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Q.

The advantage of I/O mapped devices to memory mapped is ___________

A

The former offers faster transfer of data

B

The devices connected using I/O mapping have a bigger buffer space

C

The devices have to deal with fewer address lines

D

No advantage as such

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MCQ

1.

A hard disk with 20 surfaces will have _____ heads.

A

10

B

5

C

1

D

20

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2.

_____ pushes the heads away from the surface as they rotate at their standard rates.

A

Magnetic tension

B

Electric force

C

Air pressure

D

None of the mentioned

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3.

The system is notified of a read or write operation by ___________

A

Appending an extra bit of the address

B

Enabling the read or write bits of the devices

C

Raising an appropriate interrupt signal

D

Sending a special signal along the BUS

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4.

One of the most widely used schemes of encoding used is _________

A

NRZ-polar

B

RZ-polar

C

Manchester

D

Block encoding

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5.

The drawback of Manchester encoding is _________

A

The cost of the encoding scheme

B

The speed of encoding the data

C

The Latency offered

D

The low bit storage density provided

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