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MICROCONTROLLER CAT-III_2025_EVEN

Total questions: 60

Worksheet time: 45mins

Name
Class
Date
1.

IC 8051 is a

a)

Microprocessor

b)

microcontroller

c)

computer

2.

Stack pointer 0f 8051 is a

a)

8 bit reg

b)

12 bit reg

c)

16 bit reg

d)

32 bit reg

3.

The maximum available external program memory address space for 8051 is

a)

32kbytes

b)

128 kbytes

c)

64 kbytes

d)

16 kbytes

4.

Data pointer of 8051 is a

a)

4 bit reg

b)

8 bit reg

c)

32 bit reg

d)

16 bit reg

5.

The total number of bit and byte addressable reg of 8051 are

a)

11

b)

10

c)

12

d)

none of the above

6.

The total pin number of 8051 is

a)

20

b)

16

c)

40

d)

18

7.

The multifunction port of 8051 is

a)

port 0

b)

port 1

c)

port 2

d)

port 3

8.

This register is not used in programming

a)

PSW

b)

A

c)

DPTR

d)

TMP 1

9.

The total capacity of internal RAM is

a)

128 bytes

b)

256 bytes

c)

64k bytes

d)

4 kbytes

10.

The register which hold the address of next instruction to be executed is

a)

PC

b)

SP

c)

PSW

d)

DPTR

11.

The total number of register banks placed in 8051 is

a)

8

b)

16

c)

12

d)

4

12.

The register bank of 8051 is selected by using the bits of

a)

CY and AC

b)

RS1 and RS0

c)

OV and P

d)

RS1 and FO

13.

Stack is a

a)

ROM

b)

EPROM

c)

SRAM

d)

RAM

14.

After reset the content of SP is

a)

07 H

b)

OSH

c)

09H

d)

OAH

15.

How many I/O ports placed in 8051

a)

1

b)

2

c)

3

d)

4

16.

The maximum capacity of internal program memory is

a)

4kbytes

b)

2kbytes

c)

12kbytes

d)

1kbytes

17.

The only register which does not contains byte and bit address is

a)

SP

b)

PC

c)

PSW

d)

DPTR

18.

The total number of instructions of 8051 is

a)

49

b)

17

c)

111

d)

120

19.

The instruction of 8051 are classified into

a)

3 groups

b)

5 groups

c)

4 groups

d)

6 groups

20.

Which instruction is used to move the data from indirect RAM to accumulator

a)

MOV A, @Ri

b)

MOV direct,Rn

c)

MOV @Ri, A

21.

Which instruction is used to access external data memory

a)

MOV

b)

PUSH

c)

MOVX

d)

MOVC

22.

DAA can be adjust the value placed in Acc to decimal after…….. operation

a)

Addition

b)

Subtraction

c)

Multiplication

d)

Division

23.

The operation of XRL, @Ri is

a)

(A)←A˅Ri

b)

(A) ←(A) ˅(Ri)

c)

(A)←(A)˄(Ri)

d)

none of the above

24.

The range of SJMP instruction is

a)

128 bytes

b)

64 bytes

c)

2kbytes

d)

256 bytes

25.

The range of ACALL instruction is

a)

2kbytes

b)

32kbytes

c)

256bytes

d)

64 kbytes

26.

These instruction are conditional jump instructions.

a)

JZ and CJNE

b)

CJNE and DJNZ

c)

DJNZ and JC

d)

none of the above

27.

The only operation not possible in bit level is.

a)

data transfer

b)

jump

c)

logical

d)

arithmetic

28.

How many addressing modes are used in 8051?

a)

5

b)

4

c)

6

d)

3

29.

The time delay subroutines is used to

a)

delay the operation

b)

On the load

c)

OFF the load

d)

none of the above

30.

How many types of bit level jump instruction are possible in 8051

a)

4

b)

6

c)

5

d)

7

31.

Which language is used in Arduino.

a)

Basic

b)

C++

c)

java

d)

none of the above

32.

What is Arduino?

a)

Programming language

b)

image editing software

c)

open source electronics platform

33.

How many types of Arduino do we have

a)

4

b)

8

c)

12

d)

16

34.

How many analog pins are used in Arduino mega board?

a)

16

b)

12

c)

8

d)

14

35.

Arduino are registered as……… in the Arduino IDE.

a)

drawings

b)

links

c)

notes

d)

sketches

36.

What is the microcontroller used in Arduino UNO?

a)

AT mega 32114

b)

AT91SAM3*PE

c)

AT mega 2560

d)

AT mega 328p

37.

What is the operating voltage of At mega 328?

a)

1.9v to 5 v

b)

1.1 v to 5 v

c)

9 v to 12 v

d)

1.8 v to 5.5 v

38.

What is IOT?

a)

internet of things

b)

internet of technology

c)

incorporate of things

d)

incorporate of technology

39.

IC 8255 is a

a)

20 pin IC

b)

30 pin IC

c)

40 pin IC

d)

16 pin IC

40.

IC 8255 contains.

a)

only one I/O port

b)

2 I/O ports

c)

5 I/O ports

d)

3 I/O ports

41.

The BSR mode is used to set/clear the individual pins of

a)

port A

b)

port C

c)

port B

d)

none of the above

42.

LM35 is a

a)

Temperature

b)

force sensor

c)

relay

d)

none of the above

43.

The PWM techniques is used to control the speed of

a)

stepper motor

b)

dc motor and stepper motor

c)

Dc motor

d)

none of the above

44.

The group A of 8255 contains.

a)

Port A & port C upper

b)

port A & port B

c)

port A & port C lower

45.

Which port is able to operate in mode 2.

a)

Port A

b)

port B

c)

port A & port B

d)

none of the above

46.

In BSR mode the first bit (D0) is used to

a)

reset the bit

b)

set the bit

c)

set/reset the bit

d)

none of the above

47.

The RS pin of LCD is used to

a)

On the display

b)

OFF the display

c)

enable the display

d)

select the register.

48.

The byte addresses of port 0 and port 1 are

a)

80H and 90H

b)

80H and AOH

c)

90H and AOH

d)

AOH and BOH

49.

Microcontroller 8051 contains

a)

Only one timer/counter

b)

3 timer/counter

c)

2 timer/counters

d)

4 timer/counters

50.

The frequency of 8051 is

a)

fosc

b)

fosc/24

c)

fosc/2

d)

fosc/12

51.

The maximum frequency of 8051 counter is

a)

fosc/24

b)

fosc/2

c)

fosc12

d)

fosc

52.

TMOD is a

a)

Only bit addressable register

b)

bit & byte addressable

c)

only byte addressable

53.

The mode 1 of timer counter is called as.

a)

13 bit timer counter

b)

16 bit timer counter

c)

8 bit timer counter

54.

If M1=1 and M0=0, the operating mode is called as

a)

13 bit timer

b)

16 bit timer

c)

8 bit auto reload timer

d)

split timer

55.

The serial communication of 8051 contains.

a)

2 modes

b)

3 modes

c)

5 modes

d)

4 modes

56.

The baud rate of shift register is.

a)

fosc/12

b)

fosc

c)

fosc/24

d)

fosc/36

57.

The SMOD bit of PCON is used to set

a)

the mode of operation

b)

double baud rate

c)

enable transmission

d)

enable reception

58.

What is the primary function of a microcontroller?

a)

Data processing

b)

Data visualization

c)

Data storage

d)

Data transmission

59.

Which of the following is a common communication protocol used in IoT?

a)

SMTP

b)

HTTP

c)

FTP

d)

MQTT

60.

What is the purpose of a sensor in an IoT system?

a)

To process data

b)

To collect data

c)

To store data

d)

To display data

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