Skills Check

Skills Check

Question 16.1

1. When a single incorrect digit is entered, an error- detecting code

  1. sometimes will detect the error.
  2. always will detect the error but may not be able to correct it.
  3. always will detect and correct the error.

1.

a

Question 16.2

2. If a U.S. Postal Service money order is numbered 1012065994?, where? indicates that the last digit is obliterated, ? is ____________.

2.

1

Question 16.3

3. If the first five digits of a valid U.S. Postal Service money order are rearranged, the resulting number will ____________ have the same check digit as the original number.

  1. always
  2. sometimes
  3. never

3.

a

Question 16.4

4. If the number is a valid Postal Service money order number and the number is also a valid Postal Service money order number, the value of is ____________.

4.

3

Question 16.5

5. If is a valid U.S. Postal Service money order number, then is evenly divisible by

  1. 9.
  2. 10.
  3. 11.

5.

a

692

Question 16.6

6. The sum of the digits of a correctly coded American Express Travelers Cheque identification number is evenly divisible by ___________.

6.

9

Question 16.7

7. Is the number 105408970012 a legitimate airline ticket number?

  1. Yes.
  2. No, but if the final digit is changed to a 5, the resulting number, 105408970015, is legitimate.
  3. No, but if the final digit is changed to a 3, the resulting number, 105408970013, is legitimate.

7.

b

Question 16.8

8. If the digits of a VISA travelers cheque, excluding the check digit, add up to 36, the check digit is _______.

8.

0

Question 16.9

9. If 8103955 is a valid Avis identification number, which of the three following numbers is not detected as invalid by the Avis check-digit scheme?

  1. 1103955
  2. 8173955
  3. 8703955

9.

a; b

Question 16.10

10. If an American Express Travelers Cheque is numbered X425036791, where indicates that the first digit is obliterated, is _________.

10.

8

Question 16.11

11. If the first two digits of a valid airline ticket identification number are transposed, the resulting number will _________ be valid.

  1. always
  2. sometimes
  3. never

11.

b

Question 16.12

12. A correctly coded UPC number has a weighted sum that is evenly divisible by _________.

12.

10

Question 16.13

13. Identify each binary UPC code below as the manufacturer’s part of the number or as the product part of the number.

  1. 100111
  2. 0011001
  3. 0001011

13.

(a) Product (b) Manufacturer (c) Manufacturer

Question 16.14

14. The check digit that should be appended to the UPC code 0-14300-25433 is ____________.

14.

9

Question 16.15

15. The bank routing number error detection scheme detects

  1. all transportation and most single-digit errors.
  2. all single-digit errors and most transpositions.
  3. all single-digit errors and all transpositions.

15.

b

Question 16.16

16. The check digit that should be appended to the bank routing number 01500085 is __________.

16.

9

Question 16.17

17. The bank routing number error detection scheme detects

  1. the same errors as the UPC scheme.
  2. fewer errors than the UPC scheme.
  3. more errors than the UPC scheme.

17.

c

Question 16.18

18. A correctly coded 10-digit ISBN has a weighted sum that is evenly divisible by __________.

18.

11

Question 16.19

19. Suppose the 10-digit ISBN 0-1750-3549-0 is reported incorrectly as 0-1750-3540-1. Which of the following statements is true?

  1. This error will not be detected by the check digit.
  2. While this particular error will be detected, the check digit does not detect all 2-digit errors in ISBNs.
  3. All 2-digit errors in a 10-digit ISBN are detectable by the check digit.

19.

b

Question 16.20

20. If a 10-digit ISBN number has an in the check-digit position, the remainder of the weighted sum divided by 11 is ________.

20.

10

Question 16.21

21. A valid 13-digit ISBN has a weighted sum evenly divisible by

  1. 9.
  2. 10.
  3. 11.

21.

b

Question 16.22

22. The ISBN-10 error detection scheme detects _______% of single-digit errors and ________% of transposition errors.

22.

100%; 100%

Question 16.23

23. If an error in an identification number is made by transposing the first and third digits, the error

  1. usually is detected by the UPC scheme.
  2. always is detected by the bank scheme.
  3. always is detected by the ISBN-10 scheme.

23.

c

Question 16.24

24. If the weighted sum of the first 12 digits of a 13-digit ISBN is 56, the 13th character is ________.

24.

4

Question 16.25

25. If the ZIP code for a home begins with a 9, in which part of the United States is it located?

  1. The East
  2. The Midwest
  3. The West

25.

c

Question 16.26

26. The sum of the 10 digits of a Postnet code number is evenly divisible by _______.

26.

10

Question 16.27

27. If a scanner misreads exactly one bar of a Postnet code, the computer will

  1. not always detect the error.
  2. always detect the error but will not always be able to correct it.
  3. always detect the error and correct it.

27.

c

693

Question 16.28

28. Which of the codes listed below uses a check digit?

  1. Soundex
  2. Social Security
  3. VIN

28.

c

Question 16.29

29. Errors in ID numbers of the form

  1. are called ___________ errors.
  2. are called ____________ errors.
  3. are called ______________ errors.

29.

(a) single-digit (b) adjacent transposition (c) jump transposition

Question 16.30

30. The multiplication by 13 encoding scheme detects

  1. ________% of single-digit errors.
  2. ________% of adjacent transposition errors.
  3. ________% of jump transposition errors.

30.

(a) 100% (b) 100% (c) 100%