Pakistan study notes for Matric, Intermediate, B.A, B.COM BSC, M.A, BCS. Free Pakistani Urdu educational school, colleges and University notes.

UNIT 5: DATA REPRESENTATION – Fill in the blanks

Fill in the blanks.

i. The data, which consists of alphabets as well as numbers, is known as Alphanumeric Data.

ii. The number, which is in the exponential form, is called Floating point number.

iii. The Information is a meaningful, useful, and processed form of data.

iv. Eight (8) is a base of octal system.

v. The maximum digit of hexadecimal number system is 16.

vi. ASCII stands for American Standard Code for Information Interchange.

vii. A floating-point number consists of two parts known as Mantissa and Exponent.

viii. The method of 2’s complement arithmetic is commonly used in computers to handle negative numbers.

ix. In BCD code each decimal digit is represented by a binary code of four bits.

x. Computers can recognize a total of 256 different characters.

1. The bit is the smallest unit of memory

2. A system used to convert information into numbers is called number system.

3. The total number of digits used in a number system is called its base or radix.

4. The number system with a base of 2 is called binary number system.

5. The number system with a base of an 8 is called octal number system.

6. The number system with a base of 10 is called decimal number system.

7. The number system with a base of 16 is called hexadecimal number system.

8. The term bit means binary digits.

9. The number system used in our daily routine is decimal number system.

10. Decimal number system consists of 10 digits.

11. Binary number system is based on 2 digits the 0 and 1.

12. Computer can process only binary number system.

13. Octal number system consists of 8 digits i.e. 0 to 7.

14. One octal number represents 3 binary digits.

15. One hex number represents 4 binary digits.

16. Hexadecimal number system consists of 16 numbers.

17. Sixteen numbers of hexadecimal number system are 0—9, A, B, C, D, E and F.

18. In hexadecimal number system A to E letters represent 10, 11, 12, 13, 14 and 15 representative

19. To convert decimal number to its binary equivalent divide the number by 2 repeatedly till quotient becomes zero.

20. We divide the decimal number by 8 to convert decimal number to its octal equivalent.

21. We divide (lie decimal number by 16 to convert decimal number to its hex equivalent.

22. In decimal to binary, octal and hexadecimal conversion remainders are noted in reverse order as answer.

23. To convert binary number to decimal equivalent all the digits are multiplied with 20, 21, 22 etc.

24. To convert octal number to decimal all the digits are multiplied with 80, 81, 82 etc.

25. In binary to octal conversion, binary digits are grouped into 3 bits.

26. In binary to hexadecimal conversion, binary digits are grouped into 4 bits.

27. Write the base 2 number zero, one, one, zero 01102

28. Write the first ten number of decimal number system 0, 1, 2, 3, 4, 5, 6,7, 8, 9.

29. Write the 16 symbols used in hexadecimal system.

 0, 1, 2, 3, 4, 5, 6, 7, 9, 9, A, B, C D, F and F

30. In binary addition sum of 0 + 0 = 0

31. In binary addition sum of 0 + 1 = 1

32. In binary addition sum of I + 1 = 0 with carry of 1.

33. In binary addition sum of 1 + 1 + 1 = 1 with carry of 1.

34. In binary subtraction 0 – 0 = 0

35. In binary subtraction 1 – 0 = 1

36. In binary subtraction 1 – 1 = 0

37. In binary subtraction 0 – 1 = 1 with a borrow of 1.

38. The binary number which follows 100 is 101.

39. The binary number which follows 1000 is 1001.

40. The binary number which follows 011 is 100.

41. The decimal number E is equal to 14 in decimal number system.

42. The decimal number system is widely used in daily life.

43. The binary number system has proved the most efficient system for machine use.

44. Digital computers are built from components that have two states.

45. Data are the words, numbers and graphics that describe people, events, things and ideas.

46. Data means collection of facts.

47. When data is arranged in a suitable manner, then it is called information.

48. In computers data items can be classified into three types which are numeric, alphabetic and alphanumeric.

49. Integer data consists of positive or negative whole numbers including zero.

50. The data that contains numbers which may be fractions is called real data.

51. Alphanumeric data contains a combination of numerals and letter of alphabets including special characters.

52. The word BIT stands for either of the binary digits 0 or 1.

53. The decimal number system consists of 10 digits namely 0 to 9.

54. Computers understand only the binary number system.

55. A few of the codes represent the data are Binary. BCD. ASCII and EBCDIC.

56. The 2s complement of a binary number is formed by adding 1 to the LSB of 1’s complement.

57. LSB stands for Least Significant Bit.

58. MSB stands for Most Significant Bit.

59. 1’s complement of 101 is 010

60. ELICOIC’ code was primarily used by international Business Machine (IBM).

61. EBCDIC is a 8 bit code.

62. ASCII stands for American Standard Code for information Interchange.

63. ASCII has 256 character and symbols.

64. EBCDIC stands for Extended Binary Coded Decimal Interchange Code.

65. BCD stands for Binary Coded Decimal.

66. 8 bits have 256 combinations.

67. Modern computer use 8 bit codes, which can accommodate 36 alphanumeric characters and 220 special characters.

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