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IGCSE COMPUTER SCIENCE 0478 PAPER 2 | OCTOBER/NOVEMBER 2023 | Variant 22 | 0478/22/O/N/23 | SOLVED
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Welcome to our detailed walkthrough of the Cambridge IGCSE Computer Science Paper 2 for the OCTOBER/NOVEMBER 2023 session. This video is designed to help students, teachers, and enthusiasts gain a deeper understanding of the subject matter. Let's dive into the key topics and questions covered in this paper.
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Introduction to the Exam
The IGCSE Computer Science 0478/12 exam for February-March 2024 is a 1 hour 45-minute paper. No additional materials are needed, just a dark blue or black pen. Make sure to write your name, center number, and candidate number at the top. The marks for each question are specified.
Binary and ASCII Representation
In the first question, we discuss why computers use binary. Computers are made of switches and gates that can only be on or off, hence binary is ideal. Humans, however, cannot process binary as quickly as computers. For Part B, the ASCII number for 'n' is 78 and for 'Q' it is 81. The binary representation for 78 is 1001110. Part C explains that higher sampling resolution in sound recording leads to more accurate recordings. In Part D, we explore how 'red' is represented in a character set.
CPU and Performance Enhancements
Question two delves into CPU registers' roles in the fetch-decode-execute cycle. Statements B and C are incorrect because the Memory Data Register (MDR) stores addresses, not instructions. Part B explains the significance of processor speed measured in GHz, while Part C discusses how additional cores can enhance CPU performance. Increasing cache size in Part D also boosts performance. In Part E, we identify RAM as an example of primary storage that stores data for quick access.
Operating Systems and Internet Protocols
Question three focuses on the functions of an operating system (OS). The OS allocates memory to processes, provides a platform for running applications, and manages peripherals like data buffers. Interrupts are used to alert the processor to handle tasks like keyboard inputs. Drawing a diagram for entering a URL involves several stages: sending the URL to a DNS server, the DNS finding the IP address, sending it back to the computer, requesting the web page from the server, and finally, receiving and displaying the page.
Digital Currencies and Automation
In question five, we describe digital currencies using provided terms. Digital currencies utilize blockchains, decentralized databases where each transaction is securely stored and linked to previous ones. This ensures transparency and prevents alterations. Digital currencies exist only electronically and lack a physical form. Question six introduces a self-driving tractor that autonomously handles farming tasks, exemplifying automation and reducing manual labor.
Data Encryption and Number Systems
Question seven highlights the importance of encrypting data before transmission to ensure its confidentiality and safeguard it from unauthorized access. Question eight focuses on the hexadecimal system, which is used to represent binary numbers, making it easier for humans to read and enter. In question nine, we discuss performing logical shifts on binary integers. For example, a right shift by four places divides a positive integer by 16, aiding in data manipulation.
Conclusion
Understanding these concepts enhances our learning journey in technology. Cambridge IGCSE Computer Science helps learners develop an interest in computational thinking and the principles of problem-solving using computers. Students apply this understanding to create computer-based solutions to problems using algorithms and a high-level programming language. They also develop a range of technical skills and the ability to effectively test and evaluate computing solutions.
Studying Cambridge IGCSE Computer Science helps learners appreciate current and emerging computing technologies, recognize the benefits of their use, and understand their potential risks. It provides an ideal foundation for progression to Cambridge International AS & A Level and is valuable for other areas of study and everyday life.
We hope this walkthrough helps you prepare effectively for your exam. Good luck!
#igcse #computer #computerscience #olevel #0478 #teachingbysm
To Enroll in our group classes you may contact us here
+90 535 618 7999
+92 336 182 4462
Introduction to the Exam
The IGCSE Computer Science 0478/12 exam for February-March 2024 is a 1 hour 45-minute paper. No additional materials are needed, just a dark blue or black pen. Make sure to write your name, center number, and candidate number at the top. The marks for each question are specified.
Binary and ASCII Representation
In the first question, we discuss why computers use binary. Computers are made of switches and gates that can only be on or off, hence binary is ideal. Humans, however, cannot process binary as quickly as computers. For Part B, the ASCII number for 'n' is 78 and for 'Q' it is 81. The binary representation for 78 is 1001110. Part C explains that higher sampling resolution in sound recording leads to more accurate recordings. In Part D, we explore how 'red' is represented in a character set.
CPU and Performance Enhancements
Question two delves into CPU registers' roles in the fetch-decode-execute cycle. Statements B and C are incorrect because the Memory Data Register (MDR) stores addresses, not instructions. Part B explains the significance of processor speed measured in GHz, while Part C discusses how additional cores can enhance CPU performance. Increasing cache size in Part D also boosts performance. In Part E, we identify RAM as an example of primary storage that stores data for quick access.
Operating Systems and Internet Protocols
Question three focuses on the functions of an operating system (OS). The OS allocates memory to processes, provides a platform for running applications, and manages peripherals like data buffers. Interrupts are used to alert the processor to handle tasks like keyboard inputs. Drawing a diagram for entering a URL involves several stages: sending the URL to a DNS server, the DNS finding the IP address, sending it back to the computer, requesting the web page from the server, and finally, receiving and displaying the page.
Digital Currencies and Automation
In question five, we describe digital currencies using provided terms. Digital currencies utilize blockchains, decentralized databases where each transaction is securely stored and linked to previous ones. This ensures transparency and prevents alterations. Digital currencies exist only electronically and lack a physical form. Question six introduces a self-driving tractor that autonomously handles farming tasks, exemplifying automation and reducing manual labor.
Data Encryption and Number Systems
Question seven highlights the importance of encrypting data before transmission to ensure its confidentiality and safeguard it from unauthorized access. Question eight focuses on the hexadecimal system, which is used to represent binary numbers, making it easier for humans to read and enter. In question nine, we discuss performing logical shifts on binary integers. For example, a right shift by four places divides a positive integer by 16, aiding in data manipulation.
Conclusion
Understanding these concepts enhances our learning journey in technology. Cambridge IGCSE Computer Science helps learners develop an interest in computational thinking and the principles of problem-solving using computers. Students apply this understanding to create computer-based solutions to problems using algorithms and a high-level programming language. They also develop a range of technical skills and the ability to effectively test and evaluate computing solutions.
Studying Cambridge IGCSE Computer Science helps learners appreciate current and emerging computing technologies, recognize the benefits of their use, and understand their potential risks. It provides an ideal foundation for progression to Cambridge International AS & A Level and is valuable for other areas of study and everyday life.
We hope this walkthrough helps you prepare effectively for your exam. Good luck!
#igcse #computer #computerscience #olevel #0478 #teachingbysm
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