● A （71） is a functional unit that interprets and carries out instructions.（71）A. memoryB. processorC. storageD. network

A(71)is a functional unit that interprets and carries out instructions．

A．memory

B．processor

C．storage

D．network

● Insufficient （71）can cause a processor to work at 50% or even more below its

performance potential.

（71）

A. mouse

B. I/O

C. document

D. memory

The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the(71)of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to(72). The shell acts as an(73)between the user and the kernel. When a user logs in, the(74)program checks the username and password, and then starts another program called the shell. The shell is a command line(75)(CLI). It interprets the commands the user types in and arranges for them to be carded out. The commands are themselves programs: when they terminate, the shell gives the user another prompt(% on our systems).

A．hub

B．center

C．core

D．nucleus

On a(71) memory system, the logical memory space available to the program is totally independent of the physical memory space.

A．cache

B．EPROM

C．virtual

D．SRAM

A ______ is a functional unit that interprets and carries out instructions.

A．memory

B．processor

C．storage

D．network

A．

B．

C．

D．

The processor manipulates data stored in main memory under the control of a(71)stored in main memory.

A．command

B．program

C．operation

D．code

The line of computing jobs waiting to be run on a computer system might be a(71). The jobs are serviced in the order of their arrival，that is，the first in is the first out.

A．queue

B．stack

C．array

D．record

By means of multiple pipeline to carry out multiple processing, this technology is called(71).

A．Multiple pipeling

B．Superpipeline

C．Superscalar

D．Very long instruction word

We know a computer is a machine that processes data(stored in main memory)into information, under control of a stored program. We also know that, internally, a computer is a binary machine; thus the data and the program instruictions must be stored in binary form. Characters are represented in(71). Numbers are stored as binary numbers, with each bit's positional value significant. A computer's main memory is divided into bytes, words or both(depending on the system), and each of these basic storage units is assigned an(72). Using this address, the processor can read or write selected bytes or words.

The processor consists of a clock, an instruction control unit, an arithmetic and logic unit, and registers. Once a program is stored in main memory, the processor can begin to execute it. During(73), the instruction control unit fetches an instruction from main memory; during(74), the arithmetic and logic unit executes it. Precisely timed electronic pulses generated by the clock drive this basic(75)

A．a binary code

B．words

C．registers

D．positional values

●(71) devices are interface of man and machine.

(71) A． I/O

B．Memory

C．Disk

D．Printer

●Which is not a computer language? (71)

(71) A. office

B. Java

C. C++

D. C#

XP is (71) of interesting twists that encourage one to think--for example, how about "Test and then code"? I've worked with software companies and a few IT organizations in (72) programmer performance was measured on lines of code delivered and testing was measured on defects found-- (73) side was motivated to reduce the number of defects prior to testing. XP uses two types of testing: unit and functional. (74) , the practice for unit testing involves developing the test for the feature prior to writing the code and further states that the tests should be automated. Once the code is written, it is immediately (75) to the test suite bringing instant feedback.

A．filled

B．stuff

C．pack

D．full

The central processing unit(CPU), sometimes referred to as the processor, interprets (解释)and carries out the basic(26)that operate a computer.

A．database

B．files

C．block

D．instructions

The data station usually means a(71)unit that provides data for transmission, that accepts transmitted data, and that performs all functions necessary for communication with another functional unit. Data stations may be divided into two kinds, the primary stations and the secondary stations, (72)control functions.In(73)data link control, the primary station is the data station that supports the primary control functions of the data link, generates commands to be transmitted, and interprets received responses. Specific responsibilities assigned to the primary station include initialization of control signal interchange, organization of data flow and actions regarding error control and error recovery functions. The secondary station executes data link control functions as (74)by the primary station, interprets received commands and (75) responses to be transmitted.

A．performance

B．functional

C．capacity

D．quality

A ______ is a functional unit that interprets and carries out instructions.

A．memory

B．processor

C．storage

D．network

Insufficient(71)can cause a processor to work at 50% or even more below its performance potential.

A．mouse

B．I/O

C．document

D．memory

Functional testing tests whether the output is the expected(71)with the valid input.

A．reason

B．result

C．outcome

D．record

The central processing unit(CPU), sometimes referred to as the processor, interprets(解释)and carries out the basic(71)that operate a computer.

A．database

B．files

C．block

D．instructions

In the data link layer, the data unit is called(71)．

A．flame

B．Packet

C．Signal

D．APDU

● Basically, a computer consists of five components: (71)， memory, storage, input device and output device.

(71)

A.keyboard

B.mouse

C.monitor

D.CPU