Test: Peripheral Devices

QUESTION: 1

In a microcomputer, wait states are used to

A.
make the processor wait during a DMA operation.
B.
make the processor wait during an interrupt processing.
C.
make the processor wait during a power shutdown.
D.
interface slow peripherals to the processor.

Solution:

QUESTION: 2

What must be.the contents of the control word of Intel 8255 for mode 0 (operation) and for the following ports configuration?
ort A - output, Port B - output
Port C_lower - 0utput, Port C_upper - lnput

A.
85 H
B.
86 H
C.
87 H
D.
88 H

Solution:

QUESTION: 3

A ‘DMA’ Transfer implies

A.
direct transfer of data between memory and accumulator.
B.
direct transfer of data between memory and I/O devices without the use of μP.
C.
transfer of data exclusively within μP registers.
D.
a fast transfer of data between μP and I/O devices.

Solution:

The DMA is a process of high speed direct data transfer between memory and external peripherals (I/O device) without programming intervention.

QUESTION: 4

Match List-I (Request) with List-ll (Device) and select the correct answer using the codes given below the lists:

A.
a
B.
b
C.
c
D.
d

Solution:

QUESTION: 5

Direct memory Access channel (DMA) facilitates data to move into and out of the system

A.
one first come first serve basis
B.
without equal time delay
C.
without subroutine
D.
without program intervention

Solution:

QUESTION: 6

Consider the following statements associated with microprocessors:
1, Debug is synonymous with exponent.
2. Direct-Memory Access Channel (DMA) facilitates to move into and out of the system without program interruption.
3. Double precision employs double signal speed.
4. Dump means copying data from internal storage to external storage.

Which of the statements given above are correct?

A.
2 and 4
B.
1, 2 and 4
C.
2 and 3
D.
1,3 and 4

Solution:

QUESTION: 7

Bootstrap is a technique designed

A.
to transfer control to specified location
B.
to suspend the main program for a while
C.
to bring itself into a desired state by means of its own action
D.
none of the above

Solution:

QUESTION: 8

For which of the following devices, is DMA the most suitable?

A.
Keyboard
B.
Mouse
C.
Joy stick
D.
Hard disc

Solution:

QUESTION: 9

A USART chip provides

A.
half duplex operation
B.
full duplex operation
C.
duplex operation
D.
full duplex operation but cannot work in asynchronous mode

Solution:

QUESTION: 10

The synchronization between microprocessor and memory is done by

A.
ALE signal
B.
HOLD signal
C.
READY signal
D.
None of these

Solution:

10 Questions MCQ Test Topicwise Question Bank for Electronics Engineering | Test: Peripheral Devices

In a microcomputer, wait states are used to

What must be.the contents of the control word of Intel 8255 for mode 0 (operation) and for the following ports configuration?
ort A - output, Port B - output
Port C_lower - 0utput, Port C_upper - lnput

A ‘DMA’ Transfer implies

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