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

$$
11101110_2 + 1_2 = 11101111_2
$$
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.