Test yourself

Match the following key terms to the appropriate definition:

A.

1. Special-purpose computer
2. General-purpose computer
3. Computer literacy
4. Documentation
5. Tutorial
6. Spreadsheet
7. Programming language
8. System
9. Code
10. Circuit
11. Integrated circuit

a. The books and manuals that accompany a computer-related product.

b. A computer whose operation can be changed by altering its programs.

c. An interconnected set of electronic components that performs a function.

d. A formally constructed artificial language in which the syntax and grammar are stated so precisely that a computer can analyze, interpret, and understand the meaning of that language.

e. A computer that is dedicated to a single purpose.

f. The knowledge and skills required to use a computer as a problem-solving tool.

g. A ready-made program that enables you to organize num­bers and formulas into a rectangular array of cells.

h. A computer program that contains step-by-step directions for learning how to use a computer or a computer program.

i. A set or arrangement of parts acting together to perform a function.

j. Combinations of thousands of circuits built on tiny pieces of silicon, which are called chips.

k. A set of symbols that represents another set of symbols.

B.

12. Bit

13. Information system

14. Communication system

15. Network

16. Hardware

17. Software

18. Applications

19. Keyboard

20. Mouse

21. Microprocessor

a) A pointing device that combines the traditional cursor movements with the means to select an object on the display.

b) The smallest unit of information used in computer and communication systems.

c) The things computers can do.

d) Two or more communicating devices that are con­nected to each other.

e) A device that converts keystrokes into special codes that can be electronically manipulated by the computer.

f) The physical components of a computer or other system.

g) The central processing unit of a microcomputer.

h) A system that consists of a sender, a physical channel, and a receiver.

i) A system that takes input, processes it, and produces infor­mation as output.

j) Programs that control the operation of a computer system.

C.

22. Display

23. Memory

24. ROM (read-only memory)

25. RAM (random-access memory)

26. Byte

27. System board

28. Expansion slot

29. Disk

30. Printer

31. Port

a. A form of storage where programs, data to be input, and results to be output are stored.

b. The location through which the computer exchanges information with an external device.

c. A device that produces output from a computer system by transferring an image onto paper.

d. Eight consecutive bits that are the equivalent of one character.

e. A device that is used to give you feedback and to view the computer's output.

f. A circular platter on which a recording surface has been applied.

g. A socket into which additional circuit boards can be plugged.

h. Temporary memory that is empty until the microproces­sor needs to use it, that is, until it loads programs and data into it.

i. A fibreglass circuit board that contains sockets into which chips are plugged and tracks that connect the various chips.

j. Permanent memory from which the microprocessor can read information, but whose contents can be neither erased nor written over.

True/False:

32. The fastest computers made are called supercomputers.

33. The broadest categories of computers are personal computers and mainframes.

34. Special-purpose computers can be adapted to many situations by giving them an appropriate program.

35. Learning how to program is a requirement for using a computer as a problem-solving tool.

36. A programming language is a formally con­structed artificial language.

37. Writing a program is an intellectually simple task.

38. One of the problems with computers is that informa­tion cannot be represented as electrical signals.

39. A binary signal combines the three possibilities of yes, no, and maybe.

40. A telephone system is an example of a network that processes centralized output.

41. The two types of disks are magnetic and optical.

Multiple Choice:

42. The broadest categories of com­puters are called

a. Special and general purpose.

b. Mainframes, minicomputers, and personal computers.

c. Supercomputers and minicom­puters.

d. None of the above.

43. Large-scale general-purpose computers are called

e. Supercomputers.

f. Mainframes.

g. Minicomputers.

h. Personal computers.

1. Ready-made programs such as spreadsheets
1. Help you to learn programming.
2. Help your reading about computers.
3. Are tutorials that help you to learn about computers.
4. Help you to concentrate on solving problems.
5. Translate a highly specialized and complex computer termi­nology into an easy-to-learn language.

45. A bit is the smallest possible unit of information because a bit

1. Can be represented by two different levels of voltage in a computer circuit.
2. Is enough to tell the difference between two opposites, such as on and off.
3. Can be grouped with other bits to represent numbers, letters, or special symbols.
4. Is any pattern that has a com­monly understood meaning.

1. The difference between data and information is that
1. Data always contain informa­tion.
2. Data have a context; informa­tion may not.
3. Information has a context; data may not.
4. Information and data are the same thing.

1. An example of a network that processes decentralized input is
1. A television network.
2. An airline reservation system.

c. A telephone system.

1. An electronic encyclopaedia.
1. In a personal computer, the CPU is called the
1. RAM.
2. Microcomputer.
3. Processor.
4. Motherboard

Unit 3

Дата добавления: 2015-01-03