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Is535

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Chapter 1 - Questions and Exercises

Matching Part 1. 1. 2. Q 3. F 4. N 5. H 6. T 7. S 8. U 9. B 10. M 11. C 12. G 13. I 14. A 15. J 16. P 17. V 18. R 19. K 20. E 21. D 22. L 23. O 24. W

Matching Part 2. 1. 1. B 2. C 3. E 4. F 5. A 6. G 7. D 8. H 9. I 10. J 11. K

Matching Part 3. 1. 1. D 2. L 3. R 4. V 5.
X
6. B 7. N 8. J 9.
Y
10. K 11. S 12. Q 13.
F
14. P 15. E 16. O 17.
U
18. W 19. A 20. G 21.
T
22. C 23. H 24. M 25. I
Matching Part 4. 26. 1. J 2. B 3. D 4. I 5. M 6. N 7. O 8. K 9. H 10. A 11. E 12. G 13. F 14. L 15. C 16.

True/False. 1. False. As a result of computers, fewer jobs are currently available in manufacturing than in service industries. 2. True. 3. False. Manual data processing does not use a computer. 4. False. Data consists of raw facts, while information consists of data that have been processed. 5. False. The smallest data unit that the computer can use is the bit. 6. True. 7. False. 1000.27 is an example of a numeric field. 8. True. 9. True. 10. True. 11. False. CPU refers to central processing unit. 12. False. Examples of input/output devices include printers, video displays, and disk drives. 13. True. 14. False. The operating system is an example of system software. 15. True. 16. False. Machine language programs are written in binary. 17. True. 18. False. Assemblers and compilers generate object programs; interpreters do not. 19. True. 20. False. Subroutines are designed in the planning step of the programming process. 21. False. Documentation should include a flowchart, a copy of the program, and other things that describe the program. 22. False. The process of writing the instructions of a computer program is called coding. 23. False. Logic errors are found when a program is tested.

Multiple Choice. 1. 2. D 3. C 4. E 5.
C
6. A 7. C 8.
A
9. B 10. C 11.
D
12. D 13. D 14.
B
15. C 16. A 17.
B
18. A

Short Answer.

1. Note: The student may have different answers than those shown below. * Many products are manufactured by computer-controlled robots. * Inventory-control. * Increase in number of people working at home. 2. Where should the data be stored?
After being stored, how are data found again?
How should data be updated or maintained?
How should data be organized?
How are privacy and security issues handled?
What happens if data are destroyed? 3. Note: The student may have different answers than the one described as follows: A teacher has a database to maintain grade records for each of her classes. Each class is stored as a separate file. There is one record for each student. Records consist of the following fields: name, test1 score, test2 score, and test 3 score. Name consists of alphabetic characters; the test scores consist of numeric characters. 4. Numbers, a decimal point, and a positive or negative sign. 5. Any characters are allowed. 6. The computer can only execute machine-language instructions. Instructions written in other languages must be translated. 7. Assemblers and compilers generate object programs; interpreters do not. Assemblers translate assembly language programs; compilers and interpreters translate high-level programs. 8. The steps are: * Understand the program specifications. * Plan the program logic. * Code the program. * Get the program into machine-readable form. * Translate the coded program into machine language. * Test the program. * Document the program. 9. The advantages of subroutines and functions include the following: * Programs with subroutines generally cost less and take less time to modify because the programmer can test or change a subroutine with affecting the logic of the rest of the program. * A programmer can write a subroutine that can be used in other programs or multiple times in a single program. Creating and reusing code reduces programming cost by eliminating the need to write and test duplicate instructions. * Several programmers can work on the same program simultaneously because each may be assigned a separate module to write.

Chapter 2 - Questions and Exercises

Matching Part 1. 25. 1. U 2. M 3. E 4. Q 5. L 6. W 7. G 8. N 9. B 10. H 11. A 12. F 13. D 14. R 15. C 16. I 17. O 18. S 19. T 20. V 21. K 22. P 23. X 24. J 25.

Matching Part 2. 2. 1. U 2. Q 3. T 4. V 5. N 6. H 7. A 8. I 9. W 10. B 11. J 12. F 13. AA 14. O 15. D 16. G 17. R 18. M 19. K 20. X 21. P 22. C 23. E 24. Y 25. L 26. S 27. Z

Matching Part 3. 2. 1. C 2. E 3. B 4. C 5. D 6. D 7. A 8. F 9. B 10. B 11. B 12. D 17.

True/False. 1. True. 2. False. Flowcharts show the steps. They do not show why a particular step has been done. 3. False. Because there are many correct solutions to a programming problem, not all flowcharts drawn to solve a particular problem will be identical. 4. False. Terminal symbols are used at the beginning and end of a program and at the beginning and end of a subroutine. 5. True. 6. True. 7. False. When a WRITE instruction is executed, the contents of the input area are the same. 8. False. If a program has two input files and generates one report, two input areas and one output area are assigned to the program. 9. True. 10. False. An endless, or infinite, loop results from executing a loop that has no way to terminate. 11. False. Suppose the first record read into storage contains the name SANDY SIMPSON, and the second record contains the name ED JONES. Even though ED JONES contains fewer characters than SANDY SIMPSON, no part of the name SANDY SIMPSON will be left in storage when ED JONES is read. 12. True. 13. True. 14. False. If input consists of records, each of which contains a name and an address, then output does not need to contain both a name and an address. 15. True. 16. True. 17. False. The expression 8 * INTEREST-RATE is the correct expression to multiply INTEREST-RATE by 8. 18. False. The expression 17\2 causes the computer to do integer division to divide 17 by 2 giving a result of 8. 19. True. 20. False. Two types of subroutines are internal and external. 21. True. 22. True.

Multiple Choice. 19. 1. A 2. C 3. D 4. A 5. B 6. C 7. B 8. A 9. C 10. C 11. A 12. B 13. A 14. B 15. A 16. C 17. B 18. C 19. B 20. D 21. B 22. C 23. D 24. A 25. D 26. B

Short Answer. 1. (1) Drawing a flowchart gives the programmer a good visual reference of what the program will do; (2) Flowcharts serve as program documentation; (3) Flowcharts provide a method for easy desk checking. 2. One programmer’s flowchart for a particular problem may not be the same as a different programmer’s flowchart for the same problem. 3. When the flow is not top-to-bottom or left-to-right on the page. 4. a. Preparation | | b. Flowline | | c. Connector | | d. Off-page connector | | e. Terminal | | f. Process | | g. Decision | | h. Input/output | | i. Internal subroutine | | j. External subroutine | | k. Annotation | | 5.

6. They do exactly the same thing; both instructions store the number 5 in VALUE. 7. a. 8 * 2 * 2 / 16 – 2 ^ 3 + 5 8 * 2 * 2 / 16 – 8 + 5 16 * 2 / 16 – 8 + 5 32 / 16 – 8 + 5 2 – 8 + 5 -6 + 5 -1 b. 5 \ 2 * 5
5 \ 10
0
c. (1 + 6) * 2 / 7 – 4 MOD 3 7 * 2 / 7 – 4 MOD 3 14 / 7 – 4 MOD 3 2 – 4 MOD 3 2 – 1 1 d. 25 / (5 + 20) * ((3 ^ 3 / 3) – 1 * 4) 25 / (5 + 20) * ((27 / 3) – 1 * 4) 25 / (5 + 20) * ( 9 – 1 * 4) 25 / 25 * (9 – 1 * 4) 25 / 25 * (9 – 4) 25 / 25 * ( 5) 1 * (5)
5
8. a. (A / 3 + 5 / B) ^ .5 b. (3 + W ^ 4) / (A / B) c. A + X / 2 d. (4 + A) / (C + 7) e. (A + B) /3 9. a. F b. F c. T d. T e. F f. T g. T h. F 10. 11. a. Apple b. The content of the storage location named Orange c. 57823 12. a. The program calculates and displays an average for each input record. The average includes the two highest grades for each input record. b. Initialize c. Do Initialize d. Read a Record 12. The output is 1 line containing the number 2.

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