OSG202 – HaiAnh Exam Practice Questions and Answers

OSG202 – HaiAnh Exam Practice Questions and Answers Which of the following statements about the CPU's handling interrupts is incorrect? * None of the other choices The CPU branches to a new instruction sequence The hardware saves the old PC location The processor ceases to execute the current sequence of instructions - ANSWER-None of the other choices ____ is the partitioning of a single server, each of which can support a different operating * Multiprocessing Multithreading Shared processing Virtualization - ANSWER-D ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/181 Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 1 nsec to access a word from the cache, 10 nsec to access a word from RAM, and 10 msec to access a word from the disk. If the cache hit rate is 95% and main memory hit rate is 99%, what is average time to access a word? * a. 1.445 nsec b. 5,001.445 nsec c. 5,000.495 nsec d. 5,000.95 nsec - ANSWER-B Booting a general purpose computer involves the following steps except * a. Loading the OS b. Loading the command interpreter c. Loading one or more bootstrap loaders d. Execution of a ROM-based POST sequence - ANSWER-B As one proceeds down the memory hierarchy (from inboard memory to offline storage), which of the following conditions is correct? * Decreasing access time ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/181 None of the other choices Decreasing cost per bit Decreasing capacity - ANSWER-C The two basic types of processor registers are: * User-visible and user-invisible registers None of the other choices Control and Status registers General and special registers - ANSWER-D Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 2 nsec to access a byte from the cache, 20 nsec to access a byte from RAM, and 10 msec to access a block of 1000 bytes from the disk. If a book has 1000 pages, each with 50 lines of 80 characters each, How long it will take to electronically scan the text for the case of the master copy being in each of the level as one proceeds down the memory hierarchy (from inboard memory to offline storage)? * 1 msec, 10 msec, 5 sec 1 msec, 10 msec, 10 sec ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/181 2 msec, 20 msec, 10 sec 4 msec, 40 msec, 20 sec - ANSWER-D The main characteristics of layered system does not include: * A. Upper layer can only call functions of closely lower layer B. Each layer has well defined functions C. Each layer runs independently D. Many layers - ANSWER-C Which of special register in the CPU points to the top of the current stack in the memory? * PC PSW IR SP - ANSWER-D A CPU may have multiple execution units, so that can carry out multiple instructions in the same time is called: * 0/1 ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 5/181 None of the other choices Multicore Pipeline Superscalar - ANSWER-D Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 2 nsec to access a word from the cache, 20 nsec to access a word from RAM, and 10 msec to access a word from the disk. If the cache hit rate is 95% and main memory hit rate is 99%, what is average time to access a word? * 5,000.99 nsec 5,002.89 nsec 2.89 nsec 5,001.9 nsec - ANSWER-B Information that must be saved prior to the processor transferring control to the interrupt handler routine includes: * 0/1 PSW ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 6/181 None of the other choices PSW and Contents of processor registers PSW and PC - ANSWER-D Examples of general purpose stored program computers include the following except * 0/1 Personal computers Network servers Workstations MP3 player - ANSWER-D The ways that input/output can be done is? * DMA (Direct Memory Access) All of the other choices Busy waiting ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 7/181 Interrupt - ANSWER-B List of memory location, that contains the executable program, the program's data, and its stack is called: * 0/1 set of resources all of the other choice