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Q.

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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MCQ

1.

Which pin is used to blank the display during digit switching?

A

WR

B

IR

C

BD

D

DB

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2.

In which mode, the CPU periodically reads an internal flag of 8279 to check whether any key is pressed or not with key pressure?

A

Interrupt mode

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Polled mode

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Decoded Mode

D

Encoded Mode

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3.

How many types of Interfacing?

A

2

B

3

C

4

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5

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4.

The example of output device is

A

CRT display

B

7-segment display

C

Printer

D

All of the mentioned

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5.

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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