1 Describe FIVE precautions which can be taken to minimise the chances of a computer being infected by a virus. (5) 2 List the steps to follow when changing the unit measurements from inches to centimetres. (6) 3 Write out the acronym, RAM, in full and list THREE things with examples, which are temporarily stored in here. (7) 4 One of the interns in the company has been complaining about extreme back and wrist pain after working for a long time behind the computer. What advice would you give to this intern regarding ergonomic practices? (5) 5 You start using the computer and realise that the person who had worked on the computer before you was lefthanded and had changed the left and right mouse buttons. 5.1 Describe the steps that you will follow to change the functions of the mouse buttons back for a person who is right-handed. (5) 6 While you are busy working you see that the computer often stops responding. Explain FIVE measures that can be used to prevent a virus from infecting the computer. (5) 6 Define the term ergonomics. (2) 8 Give THREE hints that may help reduce eye strain. (3) 9 Give FIVE common signs that indicate that a computer has been infected by a virus. (5) 10 Write steps to change the number format of the computer by using the regional settings. (6) 11 Define ergonomics. 12 You are working in MS Word and realise that you cannot see the ruler. Explain what steps you would follow to view the ruler. (2) 13 The currency of the computer is in dollars. How would you change these settings of the computer? (5)

Below are sample answers for each question: ────────────────────────────── 1. FIVE precautions to minimise virus infections:  • Keep your operating system and software updated with the latest security patches.  • Install a reputable antivirus/anti‐malware program and schedule regular scans.  • Use a firewall (either built into the OS or a dedicated hardware/software solution).  • Avoid downloading files or opening email attachments from unknown or untrusted sources.  • Do not visit suspicious websites or click on unverified links. ────────────────────────────── 2. Steps to change unit measurements from inches to centimetres:  1. Identify the measurement in inches you need to convert.  2. Recall the conversion factor that 1 inch equals 2.54 centimetres.  3. Multiply the number of inches by 2.54 to convert to centimetres.  4. Use a calculator (if necessary) to ensure accurate computation.  5. Note and record the resulting value in centimetres.  6. Re-check the conversion for correctness. ────────────────────────────── 3. RAM stands for Random Access Memory. Three things stored temporarily in RAM (with examples) are:  • Running applications – e.g. an open web browser or word processor.  • System processes – e.g. operating system components and background services.  • Data caches – e.g. temporary files or buffers used while editing a document. ────────────────────────────── 4. Ergonomic advice for an intern with back and wrist pain:  • Adjust the chair to provide proper lumbar support and ensure feet rest flat on the floor.  • Ensure the computer screen is at or slightly below eye level to avoid neck strain.  • Use an ergonomic keyboard and mouse to keep wrists in a neutral position.  • Take regular breaks (for example, a 5‑minute break every hour) to stand up and stretch.  • Arrange the workstation so that frequently used items are within easy reach, minimizing awkward postures. ────────────────────────────── 5.1. Steps to change the mouse button functions back for a right-handed user (assuming a Windows environment):  1. Click the Start button and open the Control Panel.  2. Select “Mouse” (or “Hardware and Sound” then “Mouse” if using Category view).  3. In the Mouse Properties dialog box, go to the “Buttons” tab.  4. Look for the option labeled “Switch primary and secondary buttons” and uncheck it (or select “Right-handed” mode).  5. Click Apply then OK, and test the mouse to ensure the left button is now the primary click. ────────────────────────────── 6. FIVE measures to prevent a computer from being infected by a virus:  • Install and update antivirus software regularly.  • Keep your operating system and all applications patched against vulnerabilities.  • Use a firewall to monitor and block suspicious network traffic.  • Be cautious with email attachments and downloads from unverified sources.  • Regularly back up important data and avoid visiting unsecure or unfamiliar websites. ────────────────────────────── 7. Define the term ergonomics (2 marks): Ergonomics is the science of designing and arranging workplaces, products, and systems so that they fit the people who use them, thereby maximising efficiency and reducing discomfort or injury. ────────────────────────────── 8. THREE hints to reduce eye strain:  • Follow the 20‑20‑20 rule – every 20 minutes, look at something 20 feet away for 20 seconds.  • Adjust the brightness and contrast of your screen to comfortable levels and reduce glare.  • Ensure adequate ambient lighting and take regular breaks away from the screen. ────────────────────────────── 9. FIVE common signs that a computer may be infected by a virus:  • The computer becomes noticeably slow in performance.  • Frequent pop-up windows or unexpected advertisements appear.  • Programs start or crash unexpectedly without user input.  • Unusual error messages or system alerts are encountered.  • Unexpected changes in system settings or appearance of unfamiliar files or icons. ────────────────────────────── 10. Steps to change the number format using Regional Settings (assuming a Windows environment):  1. Open the Control Panel.  2. Click on “Clock and Region” (or “Region and Language”).  3. Select “Region” (or “Regional Options”).  4. In the Region Settings, go to the “Formats” tab and click on “Additional settings…”.  5. Adjust the number format settings (such as decimal and thousand separators).  6. Click Apply and then OK to save the changes. ────────────────────────────── 11. Define ergonomics: Ergonomics is the discipline that focuses on designing workspaces, tools, and tasks to match the human body’s capabilities and limitations, thereby reducing strain and enhancing productivity. ────────────────────────────── 12. Steps to display the ruler in MS Word:  • Click on the “View” tab on the Ribbon.  • Check the box next to “Ruler” in the Show group to make the ruler visible. ────────────────────────────── 13. How to change the currency settings from dollars to another currency (using Windows Regional Settings):  1. Open the Control Panel.  2. Click on “Clock and Region” (or directly “Region”).  3. Select the “Formats” tab and then click on “Additional settings…”.  4. Navigate to the “Currency” tab or section, and change the Currency Symbol (for example, from $ to your preferred symbol).  5. Click Apply and then OK to save the changes. ────────────────────────────── Each answer is structured to meet the mark allocation as indicated by the parentheses.