QUIZ 4NAME____________________________SECTION_____________________________1. This is an important consideration when users are charged by online services for time spent online.a. bits per secondb. modem sizec. transmission speedd. Both a and c are correct.LL: 1Page: 7.5Key Question: 7.1Ans: d2. Which of the following is not a function of communications softwarea. temporary modulationb. remote controlc. error correctiond. data compressionLL: 2Page: 7.6Key Question: 7.1Ans: a3. The background signal that causes distortion in a data signal is calleda. amplitude.b. resistance.c. noise.d. opposition.LL: 1Page: 7.6Key Question: 7.1Ans: c4. Which of the following is not one of the most immediate contenders to replace standard phone modems?a. ADSLb. DVD modemsc. satellite dishd. ISDNLL: 2Page: 7.6Key Question: 7.1Ans: b5. Communications channels are also referred to asa. lines.b. media.c. links.d. All of the above are correct.LL: 1Page: 7.8Key Question: 7.2Ans: d6. Which of the following is not a common communications channel type?a. microwave systemb. coaxial cablec. local area networkd. satellite systemLL: 1Page: 7.8Key Question: 7.2Ans: c7. This communications channel is a microwave relay station in orbit around the earth.a. microwave systemb. satellite systemc. GPS systemd. DVD systemLL: 1Page: 7.11Key Question: 7.2Ans: b8. Which of the following can handle e–mail messages, paging, and some headline news items in addition to voice transmission?a. analog cellular phoneb. digital cellular phonec. packet radiod. mobile telephoneLL: 2Page: 7.15Key Question: 7.2Ans: b9. This method of connecting communications line is appropriate for a private line whose sole purpose is to keep data secure by transmitting it from one device to another.a. multipointb. securec. point–to–pointd. serialLL: 2Page: 7.17Key Question: 7.3Ans: c10. With this type of data transmission configuration, often only one communications device can transmit at any given time.a. multipointb. serialc. paralleld. point–to–pointLL: 2Page: 7.17Key Question: 7.3Ans: a11. In which type of data transmission configuration are bits transmitted sequentially, one after the other?a. point–to–pointb. serialc. multipointd. parallelLL: 1Page: 7.17Key Question: 7.3Ans: bGive definition:12. database (KQ 12.2, p. 12.6) Collection of related files in a computer system.13. database management system (DBMS) (KQ 12.5, p. 12.12) Also called database manager; softwarethat controls the structure of a database and access to the data. In contrast to a file manager, it allows users to manipulate more than one file at a time.14. data file (KQ 12.3, p. 12.8) File that contains data.15. file (KQ 12.2, p. 12.6) Collection of related records.16. file management system (KQ 12.4, p. 12.11) Also called file manager; software for creating, retrieving, and manipulating files, one file at a time.17. key field (KQ 12.2, p. 12.7) Field that contains unique data used to identify a record so that it can be easily retrieved and processed. The key field is often an identification number, Social Security number, customer account number, or the like. The primary characteristic of the key field is that it is unique.18. program file (KQ 12.3, p. 12.8) File containing software instructions.19. record (KQ 12.2, p. 12.6) Collection of related fields. An example of a record would be your name and date of birth and Social Security number.20. shared database (KQ 12.1, p. 12.4) Database in one location that is shared by users within one company or