Final CSC from old tests
what is the largest positive integer that can be expressed in twos complement represent by eight bits?
127 bits
If a term paper consisted 42 pages, each containing 40 lines of 100 symbols each (counting each space as a symbol), was to be encoded using Unicode, how many bytes of storage space would be required?
336,000 bytes
13. Which of the following bit patterns (represented in hexadecimal notation) represents a positive number in two's complement notation? A. 7F B. F7 C. A8 D. 8A
ANSWER: A
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
8. What is the result of the following subtraction problem (using two's compliment notation)? 00001111 - 10101010 A. 011000101 B. 10111001 C. 01010101 D. 10110101
ANSWER: A
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
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
18. Which of the following storage systems is best suited for storing and retrieving long strings of data that are processed in their sequential order? A. Main memory B. Magnetic disk C. CDs/DVDs
ANSWER: C
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
19. Which of the following mass storage system does not require physical motion? A. Magnetic tape B. Magnetic disk C. DVDs D. Flash drives
ANSWER: D
26. Which of the following provides a compressed representation of an image by limiting the number of different pixel colors to 256, thereby enabling each pixel in an image to be represented by a single byte whose value indicates which of a palette of entries represents the pixel's color? A. ASCII B. MPEG C. JPEG D. GIF
ANSWER: D
