Microprocessor and Interfacing (3160712) MCQs

MCQs of 8085 Microprocessor

Showing 11 to 10 out of 20 Questions
1 2
11.

Which signal indicates that a peripheral such as DMA Controller is requesting the use of address & data buses?

(a)

HOLD 
(b)

HLDA
(c)

INTA
(d)

READY
Answer:

Option (a)

12.

______signal is used to delay the microprocessor read or write cycles.

(a)

HOLD 
(b)

HLDA
(c)

RESET
(d)

READY
Answer:

Option (d)

13.

When the signal on______ pin goes low, the Program Counter is set to zero, the buses are tri-stated.

(a)

HLDA
(b)

INTA
(c)

RESET IN
(d)

RESET OUT
Answer:

Option (c)

14.

When instruction is fetched from memory it is loaded into _______.

(a)

Instruction Register
(b)

Temporary Register
(c)

Accumulator
(d)

Flag Register
Answer:

Option (a)

15.

The operation performed in one clock period is termed as ______

(a)

T-States
(b)

Machine Cycle
(c)

Instruction Cycle
(d)

Fetch Cycle
Answer:

Option (a)

16.

Time required by the microprocessor to complete an operation  is termed as ______

(a)

T-states
(b)

Machine Cycle
(c)

Instruction Cycle
(d)

Fetch Cycle
Answer:

Option (b)

17.

Time required to complete execution of an instruction is termed as ______.

(a)

T-states
(b)

Machine Cycle
(c)

Instruction Cycle
(d)

Fetch Cycle
Answer:

Option (c)

18.

Calculate the ending address of EPROM chip, when starting address is 0000 H and chip size is 4 KB.

(a)

0FFF H
(b)

00FF H
(c)

007F H
(d)

07FF H
Answer:

Option (a)

19.

Calculate the ending address of EPROM chip, when starting address is 0000 H and chip size is 8 KB.

(a)

0FFF H
(b)

1FFF H
(c)

007F H
(d)

07FF H
Answer:

Option (b)

20.

Calculate the ending address of EPROM chip, when starting address is 4000 H and chip size is 8 KB.

(a)

5FFF H
(b)

7FFF H
(c)

05FF H
(d)

07FF H
Answer:

Option (a)

Showing 11 to 10 out of 20 Questions
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