50. EA stands for ?
A.Effective address
B.Effective absolute
C.Effective add
D.End address

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51. The operating mode of I/O devices is __________ for different devices ?
A.Same
B.Different
C.Optimum
D.Medium

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52. ___________ processor has to check continuously till device becomes ready for transferring the data ?
A.DMA
B.Interrupt-initiated I/O
C.IOP
D.DCP

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53. Instruction that are used for reading from memory by an IOP called ?
A.Commands
B.Pulses
C.Blocks
D.Interrupt

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54. Which memory is assembled between main memory and CPU ?
A.Primary Memory
B.Secondary Memory
C.Registers
D.Cache Memory

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55. A number system that uses only two digits, 0 and 1 is known as ?
A.Octal number system
B.Hexadecimal system
C.Binary system
D.Decimal system

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56. Which system has a base or radix of 10 ?
A.Binary
B.Octal
C.Hexadecimal
D.Decimal

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