OSG202 - HaiAnh

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 - ansNone of the other choices ____ is the partitioning of a single server, each of which can support a different operating * Multiprocessing Multithreading Shared processing Virtualization - ansD 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 - ansB 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 - ansB As one proceeds down the memory hierarchy (from inboard memory to offline storage), which of the following conditions is correct? * Decreasing access time None of the other choices Decreasing cost per bit Decreasing capacity - ansC 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 - ansD 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)? *