操作系统（第五版）期末选择题题库

第一章

The general role of an operating system is to:

选择一个答案

a.Provide a set of services to system users

b.Manage les for application programs

c.Act as an interface between various computers

d.None of the above

Information that must be saved prior to the processor transferring control to

d.Processor Status Word (PSW) & Location

of next instruction

In a uniprocessor system, multiprogramming increases processor efficiency

by:

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a.Increasing processor speed

b.Eliminating all idle processor cycles

c.All of the above

d.Taking advantage of time wasted by long

wait interrupt handling

d.All of the above

Small, fast memory located between the processor and main memory is

called

选择一个答案

a.Cache memory

b.CD-RW memory

c.WORM memory

d.None of the above

When a new block of data is written into cache memory, the following

determines which cache location the block will occupy:

d.Block size

a. Processor, Registers, Main Memory &

System Bus

b.None of the above

b. d.Processor, Registers, I/O Modules & Main Memory

c. Processor, Main Memory, I/O Modules &

System Bus

The two basic types of processor registers are:

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A Control/Status register that contains the address of the next instruction to

be fetched is called the:

选择一个答案

a.Program Counter (PC)

b.Program Status Word (PSW)

c.Instruction Register (IR)

d.All of the above

The two basic steps used by the processor in instruction processing are:

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a.Instruction Register (IR)

b.Accumulator (AC)

c.None of the above

d.Program Counter (PC)

A common class of interrupts is

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a.I/O

b.Timer

c.All of the above

d.Program

d.Interrupt signal

第二章

A primary objective of an operating system is:

选择一个答案

a.Ability to evolve

b.Convenience