CS1170 Introduction to Computer Systems

CS1170 Introduction to Computer Systems Section A — Answer all questions There are TWENTY multiple-choice questions in this section. Each Question carries 2 marks. There is only one correct answer to each question. Signify your answer by encircling its index letter. 1. Multiple programs share (0) a) memory (0) b) I/O devices (0) c) CPU time (0) d) a and c (2) e) a, b and c 2. In the UNIX kernel, demand paging is executed by which group of operations? (2) a) virtual storage and memory management (0) b) process management (0) c) file management (0) d) I/O (0) e) networking and communication 3. The working memory of the computer system is: (0) a) the hard disk (2) b) the RAM (0) c) the floppy disk (0) d) the CD-ROM (0) e) the CPU 4. Which of the following best describes networking protocols? (0) a) The use of the same manufacturer’s hardware throughout a network (0) b) A set of utilities that can be used by a network manager (0) c) The layers of the TCP/IP model (2) d) A set of rules that describe how devices should exchange information (0) e) Both a and c above 1 OF 9 Downloaded by Austine Wanjala () lOMoARcPSD| ANSWERS CS1170 Introduction to Computer Systems 5. Computer memory is organised into a hierarchy which consists of multiple levels of memory with different speeds and sizes. Order the following storage mediums from fastest to slowest data access speed: registers, cache, hard disk and main memory. (0) a) cache, hard disk, main memory, registers. (0) b) cache, registers, main memory, hard disk. (0) c) registers, cache, hard disk, main memory. (0) d) registers, main memory, cache, hard disk. (2) e) registers, cache, main memory, hard disk. 6. Data on a CD-ROM is stored in the form of and . (0) a) bumps; holes (2) b) pits; lands (0) c) pits; bumps (0) d) + charge; -charge (0) e) pit; flat line 7. Addresses and data share the same lines on the bus, using a technique called: (0) a) forward line sharing (0) b) Address/Data line interleaving (0) c) dualplexing (2) d) multiplexing (0) e) singleplexing 8. The Number System in which 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F are valid digits is: (0) a) Subdecimal (0) b) Decimal (2) c) Hexadecimal (0) d) Octal (0) e) Binary 2 OF 9 Downloaded by Austine Wanjala () lOMoARcPSD| ANSWERS CS1170 Introduction to Computer Systems 9. CACHE memory holds: (2) a) frequently used data and instructions (0) b) direct tunnelling address modes (0) c) data only (0) d) instructions only (0) e) addresses only 10. The ALU is the component of the CPU where and . (0) a) data is stored; instructions are interpreted (0) b) calculations take place; instructions are interpreted (2) c) data is held temporarily; calculations are made (0) d) programs are decoded; instructions are fetched (0) e) programs are decoded; instructions are executed 11. Which of the following devices is NOT an OUTPUT device: (2) a) The CPU (0) b) The monitor (0) c) The printer (0) d) The speaker (0) e) The hard drive 12. If the Memory Address Register sends a 16-bit address to the Address Decoder to locate a word in a memory, there can be a total of memory words? (0) a) 16 (0) b) 128 (0) c) 256 (0) d) 2 16 − 1 (2) e) 2 16 3 OF 9 Downloaded by Austine Wanjala ()