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👋 Hey everyone! Hope you're all doing well and enjoying your learning journey. Today, we're diving into one of the past papers: Computer Science Paper 1 for Computer Systems, from October/November 2023, Paper 13. This paper lasts 1 hour and 45 minutes. Remember, no extra materials needed, just a PL or dark blue pen for answers and an HB pencil for diagrams. Don't use erasable pens or correction fluid!
✍️ Remember to write your name, center number, and candidate number in the provided boxes. The paper is out of 75 marks, and each question's marks are indicated in brackets.
Alright, so here's a summarized version in the first person:
"Hello everyone, I hope you're all doing well and enjoying your learning. Today, we focused on a past paper, Computer Science Paper 1 - Computer Systems, from October/November 2023. The paper is 1 hour 45 minutes long, and you'll need a PL or dark blue pen. No additional materials are required, just your pen. Remember to write your name, center number, and candidate number in the given boxes.
Question 1: Input devices in a mobile phone include touch screens, microphones, keyboards, keypads, digital cameras, sensors, biometric devices, and buttons. For output devices, examples are screens, speakers, LEDs, actuators, or motors.
Question 2: Binary number system has a base of two (0 and 1), while 8 bits make a byte. For converting decimal numbers to binary, remember to use the working space provided.
Question 3: CPU components include the accumulator, control unit, and arithmetic logic unit (ALU). The operating system's purpose includes managing hardware, providing a platform for software, offering a user interface, and enabling multitasking.
Question 4: Binary numbers are converted to hexadecimal. Remember to use the working space provided. For positive numbers in two's complement, the MSB is 0, and the maximum positive value is 127.
Question 5: Error in data transmission can be due to interference or crosstalk. Echo check does not use a calculated value.
Question 6: Cloud storage characteristics include remote data storage, use of physical servers, and need for internet access. Benefits for owners include remote access, reduced hardware costs, and scalability. Disadvantages for employees include the need for a stable internet connection and potential pressure to work outside hours.
Question 7: Image resolution refers to the dimensions or number of pixels. Color depth is the number of bits used to represent colors. Benefits of increasing color depth include more color range and clearer images.
Question 8: Router's role includes examining packets for destination IP, finding the fastest route, and assigning IP addresses. Secondary storage types are optical (pits and lands), solid-state (control and floating gates), and magnetic (tracks and sectors).
Question 9: Primary storage differences include direct CPU access, current data storage, smaller capacity, volatility, and faster access. Secondary storage differences include no direct CPU access, user files storage, larger capacity, non-volatility, and slower access.
Question 10: Expert system components are the inference engine, interface, and knowledge base. The inference engine applies rules to the knowledge base for diagnosis. Machine learning capabilities include adapting processes, editing algorithms and data, learning with or without human input, analyzing patterns, and storing successful results.
That's a wrap for today's study session. Remember to take your time, understand the questions, and use the provided working spaces. If you have any questions or need clarification, feel free to ask. Keep learning and have a great day!"
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