Computer Science: An Overview – 13th Edition | Brookshear & Brylow | Comprehensive Test Bank

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COMPUTER SCIENCE: AN OVERVIEW
13TH EDITION

CHAPTER NO. 01: DATA REPRESENTATION

MULTIPLE CHOICE QUESTION & ANSWERS

1. Which of the following Boolean operations produces the output 1 for the fewest
number of input patterns?

A. AND B. OR C. XOR

ANSWER: A

2. Which of the following best describes the NOR operation?

A. An XOR followed by a NOT B. An OR followed by a NOT
C. A NOT followed by an OR C. An AND followed by a NOT

ANSWER: B

3. Which of the following bit patterns cannot be expressed in hexadecimal notation?

A. 11111111 B. 1001 C. 110011 D. 100000000001

ANSWER: C

4. Which of the following is the binary representation of 6 5/8?

A. 110.11 B. 10.011 C. 110.101 D. 100.101

ANSWER: C

5. Which of the following bit patterns represents the value 9 in two’s complement
notation?

A. 00011010 B. 11111011 C. 00001001 D. 11111011

ANSWER: C

,6. Which of the following bit patterns represents the value -9 in two’s complement
notation?

A. 00011010 B. 111110111 C. 10001001 D. 11111011

ANSWER: B

7. What is the result of the following addition problem (using two’s complement
notation)?

00001111
+ 10101010

A. 011000101 B. 10111001 C. 01010101 D. 10110101

ANSWER: B

8. What is the result of the following subtraction problem (using two’s complement
notation)?

00001111
- 10101010

A. 011000101 B. 10111001 C. 01010101 D. 10110101

ANSWER: A

9. In which of the following addition problems (using two’s complement notation) does
an overflow error occur?

A. 0011 B. 1100 C. 1100 D. 0100
+ 1010 + 0100 + 1100 + 0100

ANSWER: D

10. Which of the following representations in two’s complement notation represents the
largest value?

A. 00000010 B. 11110000 C. 00000001 D. 11111111

,ANSWER: A

11. Which of the following representations in two’s complement notation represents the
smallest value?

A. 00000010 B. 11110000 C. 00000001 D. 11111111

ANSWER: D

12. Which of the following bit patterns (represented in hexadecimal notation) represents a
negative number in two’s complement notation?

A. 3F B. 55 C. A6 D. 7E

ANSWER: C

13. Which of the following bit patterns (represented in hexadecimal notation) represents a
positive number in two’s complement notation?

A. 9F B. F7 C. A8 D. 7E

ANSWER: D

14. What value is represented by the bit pattern 01011100 when interpreted using
floating-point format in which the most significant bit is the sign bit, the next three bits
represent the exponent field in excess notation, and the last four bits represent the
mantissa?

A. -1 1/2 B. 1 1/2 C. -3/8 D. 3/8

ANSWER: B

15. Which of the following values cannot be stored accurately using a floating-point
format in which the most significant bit is the sign bit, the next three bits represent the
exponent field in excess notation, and the last four bits represent the mantissa?

A. 2 1/2 B. 3/16 C. 7 D. 6 1/4

ANSWER: D

, 16. Which of the following bit-patterns represents the smallest value using the floating-
point format in which the most significant bit is the sign bit, the next three bits represent
the exponent field in excess notation, and the last four bits represent the mantissa?

A. 01001000 B. 01011000 C. 00101000 D. 01111000

ANSWER: C

17. Which of the following data storage systems provides the most efficient random
access to individual data items?

A. Main memory B. Magnetic disk C. CDs/DVDs
D. Flash drives


ANSWER: A

18. Which of the following storage systems is best suited for storing and retrieving long
strings of data such as music that are processed in a sequential order?

A. Main memory B. Magnetic disk C. CDs/DVDs D.
ROM chips

ANSWER: C

19. Which of the following mass storage system does not require physical motion?

A. Magnetic tape B. Magnetic disk C. CDs/DVDs D.
Flash drives

ANSWER: D

20. Assuming that each of the following bit patterns originally had even parity, which one
contains an error?

A. 100110100 B. 110000011 C. 010011000 D. 100011001

ANSWER: C