奥鹏2014秋大连理工大学《专业英语（计算机英语）》在线测试2答案

大工14秋《专业英语（计算机英语）》在线测试2答案
1. In (C ) mode, the communication is unidirectional, like a one-way street. Only one of the two stations on a link can transmit;the other can only receive.
A. half-duplex
B. full-duplex
C. simplex
D. none of the above
满分：4 分
2. ( A) is an acronym for local area network.It is a group of computers and other devices dispersed over a relatively limited area and connected by a communications link.
A. LAN
B. WAN
C. MAN
D. None of the above
满分：4 分
3. ( A), the protocol for transferring HTML files on the Web.
A. HTML
B. ISP
C. Client
D. Server
满分：4 分
4. (C ), short for modulator/demodulator, device that converts digital signals into a representation of analog form(modulation) to send over phone lines;a receiving modem then converts the analog signal back to a digital signal(demodulation).
A. Server
B. Network
C. Modem
D. Gateway
满分：4 分
5. ( B) is the number of times a wave repeats during a specific time interval,that is how many times it completes a cycle in one second.
A. Amplitude
B. Frequency
C. Analog signals
D. Digital signals
满分：4 分
6. Two types of software are (A ) and application software.
A. system software
B. system call
C. system crash
D. system hardware
满分：4 分
7. In a (B ) network, all microcomputers and other communications devices are connected to a central hub, such as a file server or host computer, usually via (UTP).
A. bus
B. star
C. tree
D. ring
满分：4 分
8. ( A) programs are used to recover deleted or damaged(corrupted) files.
A. Data recovery
B. System call
C. System crash
D. System software
满分：4 分
9. Linux is an operating system similar to (D ) that is becoming more and more popular.
A. Windows 98
B. Windows 2000
C. Windows XP
D. Unix
满分：4 分
10. A (B ) channel allows simultaneous message exchange in both directions.It really consists of two simplex channels, a forward channel and a reverse channel,linking the same points.
A. half-duplex
B. full-duplex
C. simplex
D. none of the above
满分：4 分
11. A (A ) is software that looks at an entire high-level program before translating it into machine language.
A. compiler
B. interpreter
C. instruction
D. process
满分：4 分
12. In a ( D) network, all microcomputers and other communication devices are connected to a continuous loop.
A. bus
B. star
C. tree
D. ring
满分：4 分
13. (A ) is indicated by the height of a wave within a given period of time.
A. Amplitude
B. Frequency
C. Analog signals
D. Digital signals
满分：4 分
14. The (B ) is automatically loaded into RAM soon after you turn on, or “boot” the computer.
A. application software
B. operating software
C. shell
D. compiler
满分：4 分
15. (A ), software used in corporate networks (intranets and extranets) to prevent unauthorized people from accessing the network.
A. Firewall
B. Modem
C. Hypertext
D. TCP
满分：4 分
16. (B ), difference between the lowest and highest frequencies transmitted in a particular channel or system.
A. Amplitude
B. Bandwidth
C. Bridge
D. Network
满分：4 分
17. A (A ) is a highly intelligent device that supports connectivity between both like and unlike LANs,and between LANs and WANs or MANs.
A. router
B. repeater
C. switch
D. bridge
满分：4 分
18. The CPU executes programs coded in a lower level language called the ( C).
A. utility program
B. language translator
C. machine language
D. backup
满分：4 分
19. (D ) is a device that functions as both a router and a bridge.
A. Repeater
B. Switch
C. Gateway
D. Brouter
满分：4 分
20. (A ) also called a program, is the series of computer language coded instructions that tells the computer how to perform tasks.
A. Software
B. Hardware
C. Compiler
D. Interpreter
二、判断题（共 10 道试题，共 20 分。）
V
1. Application software consists of programs that perform specific tasks for users.( B)
A. 错误
B. 正确
满分：2 分
2. Upload, to send files from a user’s microcomputer to another computer. Compare with download.( B)
A. 错误
B. 正确
满分：2 分
3. Operating system is a set of programs that perform specific tasks for users.(B )
A. 错误
B. 正确
满分：2 分
4. C++ is an object-oriented programming language.( B)
A. 错误
B. 正确
满分：2 分
5. Gateway, interface that enables dissimilar networks to communicate with one another.(B )
A. 错误
B. 正确
满分：2 分
6. LAN, communications network that covers a wide geographical area, such as a state or a country.(A )
A. 错误
B. 正确
满分：2 分
7. Bridge, interface that enables WANs to communicate.(A )
A. 错误
B. 正确
满分：2 分
8. Language translators convert the programming instructions into a language that computers understand and process.( B)
A. 错误
B. 正确
满分：2 分
9. User interface controls how you enter data or instructions and how information is displayed on the computer screen.( B)
A. 错误
B. 正确
满分：2 分
10. Device drivers are specialized programs designed to allow particular input or output devices to communicate with the rest of the computer system.(B )
A. 错误
B. 正确