● The most important program on any computer is （73） .（73）A. Office 2000B. VirusC. softwareD. Operating System

● The (72) is a collection of modules serving as interface between hardware and software to provide a software platform.

(72)

A. computer

B. processor

C. application software

D. operating system

● Integration（73）is the process of verifying that the components of a system work together as described in the program design and system design specifications.

（73）A. trying B. checking C. testing D. coding

● （73） is the first line of protect between your computer and the public Internet.

（73）

A. The Internet protocol

B. The firewall

C. The anti-virus software

D. The intrusion-detection systems

The purpose of(66)is to enlarge the(67), the set of addresses a program can utilize. For example, it might contain twice as many addresses as main memory. A program using all of it, therefore, would not be able to fit in main memory all at once. Nevertheless, the computer could execute such a program by Copying into main memory those portions of the program needed at any given point during execution.

To facilitate copying(66)into real memory, the operating system divides it into pages, each of which contains a fixed number of addresses. Each page is stored on a disk until ii is needed. When the page is needed, the operating system copies it from disk to main memory, translating the(68)into real addresses. The process of translating virtual addresses into real addresses is called(69). The copying of virtual pages from disk to main memory is known as(70)or swapping.

A．fake memory

B．false memory

C．virtual memory

D．mendacious memory

Password is a(n)(71)series of characters that enables a user(72)a file, computer or program. On multi - user systems,(73)user must enter his or her password(74)the computer will respond to commands. The password helps ensure that unauthorized users do not access the computer. In addition, data files and programs may require a password.

Ideally, the password should be something(75)could guess. In practice, most people choose a password that is easy to remember, such as their name or their initials. This is one reason it is relatively easy to break into most computer system.

A．obvious

B．secret

C．important

D．easy

A. Operating system type of the connected PCs

B. Location of the wireless router

C. Number of PCs that will access the network

D. Number of available Ethernet ports on the router

Integration(73)is the process of verifying that the components of a system work togedler as described in the program design and system design speci6cations．

A．trying

B．checklng

C．testing

D．coding

The main feature of(72)is that they follow a first-come/first-served rule. For instance, the line of(73)waiting to be run on a computer system.

A．looplinks

B．queues

C．stacks

D．trees

●The operating system provides an easy-to-use (73) to users.

(73)A. interface

B. hardware

C. device

D. disk

● (73) manages the other components of a computer system.

(73)A．Bus

B．Application system

C．Operating system

D．Disk

Integration(73)is the process of verifying that the components of asystem work together as described in the program design and system design specifications．

A．trying

B．checking

C．testing

D．coding

● The program and the data are kept inside the computer in a place called

(73) .

(73)

A. bus

B. cache

C. CPU

D. memory

● To document your code can increase program （72） and make program easier to （73）.

（72）

A. reliability

B. security

C. readability

D. usability

（73）

A. execute

B. interpret

C. compile

D. maintain

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

Software refers to(70). The most important software on any computer is(71).

A．input

B．programs

C．output

D．electronic

The most important program on any computer is (73) .

A．Office 2000

B．Virus

C．software

D．Operating System

Inside the computer, the operation system(of another software module called a data communication(71))must decide which program will get control next. Each program remember, is associated(72). a particular front -end port. If a program's data have not yet reached its front - end buffer, there is no point giving that program control. Thus the data communication monitor sends its own(73)signal to the front -end devices next port is polled. Note that the(74)computer speed. The computer never has to wait for a terminal or a communication line. Instead, it is the expressive front - end processor that waits for the slower system(75)to respond.

A．memory

B．control

C．monitor

D．charge

●The most important core component of computer system is (71) ．

(71)

A．CD-ROM

B．DRAM

C．CPU

D．CRT

● One of the basic rules of computer security is to change your（73） regularly.

（73）

A. name

B. computer

C. password

D. device

● (73)testing is the responsibility ofthe programmer, who knows exactly what is going on inside the program.

(73)

A. Acceptance

B.System

C.Black box

D.White box