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Main idea



Which statement best expresses the main idea of the text? Why did you eliminate the other choices?

 1. Main storage is not a part of the processor.

 2. The CPU is made up of the control unit, the arithmetic-logical unit and internal memory.

 3. The CPU is composed of the arithmetic-logical unit and control unit only.

Understanding the passage

Decide whether the following statements are true or false (T/F) by referring to the information in the text. Then make the necessary changes so that the false statements become true.

T F

  1. The central processing unit is made up of three components.

 2. The CPU is responsible for all the activities taking place within a computer.

  3. The processor itself has three components.

  4. The control unit directs the flow of information within the processor.

  5. The arithmetic-logical unit of the processor is responsible for the interpretation of program instructions.

  6. The arithmetic-logical unit is also responsible for

choosing and comparing the appropriate information within a program.


T F

  7. The processor cannot operate on any information if that information is not in main storage.

  8. Secondary memory and internal memory are located in the same place in the computer system.

  9. Only after the data has been processed by the CPU can results be transmitted to an output device.

  10. Computers can solve problems more quickly if they operate on new information.

Locating information

Find the passages in the text where the following ideas are expressed. Give the line references.

........... 1. The processor is the control unit and the arithmetic-logical

unit.
........... 2. The processor operates on information that is in internal

storage.

........... 3. The CPU directs all the activities of the computer.

........... 4. The control unit coordinates the sequencing of events

within the processor.
........... 5. The word'computer'usually refers to the CPU plus

internal memory.

6. The CPU can get information from memory and put old or new information back into memory.

7. The arithmetic-logical unit does the calculations and decision-making operations.

Contextual reference

Look back at the text and find out what the words in boldtypeface refer to.

1. for theirparticular computer (1.6) ...............................

2. It determines which operations (I. 9) ...............................

3. These two unitsare made up of (1.15)

4. thatcan be in one of two states (1.16) ...............................

5. thatdirects the sequence (I. 20)

6. in whichthe actual arithmetic

operations (/. 25)

7. It also performs some kind of (I. 27)

8. on whichthe control unit and the

arithmetic-logical unit operate (I. 30) ...............................

9. wheremanual control operations (7. 34) ................................

10. It is used mainly when the computer (7. 36) ................................





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