《操作系统教学资料》操作系统习题英文版.docVIP

Chapter 1 – Computer Systems Overview True / False Questions: T / F – The operating system acts as an interface between the computer hardware and the human user. T / F – One of the processor’s main functions is to exchange data with memory. T / F – User-visible registers are typically accessible to system programs but are not typically available to application programs. T / F – Data registers are general purpose in nature, but may be restricted to specific tasks such as performing floating-point operations. T / F – The Program Status Word contains status information in the form of condition codes, which are bits typically set by the programmer as a result of program operation. T / F – The processing required for a single instruction on a typical computer system is called the Execute Cycle. T / F – A fetched instruction is normally loaded into the Instruction Register (IR). T / F – An interrupt is a mechanism used by system modules to signal the processor that normal processing should be temporarily suspended. T / F – To accommodate interrupts, an extra fetch cycle is added to the instruction cycle. T / F – The minimum information that must be saved before the processor transfers control to the interrupt handler routine is the program status word (PSW) and the location of the current instruction. T / F – One approach to dealing with multiple interrupts is to disable all interrupts while an interrupt is being processed. T / F – Multiprogramming allows the processor to make use of idle time caused by long-wait interrupt handling. T / F – In a two-level memory hierarchy, the Hit Ratio is defined as the fraction of all memory accesses found in the slower memory. T / F – Cache memory exploits the principle of locality by providing a small, fast memory between the processor and main memory. T / F – In cache memory design, block size refers to the unit of data exchanged between cache and main memory T / F – The prima