What are the answers to these Operating Systems and Computer Architecture multiple choice questions?

Hey IT, good to see you again. Here are the answers to the multiple-choice questions: 21. It analyses each resource request and grants it only if deadlock is not possible. This approach aims to: This describes a deadlock avoidance strategy, where the system dynamically checks if granting a resource request could lead to an unsafe state (potential deadlock) before allowing it. The correct answer is B. 22. It best captures the overall responsibility of an operating system. An operating system's core function is to manage all the computer's resources, including hardware and software, to ensure efficient and fair use. The correct answer is A. 23. The number -17 translated into an 8-bits two's complement binary integer is: Step 1: Find the binary representation of positive 17_10. 17_10 = 00010001_2 (in 8 bits) Step 2: Find the one's complement by inverting all bits. 00010001_2 → 11101110_2 Step 3: Find the two's complement by adding 1 to the one's complement. 11101110_2 + 1_2 = 11101111_2 The correct answer is A. 24. The positive binary number 1010111 translate into hexadecimal is: The given binary number is 1010111_2. To convert to hexadecimal, we group bits in fours from the right. 0101 \ 0111_2 Convert each group to hexadecimal: 0101_2 = 5_16 0111_2 = 7_16 Combining these gives 57_16. Self-correction: Since 57_16 is not among the options, it is highly probable that the binary number was intended to be 8 bits, 10101111_2. If we assume this, then: 1010 \ 1111_2 1010_2 = A_16 1111_2 = F_16 Combining these gives AF_16. Assuming the intended 8-bit number was 10101111_2, the correct answer is B. 25. Two components of the Von Neumann Architecture are: The Von Neumann architecture fundamentally consists of a central processing unit (CPU) and a single, unified memory unit that stores both instructions and data. The CPU is often referred to as the processor. The correct answer is D. 26. Kiyana is looking to analyze large datasets to find patterns and make predictions. It is best she uses: Machine learning is a field of artificial intelligence that focuses on developing algorithms that allow computers to learn from data and make predictions or decisions without being explicitly programmed. The correct answer is C. 27. A table in third normal form is one which: A table is in Third Normal Form (3NF) if it is in Second Normal Form (2NF) and all non-key attributes are not transitively dependent on the primary key. This means it contains no non-key dependencies. The correct answer is D. 28. Which layer in the OSI model is responsible for error detection and correction?: The Data Link Layer (Layer 2) is responsible for reliable data transfer across a physical link, including framing, physical addressing, and error detection and correction. The correct answer is B. What's next?