Microprocessor and Interfacing (3160712) MCQs

MCQs of Assembly Language Programming Basics

Showing 11 to 19 out of 19 Questions
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11.

Which instruction is used to load Program Counter?

(a)

SPHL
(b)

PCHL
(c)

LHLD
(d)

XTHL
Answer:

Option (b)

12.

Which instruction is used to load Stack Pointer?

(a)

SPHL
(b)

PCHL
(c)

LHLD
(d)

XTHL
Answer:

Option (a)

13.

Which instruction is used to complement Accumulator?

(a)

CMC
(b)

CMA
(c)

CPA
(d)

CPE
Answer:

Option (b)

14.

Calculate Execution time of MVI A,32H if clock frequency is 2MHz.

(a)

2 μsec
(b)

0.5μsec
(c)

7.5μsec
(d)

3.5μsec
Answer:

Option (d)

15.

How much time 8085 will take to execute LDA 16bit  instruction if the clock  frequency is 2MHz.

(a)

6.5 μsec
(b)

2.5μsec
(c)

7.5μsec
(d)

3.5μsec
Answer:

Option (a)

16.

Which stack is used in 8085 microprocessor?

(a)

FIFO
(b)

FILO
(c)

LIFO
(d)

LILO
Answer:

Option (c)

17.

Which addressing mode is not applicable to 8085?

(a)

Immediate
(b)

Implicit
(c)

Relative
(d)

Register
Answer:

Option (c)

18.

Identify the correct execution sequence of RET instruction from the following.

(a)

Fetch,MEMW,MEMR
(b)

Fetch, MEMR,MEMR
(c)

Fetch,MEMR,MEMW
(d)

Fetch, MEMW,MEMW
Answer:

Option (b)

19.

Which instruction exchanges Top of the Stack with Register Pair.

(a)

SPHL
(b)

XCHG
(c)

XTHL
(d)

PCHL
Answer:

Option (a)

Showing 11 to 19 out of 19 Questions
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