The Global Open University 2012-1st Year M.Sc Electronic Science Global open University Electronics of Digital System Design - Question Paper

35. Half adder circuit is ______?
a. Half of an AND gate
b. A circuit to add 2 bits together
c. Half of a NAND gate
d. none of above
36. Numbers are stored and
transmitted inside a computer in
a. binary form
b. ASCII code form
c. decimal form
d. alphanumeric form
37.The decimal number 127 may be
represented by
a. 1111 1111B
b. 1000 0000B
c. EEH
d. 0111 1111
38. A byte corresponds to
a. four bits
b. eight bits
c. 16 bits
d. 32 bits
39.A gigabyte represents
a.1 billion bytes
b. 1000 kilobytes
c. 230 bytes
d. 1024 bytes
40. A megabyte represents
a. one million bytes
b. 1000 kilobytes
c. 220 bytes
d. 1024 bytes
41. A Kb corresponds to
a. 1024 bits
b. 1000 bytes
c.210 bytes
d. 210 bits
42.A parity bit is
a. used to indicate uppercase letters
b. used to detect errors
c. is the 1st bit in a byte
d. is the last bit in a byte
43. Which of these devices are two
state.
a. lamp
b. punched card
c. magnetic tape
d. all the above
44. The output impedance of of a logic
pulser is
a. low
b. high
c. may be low or high
d. none of above
45. The number of LED display
indicators in logic probe are
a.1
b.2
c.1 or 2
d.4
45. In hexadecimal number system,A is
equal to decimal number
a.10
b.11
c.17
d.18
46. Hexadecimal number F is equal to
octal number
a.15
b.16
c.17
d.18
47. Hexadecimal number E is equal to
binary number
a.1110
b.1101
c.1001
d.1111
48. Binary number 1101 is equal to
octal number
a.15
b.16
c.17
d.14
49.Octal number 12 is equal to decimal
number
a.8
b.11
c.9
d. none
50. Decimal number 10 is equal to
binary number
a.1110
b.1000
c.1001
d.1010
51. Binary number 110011011001 is
equal to decimal number
a.3289
b.2289
c.1289
d.289
52. 1111+11111=
a.101111
b.101110
c.111111
d.011111
53. Binary multiplication 1*0=
a.1
b.0
c.10
d.11
54. 110012 -100012=
a.10000
b.01000
c.00100
d.00001
55. 10112*1012=
a.55
b.45
c.35
d.25
56.1110112*100012=
a.111101101
b.111101100
c.111110
d.1100110
57.4 bits is equal to
a. one nibble
b.1 byte
c. two byte
d. none of above
58. which is non-volatile memory
a. RAM
b. ROM
c. both
d. none
59. The contents of these chips are lost
when the computer is switched off?
a. ROM chips
b. RAM chips
c. DRAM chips
d. none of above
60. elaborate responsible for storing
permanent data and instructions.?
a. RAM chips
b. ROM chips
c. DRAM chips
d. none of above
61. Which parts of the computer
perform arithmetic calculations?
a. ALU
b. Registers
c. Logic bus
d. none of above
61. How many bits of info can
every memory cell in a computer chip
hold?
a. 0 bits
b. one bit
c. eight bits
d. two bits
62.What kind of computer chips are
stated to be volatile?
a. RAM chips
b. ROM chips
c. DRAM
d. none of above
63. Which generation of computer uses
more than 1 microprocessor?
a. 2nd generation
b. 5th generation
c.Third generation
d .none of above
64.Which generation of computer
developed using integrated circuits?
a. 2nd generation
b. 5th generation
c. 3rd generation
d. none of above
65. Which generation of computer was
developed from microchips?
a. 2nd generation
b. 3rd generation
c. 4th generation
d. none of above
66. RAM can be expanded to a
a. increase word size
b. increase word number
c. increase word size or increase word
number
d. none of above
67. Which memory is available in all
technologies
a. PROM
b. EEPROM
c. ROM
d. EPROM
68. Which memory does not require
programming equipment
a. PROM
b. EEPROM
c. ROM
d. EPROM
69. In CCD
a. small charge is deposited for logical 1
b. small charge is deposited for logical 0 or
c. small charge is deposited for logical 0 and
large charge for logical 1
d. none of above
70. The internal structure of PLA is
similar to
a. RAM
b. ROM
c. both RAM or ROM
d. neither RAM nor RAM

Earning:   Approval pending.