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Q.

The input and output operations are respectively similar to the operations,

A

read, read

B

write, write

C

read, writ

D

write, read

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DMA stands for?

A

Display Memory Access

B

Directly Memory Access

C

Device Memory Access

D

Direct Memory Access

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How many types of Interfacing?

A

2

B

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C

4

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3.

While performing read operation, one must take care that much current should not be

A

sourced from data lines

B

sinked from data lines

C

sourced or sinked from data lines

D

sinked from address lines

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4.

Which of the following is not true features of 8257?

A

It has three channels which can be used over three I/O devices.

B

Each channel has 16-bit address and 14-bit counter.

C

Each channel can transfer data up to 64kb.

D

Each channel can be programmed independently.

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5.

In 74LS245, if DIR is 1, then the direction is from

A

inputs to outputs

B

outputs to inputs

C

source to sink

D

sink to source

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