. An example strategy is First-Come, First-Served (FCFS)*, where processes are executed in the order they arrive in the ready queue without interruption. 2. (b) (i) Two other functions of an operating system besides scheduling are: Memory Management*: The operating system manages the computer's main memory (RAM). It allocates memory space to processes when they need it, deallocates it when they are done, and keeps track of which parts of memory are in use and by whom. This prevents processes from interfering with each other's memory space. File Management*: The operating system is responsible for organizing, storing, retrieving, naming, sharing, and protecting files and directories on storage devices. It provides a logical view of files, allowing users to access them without needing to know their physical location on the disk. 2. (b) (ii) Multitasking: This is the ability of an operating system to execute multiple tasks (processes or programs) concurrently over a period of time by rapidly switching between them. In a modern school computer lab, a student might be multitasking* by simultaneously running a web browser to research, a word processor to write an essay, and a spreadsheet program to analyze data, all on a single computer with one CPU. The OS switches between these applications so quickly that it appears they are all running at the same time. Multiprocessing*: This refers to the use of two or more central processing units (CPUs) or CPU cores within a single computer system. Each CPU or core can execute instructions independently. In a modern school computer lab, if the computers have multi-core processors (e.g., dual-core or quad-core), the operating system can assign different parts of a single complex task or entirely different tasks to be processed simultaneously by different cores. For example, one core might handle the operating system's background tasks while another core is dedicated to running a demanding educational simulation, leading to faster overall performance. 2. (c) Graphical User Interface (GUI)*: Properties: It is visual and intuitive, using icons, menus, and windows to represent information and actions. It is mouse-driven*, allowing users to interact with elements by clicking, dragging, and dropping. Example*: Microsoft Windows operating system. Command Line Interface (CLI)*: Properties: It is text-based, requiring users to type commands to interact with the system. It is precise and powerful*, allowing for complex operations with specific syntax. Example*: Linux Terminal (e.g., Bash shell). Send me the next one 📸