8. A ( ) is a plastic card that allows the holder to obtain goods and services on credit terms without the immediate requirement to pay cash. A. Electronic Commerce B. Credit card C. Online payment D. none of the above ...

3. ( ), technological and managerial procedures applied to computer systems to ensure the availability, integrity and confidentiality of information managed by the computer system. A. Computer Security B. Decrypt C. Encryption D. Firew...

8. The CPU executes programs coded in a lower level language called the machine language. A. 错误 B. 正确 ...

3. A router is a highly intelligent device that supports connectivity between both like and unlike LANs,and between LANs and WANs or MANs. A. 错误 B. 正确 ...

8. ( ), communications network that covers a wide geographical area, such as a state or a country. A. LAN B. MAN C. WAN D. none of the above ...

3. ( ) convert the programming instructions into a language that computers understand and process. A. Language translators B. Utilities programs C. System software D. Operating system ...

8. ALU performs arithmetic, comparison, and logic operations. It is one part of the CPU. A. 错误 B. 正确 ...

3. RAM stands for Read Only Memory, it is the computer memory on which data has been prerecorded.Once data has been written on a RAM chip, it cannot be removed and can only be read. A. 错误 B. 正确 ...

8. The first computers used ( ) for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms. A. vacumm tubes B. transistors C. integrated circuits D. microprocessors ...

3. ( ) also called main memory, primary storage, RAM, is an internal storage area in the computer, where data and programs designed for immediate processing are held. A. Software B. Hardware C. Memory D. Mainframe ...