Microprocessor and Interfacing (3160712) MCQs

MCQs of 8085 Microprocessor

Showing 1 to 10 out of 20 Questions
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1.

Beginning of stack is defined by loading a 16-bit address in the______

(a)

Stack pointer
(b)

Program counter
(c)

Program Status Word
(d)

Auxillary Flag
Answer:

Option (a)

2.

Microprocessor uses ______ register to sequence the execution of instructions.

(a)

Program Counter
(b)

Stack Pointer
(c)

PSW
(d)

HL register pair
Answer:

Option (a)

3.

16 address lines are capable of addressing______

(a)

64K
(b)

65K
(c)

256K
(d)

128K
Answer:

Option (a)

4.

Largest number appear on 8-bit data bus is______

(a)

(128)10
(b)

(255)10
(c)

(256)10
(d)

(64)10
Answer:

Option (b)

5.

In 8085, Status pin S0=1, S1=0 indicates _______mode.

(a)

Read
(b)

Write
(c)

Halt
(d)

Opcode Fetch
Answer:

Option (b)

6.

In 8085, Status pin S0=0, S1=1 indicates _______mode.

(a)

Read
(b)

Write
(c)

Halt
(d)

Opcode Fetch
Answer:

Option (a)

7.

In 8085, status pin S0=0, S1=0 indicates _______mode.

(a)

Read
(b)

Write
(c)

Halt
(d)

Opcode Fetch
Answer:

Option (c)

8.

In 8085, Status pin S0=1, S1=1 indicates _______mode.

(a)

Read
(b)

Write
(c)

Halt
(d)

Opcode Fetch
Answer:

Option (d)

9.

To operate a system at 8 MHz, the crystal should have a frequency of _____.

(a)

4 MHz
(b)

16 MHz
(c)

8 MHz
(d)

32 MHz
Answer:

Option (b)

10.

______ is a non maskable interrupt.

(a)

RST 5.5
(b)

RST 7.5
(c)

INTR
(d)

TRAP
Answer:

Option (d)

Showing 1 to 10 out of 20 Questions
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