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The following sequences shows the hierarchy of data organization from top level to the bottom. Which one of them is corr

The following sequences shows the hierarchy of data organization from top level to the bottom. Which one of them is correct? . field, character, record, file. record, file, character, field, file, record, character, field. file, record, field, character.

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The following sequences shows the hierarchy of data organization from top level to the bottom. Which one of them is corr

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  1. The following sequences shows the hierarchy of data organization from top level to the bottom. Which one of them is correct? field, character, record, file. record, file, character, field, file, record, character, field. file, record, field, character.

  2. Which of the following is not an octal number ? • 451. • 880. • 325. • 162.

  3. Which of the following is not a decimal number ? • 1001001 • 67542 • 79245 • 2A1017

  4. A computer uses the 8-bit two's complement representation to represent integers. The smallest and largest integer the computer can process are : • -8, 7. • -127, 127. • -256, 255. • -128, 127.

  5. The main advantage of two's complement representation over that of sign-and-magnitude representation is • With the same number of bits, two's complement representation can represent a wider range of integers. • With two's complement representation, substractions can be performed by addition. • In two's complement representation, only one bit pattern is used to represent the integer 0. • Program designing can be simplified with the use of two's complement representation

  6. The two's complement of the bit pattern 01101101 is : • 11101101. • 10010011. • 10110110. • 10010010.

  7. The two's complement of the bit pattern 01101010 is: • 11101101. • 10010011. • 10010110. • 10010010.

  8. How many bytes of memory locations are needed to store an English character and a Chinese character respectively? • one, one. • one, two. • two, two. • two, one.

  9. The decimal number corresponding to 0.01101(2) is • 0.2031. • 0.40625. • 1.625. • 0.8125.

  10. The decimal number corresponding to 0.11101(2) is • 0.90625. • 0.94025. • 1.625. • 0.8125.

  11. The decimal number corresponding to 110.11011(2) is • 7.2031. • 0.90625. • 11.625. • 6.84375.

  12. Which of the following binary number is normalized? • 11.110111. • 1.1111011. • 1.01101 × 10^-11. • 0.10111 × 10^101.

  13. The octal number corresponding to 110.11011(2) is • 7.73(8) • 6.66(8) • 6.666(8) • 5.3333(8)

  14. The octal number corresponding to 11110.111011(2) is: • 81.452(8) • 26.354(8) • 36.73(8) • 43.53(8)

  15. Arithmetic operations __________. • involve matching one data item to another to determine if the first item is greater than, equal to, or less than the other item • include addition, subtraction, multiplication, and division • use conditions with operators such as AND, OR, and NOT • sort data items according to standard, predefined criteria in ascending order or descending order

  16. Some manufacturers state access times in nanoseconds; a nanosecond (ns) is one __________ of a second • Billionth • Thousandth • Millionth • Hundredth

  17. As a rule, a 1-__________ (million pixel) digital camera is fine for screen displays such as photo communities, Web pages, and e-mail attachments • Kilopixel • Megapixel • Gigapixel • Millipixel

  18. Displays with higher resolution use a _________ image . • smaller number of pixels, providing a rougher • smaller number of pixels, providing a smoother • greater number of pixels, providing a smoother • greater number of pixels, providing a rougher

  19. Manufacturers state video memory in __________ • Kilobytes • Megabytes • Gigabytes • Millibytes

  20. __________ printers can print text at speeds of up to 40 pages per minute • Dot-matrix • Ink-jet • Laser • Thermal

  21. Two commonly used audio output devices are __________ • printers and speakers • monitors and printers • headsets and monitors • speakers and headsets

  22. Storage devices access items in __________. • Billionths of a second (nanoseconds) • Thousandths of a second (milliseconds) • Millionths of a second (megaseconds) • Hundredths of a second (centiseconds)

  23. What is a binary system? • A binary system is a two-state numbering system consisting of 0 and 1. • Each 0 or 1 is called a bit (short for binary digit). • Bits are combined into groups of eight bits called bytes. • 0 can be represented by electricity being off and 1 by electricity being on.

  24. Select valid statement? • 8 bits = 1 byte = 1 character • 8 bytes = 1 bit = 1 character • 8 bits = 1 byte = 8 characters • 8 bytes = 1 bit = 8 characters

  25. What is the highest binary number that can be referred to on a three position jumper block? • 4 • 6 • 7 • F

  26. What is the highest binary number that can be referred to on a four position jumper block? • 4 • 6 • 7 • F

  27. How may standard levels interrupts are provided on the 8-bit ISA bus (XT-class computer)? • 12 • 16 • 4 • 8

  28. Serial ports are assigned interrupts to avoid conflict between the ports. Which port(s) should be assigned to IRQ4? • COM1 • COM2 • COM4 • COM3

  29. IRQ6 is typically reserved for: • The floppy • The keyboard controller • The modem • LPT2

  30. The CPU or central processing unit of a computer is organized into two main units. The two units are the control unit and the • Arithmetic unit • Logic unit • Arithmetic-logic unit • Data unit

  31. What's the largest memory size if the addres bus of the computer system bus width is 3 bytes? • 16 kilobytes. • 16 megabytes. • 64 kilobytes. • 64 megabytes.

  32. Random access memory is located in: • registers on the CPU. • a chip near the CPU. • bus lines on a microprocessor. • magnetic devices external to the computer.

  33. What's the largest memory size if the addres bus of the computer system bus width is 3 bytes? • 16 kilobytes. • 16 megabytes. • 64 kilobytes. • 64 megabytes.

  34. What's the decimal number the binary number 00101011 represents? • 11 • 31 • 65 • 43

  35. A bit can represent how many different values? • 1 • 2 • 4 • 3

  36. Which of the following is NOT a type of motherboard expansion slot? a) ISA b) PCI c) AGP d) ATX

  37. Which of the following is NOT a type of computer hard drive? a) IDE b) FDD c) SCSI d) EIDE

  38. Which of the following retains the information it's storing when the power to the system is turned off? a) CPU b) ROM c) RAM d) DRAM e) DIMM

  39. How can you tell that a particular ribbon cable should only be used to connect a floppy drive? a) it's white b) it has a red line along one edge c) it's wider than all the other ribbon cables d) it has a twist in it

  40. What is BIOS an acronym for? a) bootstrap initial operating system b) basic input output startup c) boot initial operating startup d) basic input output system

  41. Which of the following is NOT a type of RAM? a) SIMM b) DIMM c) ROM d) SLIPP

  42. What does FDISK do? a) performs low-level formatting of the hard drive b) fixes bad sectors on the hard drive c) recovers lost clusters on the hard drive d) creates partitions on the hard drive

  43. What type of connector is used to plug a telephone line into a modem? a) COM1 b) RJ-45 c) RJ-11 d) RJ-10

  44. What is different between AT and ATX power supplies?. a) They are identical except for their shape. b) AT supplies use a single P1 power connector while ATX uses P8 and P9 c) AT power supplies run on 120V AC current while ATX uses 220V AC d) AT supplies use P8 and P9 power connectors while ATX uses a single P1 connector.

  45. What are the four key functions of a computer system? a) input, processing, output, and storage b) keyboard, display, memory, and disk drive c) word processing, spreadsheets, database, and contact management d) read, write, calculate, and display e) bits, bytes, words, and OSI

  46. The hard disk drive magnetic surface is divided in concentric circles called tracks, and each track is divided into segments called sectors. What is the name given to the set of tracks that have the same spatial position on all discs present in the hard disk drive? a) Side b) Face c) Cylinder d) Head

  47. How many information bytes can be stored in a sector? a) 128 b) 256 c) 512 d) 1024

  48. The hard disk drive capacity is defined by its formatting pattern. We call the hard disk drive formatting pattern as: a) FAT b) VFAT c) Cluster d) Geometry

  49. What is the maximum storage capacity on FAT-16 system? a) 504 MB b) 2 GB c) 8.4 GB d) 10 GB

  50. Where is stored the location of the first cluster of a file? a) Directory b) FAT c) VFAT d) Inside the file itself

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