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Microprocessor 8085

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

8085 microprocessor has how many pins

a)

49

b)

31

c)

40

d)

20

2.

What is SIM

a)

Set Interrupt mask

b)

Sort Interrupt mask

c)

Select Interrupt mask

d)

None of the above

3.

What is RIM

a)

Reset Interrupt mask

b)

Read Interrupt Mask

c)

Real Interrupt mask

d)

Reverse Interrupt mask

4.

Microprocessor is a

(a)  

5.

Microprocessor 8085 is ______________ bit processor

a)

16

b)

8

c)

32

d)

none of the above

6.

INTR

a)

Interrupt Read

b)

Interrupt Reverse

c)

Interrupt Reset

d)

Interrupt Request

7.

INTA

a)

Interrupt access

b)

Interrupt Acknowledge

c)

Interrupt avoid

d)

none of these

8.

Address Bus

a)

A0 - A15

b)

A1 - A16

c)

A15

d)

All the above

9.

Data Bus

a)

unidirectional

b)

bidirectional

c)

no communication

d)

None of the above

10.

Address Bus

a)

bidirectional

b)

unidirectional

c)

No communication

d)

None of the above

11.

Data Bus

a)

D1 - D8

b)

D8

c)

D0 - D7

d)

All the above

12.

SOD Stands for

(a)  

13.

SID Stands for

(a)  

14.

TRAP is a

a)

maskable interrupt

b)

non maskable interrupt

c)

vectored interrupt

d)

All the above

15.

AD0-AD7 Called as

a)

Address lines

b)

Data lines

c)

Multiplexed lines

d)

All the above

16.

ALE stands for

(a)  

17.

RST 7.5 RST 6.5 RST 5.5 are

a)

non maskable interrupt

b)

maskable interrupt

c)

vectored interrupt

d)

All the above

18.

HLDA stands for

(a)  

19.

S1 & S0 are the

(a)  

20.

The microprocessor communicates and operates in the binary number

a)

0 & 1

b)

1

c)

0

21.

The binary instructions are given abbreviated names

(a)  

22.

The microprocessor reads binary instruction from a storage device called

(a)  

23.

B,C,D,E,H & L

(a)  

24.

The control unit provide the necessary

(a)  

25.

ROM stands for

(a)  

26.

RAM stands for

(a)  

27.

The system bus is a

(a)  

28.

ALU stands for

(a)  

29.

PC stands for

(a)  

30.

SP stands for

(a)  

31.

Which is the microprocessor comprises

a)

a. Register section

b)

b. One or more ALU

c)

c. Control unit

d)

d. All of these

32.

What is store by register?

a)

data

b)

operands

c)

memory

d)

None of these

33.

BCD stands for

a)

Binary coded decimal

b)

Binary coded decoded

c)

Both a & b

d)

none of these

34.

Which is not the control bus signal

a)

READ

b)

WRITE

c)

RESET

d)

None of these

35.

PROM stands for

a)

Programmable read‐only memory

b)

Programmable read write memory

c)

Programmer read and write memory

d)

None of these

36.

Each memory location has

a)

Address

b)

Contents

c)

Both A and B

d)

None of these

37.

A microprocessor retries instructions from

a)

Control memory

b)

Cache memory

c)

Main memory

d)

Virtual memory

38.

NMI stand for

a)

Non mask able interrupt

b)

Non mistake interrupt

c)

Both

d)

None of these

39.

MI stands for

a)

mistake interrupt

b)

maskable interrupt

c)

both

d)

none of the above

40.

________ is usually the first level of memory access by the microprocessor

a)

Cache memory

b)

Data memory

c)

Main memory

d)

All of these

41.

Which is the small amount of high‐ speed memory used to work directly with the microprocessor:

a)

Cache

b)

Case

c)

Cost

d)

none of the above

42.

Which causes the microprocessor to immediately terminate its present activity

a)

RESET signal

b)

Interrupt signal

c)

Both

d)

None of these

43.

The language that the computer can understand and execute is called

a)

Machine language

b)

Application software

c)

System program

d)

All of the above

44.

Which company is the biggest player in the microprocessor industry?

a)

Motorola

b)

IBM

c)

Intel

d)

AMD

45.

The word length of a computer is measured in

a)

Bytes

b)

Millimeters

c)

Meters

d)

Bits

46.

Which part of the computer is used for calculating and comparing?

a)

Disk unit

b)

Control unit

c)

ALU

d)

Modem

47.

An error in computer data is called

a)

Chip

b)

Bug

c)

CPU

d)

Storage device

48.

A/n …. Device is any device that provides information, which is sent to the CPU

a)

Input

b)

Output

c)

CPU

d)

Memory

49.

Which is the brain of computer

a)

ALU

b)

CPU

c)

MU

d)

None of these

50.

The carry is operand by:

a)

C

b)

D

c)

S

d)

O

51.

The sign is operand by

a)

S

b)

D

c)

C

d)

O

52.

The zero is operand by

a)

S

b)

O

c)

Z

d)

C

53.

When memory read or I/O read are active data is to the processor

a)

INPUT

b)

OUTPUT

c)

PROCESSOR

d)

NONE OF THE ABOVE

54.

When memory write or I/O read are active data is from the processor:

a)

INPUT

b)

OUTPUT

c)

PROCESSOR

d)

ALL THE ABOVE

55.

DMA stands for

a)

Direct memory access

b)

Direct memory allocation

c)

Data memory access

d)

Data memory allocation

56.

Which interrupt has the highest priority

a)

INTR

b)

RST6.5

c)

TRAP

d)

none of these

57.

In 8085 name the 16 bit registers

a)

PROGRAM COUNTER

b)

STACK POINTER

c)

A & B

d)

NONE OF THESE

58.

The data in the stack is called

a)

Pushing data

b)

Pushed

c)

Pulling

d)

None of these

59.

The external system bus architecture is created using from ______ architecture

a)

Pascal

b)

Dennis Ritchie

c)

Charles Babbage

d)

Von Neumann

60.

BIU STAND FOR

a)

Bus interface unit

b)

Bess interface unit

c)

.A and B

d)

NONE OF THESE

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