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mca introduction

Total questions: 120

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

1st microprocessor was introduced in the year

a)

1907

b)

1945

c)

1971

d)

1973

2.

An 8 bit microprocessor has ---data bus

a)

16

b)

8

c)

19

d)

10

3.

Microprocessor consists of

a)

ALU

b)

Address bus

c)

Data bus

d)

All

4.

Which determines the number of operations per second?

a)

Bandwidth

b)

Word Length

c)

Clock Speed

d)

Operations Speed

5.

The number of bits processed in a single instruction is known as ?

a)

Instruction Set

b)

Bandwidth

c)

Bandspeed

d)

Instruction Speed

6.

FIrst microprocessor build by the Intel Corporation was called_____

a)

8008

b)

8080

c)

4004

d)

8800

7.

Program Counter in 8051 is

a)

8 bit wide

b)

16 bit wide

c)

20 bit wide

8.

Name the following image

a)

Program Status Work (PSW)

b)

Program Status Word (PSW)

c)

Program Serial Word (PSW)

d)

Peripheral Status Word (PSW)

9.

 EA‾\overline{EA}  is held _____ , to access external ROM

a)

High

b)

Low

c)

High Impedance State

d)

None

10.

which port is used only for INPUT/OUTPUT operation?

a)

PORT 0

b)

PORT 1

c)

PORT 2

d)

PORT 3

11.

8051 microcontrollers are manufactured by which of the following companies?

a)

Atmel

b)

Philips

c)

Intel

d)

All of the mentioned

12.

Give the internal RAM size in 8051.

a)

8-bit

b)

1-Byte

c)

4 KB

d)

128 Byte

13.

PIN number of Vcc (supply)?

a)

1

b)

20

c)

40

d)

10

14.

ROM memory size placed on chip?

a)

64Kbytes

b)

4Kbytes

c)

256 Bytes

d)

128 bytes

15.

How many timers are present in 8051

a)

2

b)

4

c)

1

16.

Is Port 0 is Special Function Register?

a)

TRUE

b)

FALSE

17.

8051 microcontroller has ONE or TWO bit handling instrucions?

a)

FALSE

b)

TRUE

18.

What is an bit handling capacity of 8051?

a)

4 Bit

b)

8 Bit

c)

16 Bit

d)

32 Bit

19.

What is an arithmetic of 'B' register?

a)

Addition & Subtraction

b)

Addition & Multiplication

c)

Multiplication & Subtraction

d)

Multiplication & Division

20.

What is an another name of DPTR?

a)

Stack pointer

b)

Data pointer

c)

Memory pointer

d)

Program pointer

21.

Mention the timers name in 8051 microcontroller

(a)  

22.

How many bidirectional I/O liner are in 8051 microcontroller?

(a)  

23.

Is the address bus an eight bit bus?

a)

True

b)

False

24.

What is an another name of RAM?

a)

Program memory

b)

Data memory

c)

Coded memory

d)

Combination memory

25.

It is the brain of a microcontroller.

a)

RAM

b)

CPU

c)

ROM

d)

EEPROM

26.

1. A microcontroller at-least should consist of:

a)

RAM, ROM, I/O ports and timers

b)

CPU, RAM, I/O ports and timers

c)

CPU, RAM, ROM, I/O ports and timers

d)

CPU, ROM, I/O ports and timers

27.

2. Unlike microprocessors, microcontrollers make use of batteries because they have:

a)

high power dissipation

b)

low power consumption

c)

low voltage consumption

d)

low current consumption

28.

3. What is the order decided by a processor or the CPU of a controller to execute an instruction?

a)

decode,fetch,execute

b)

execute,fetch,decode

c)

fetch,execute,decode

d)

fetch,decode,execute

29.

4. If we say microcontroller is 8-bit then here 8-bit denotes size of:

a)

Data Bus

b)

ALU

c)

Control Bus

d)

Address Bus

30.

5. How are the performance and the computer capability affected by increasing its internal bus width?

a)

it increases and turns better

b)

it decreases

c)

remains the same

d)

internal bus width doesn’t affect the performance in any way

31.

6. Abbreviate CISC and RISC.

a)

Complete Instruction Set Computer, Reduced Instruction Set Computer

b)

Complex Instruction Set Computer, Reduced Instruction Set Computer

c)

Complex Instruction Set Computer, Reliable Instruction Set Computer

d)

Complete Instruction Set Computer, Reliable Instruction Set Computer

32.

7. Give the names of the buses present in a controller for transferring data from one place to another?

a)

data bus, address bus

b)

data bus

c)

data bus, address bus, control bus

d)

address bus

33.

8. What is the file extension that is loaded in a microcontroller for executing any instruction?

a)

.doc

b)

.c

c)

.txt

d)

.hex

34.

9. What is the most appropriate criterion for choosing the right microcontroller of our choice?

a)

speed

b)

availability

c)

ease with the product

d)

all of the mentioned

35.

10. Why microcontrollers are not called general purpose computers?

a)

because they have built in RAM and ROM

b)

because they design to perform dedicated task

c)

because they are cheap

d)

because they consume low power

36.

8051 microcontrollers are manufactured by which of the following companies?

a)

Atmel

b)

Philips

c)

Intel

d)

All of the mentioned

37.

8051 series has how many 16 bit registers

a)

2

b)

3

c)

1

d)

0

38.

When 8051 wakes up then 0x00 is loaded to which register?

a)

PSW

b)

SP

c)

PC

d)

None of the mentioned

39.

When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected?

a)

PSW

b)

SP

c)

DPTR

d)

PC

40.

If we push data onto the stack then the stack pointer

a)

increases with every push

b)

decreases with every push

c)

increases & decreases with every push

d)

none of the mentioned

41.

On power up, the 8051 uses which RAM locations for register R0- R7

a)

00-2F

b)

00-07

c)

00-7F

d)

00-0F

42.

How many bytes of bit addressable memory is present in 8051 based microcontrollers?

a)

8 bytes

b)

32 bytes

c)

16 bytes

d)

128 bytes

43.

When we add two numbers the destination address must always be.

a)

some immediate data

b)

any register

c)

accumulator

d)

memory

44.

DAA command adds 6 to the nibble if:

a)

CY and AC are necessarily 1

b)

either CY or AC is 1

c)

no relation with CY or AC

d)

CY is 1

45.

A microcontroller at-least should consist of:

a)

RAM, ROM, I/O ports and timers

b)

CPU, RAM, I/O ports and timers

c)

CPU, RAM, ROM, I/O ports and timers

d)

CPU, ROM, I/O ports and timers

46.

What are the two instruction set architecture (ISA) classifications

a)

SIDC & BIDC

b)

CISC & RISC

c)

CISC & VISC

d)

RISC & MISC

47.

A microcontroller at-least should consist of:

a)

RAM, ROM, I/O ports and timers

b)

CPU, RAM, I/O ports and timers

c)

CPU, RAM, ROM, I/O ports and timers

d)

CPU, ROM, I/O ports and timers

48.

What is the order decided by a processor or the CPU of a controller to execute an instruction?

a)

decode, fetch, execute

b)

execute, fetch, decode

c)

fetch, execute, decode

d)

fetch, decode, execute

49.

 If we say microcontroller is 8-bit then here 8-bit denotes size of:

a)

Data Bus

b)

ALU

c)

Control Bus

d)

Address Bus

50.

Abbreviate CISC and RISC.

a)

Complete Instruction Set Computer, Reliable Instruction Set Computer

b)

Complex Instruction Set Computer, Reduced Instruction Set Computer

c)

Complex Instruction Set Computer, Reliable Instruction Set Computer

d)

Complete Instruction Set Computer, Reliable Instruction Set Computer

51.

What is the most appropriate criterion for choosing the right microcontroller of our choice?

a)

speed

b)

availability

c)

ease with the product

d)

all of the mentioned

52.

Why microcontrollers are not called general purpose computers?

a)

because they have built in RAM and ROM

b)

because they design to perform dedicated task

c)

because they are cheap

d)

because they consume low power

53.

Which architecture is followed by general purpose microprocessors?

a)

Harvard architecture

b)

Von Neumann architecture

c)

None of the mentioned

d)

All of the mentioned

54.

What is the file extension that is loaded in a microcontroller for executing any instruction?

a)

.doc

b)

.c

c)

.txt

d)

.hex

55.

Register that is used to hold the memory address of the next instruction to be executed is

a)

Program Memory

b)

Program Counter

c)

Control Unit

d)

Instruction decoder

56.

What is the standard form of ARM?

a)

Advanced RISC Machine

b)

Automatic RISC Machine

c)

Automatic RISC Motor

d)

None of the above

57.

 How many registers does ARM have?

a)

Four

b)

Eight

c)

Sixteen

d)

Thirty-seven

58.

When the processor is executing in ARM state, then all instructions are ______________ wide

a)

8-bits

b)

16-bits

c)

32-bits

d)

64-bits

59.

Which one of the following architecture has fewer number instructions?

a)

RISC

b)

CISC

c)

Both a and b

d)

None of the above

60.

When the processor is executing in thumb state, then all instructions are ______________ wide

a)

8-bits

b)

16-bits

c)

32-bits

d)

64-bits

61.

What are the benefits of on-chip RAM?

a)

Simpler

b)

Cheaper

c)

Uses less power

d)

All of the above

62.

What is the standard form of CPSR?

a)

Current Program Register

b)

Current Program Status Register

c)

Complex Program Register

d)

None of the above

63.

What is the standard form of MMU?

a)

Memory Management Unit

b)

Map Management Unit

c)

Management Memory Unit

d)

None of the above

64.

What is the standard form of AMBA?

a)

ARM Microcontroller Bus Architecture

b)

Advanced Microcontroller Bus Architecture

c)

ARM Microprocessor Bus Architecture

d)

None of the above

65.

Which one of the following is a CISC architecture?

a)

ARM7

b)

8051

c)

Both a and b

d)

None of the above

66.

DC MOTOR CONVERTS ------- ENERGY INTO ----------ENERGY

a)

MECHANICAL, ELECTRICAL

b)

ELECTRICAL, MECHANICAL

c)

KINETIC, POTENTIAL

67.

AS PER FLEMING'S LEFT-HAND RULE THUMB FINGER SHOWS THE

a)

DIRECTION OF MAGNETIC FIELD

b)

DIRECTION OF CURRENT

c)

DIRECTION OF FORCE

68.

How does a Stepper Motor move ?

a)

A. Electrical Pulse

b)

B. Continuous Applied Voltage

c)

C. Alternates from A and B

69.

Which of the following is not a component of a stepper motor?

a)

A. Windings

b)

B. Rotor and Stator

c)

C. Commutator

d)

D. Brush

e)

E. Both C and D

70.

THE WORKING PRINCIPLE OF DC MOTOR IS---------

a)

MUTUAL INDUCTION

b)

FLEMING'S RIGHT HAND

c)

LORENTZ LAW

71.

How can we control the speed of a stepper motor?

a)

by controlling its switching rate

b)

by controlling its torque

c)

by controlling its wave drive 4 step sequence

d)

Can't be controlled

72.

How can the direction of the DC motor be changed?

a)

by changing the torque

b)

by changing the switching speed

c)

by changing the polarity of voltages connected to the leads

d)

None of the mentioned

73.

working based on the H-bridge concept

a)

True

b)

False

74.

Interfacing with 8051 microcontroller can be defined as transferring data from interfacing peripherals such as sensors, motors, machines, circuit components, and so on to 8051 microcontroller and vice versa.

a)

True

b)

False

75.

Function of H-Bridge in DC motor control is

a)

Change the speed of the DC motor

b)

Change the direction of the DC motor

c)

Send feedback of the speed of the DC motor

d)

Measures the speed of the DC motor

76.

Speed change of DC motor is controlled by

a)

Enable pin

b)

Input pins

c)

H-bridge

d)

Output pins

77.

How does a Stepper Motor move ?

a)

A. Electrical Pulse

b)

B. Continuous Applied Voltage

c)

C. Alternates from A and B

78.

A pulse can be produce by which means ?

a)

A. Microprocessor

b)

B. Timing Logic

c)

C. Toggle Switch

d)

D. All of the above

79.

Which of the following is not a type of stepper motor?

a)

A. Variable Reluctance

b)

B. Hybrid

c)

C. Magnetic

d)

D. Lead-Screw

80.

Which of the following phase switching sequence represents half-step operation of a VR stepper motor ?

a)

(a) A, B, C, A .......................

b)

(b) A, C, B, A .......................

c)

(c) AB, BC, CA, AB .......................

d)

(d) A, AB, B, BC .......................

81.

A variable reluctance stepper motor is constructed of ______________ material with salient poles.

a)

a) Paramagnetic

b)

b) Diamagnetic

c)

c) Ferromagnetic

d)

d) Non-magnetic

82.

A variable reluctance stepper motor is constructed of ______________ material with salient poles.

a)

a) Paramagnetic

b)

b) Diamagnetic

c)

c) Ferromagnetic

d)

d) Non-magnetic

83.

If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be

a)

a) 2

b)

b) 3

c)

c) 4

d)

d) 6

84.

The rotor of a stepper motor has no

a)

a) Windings

b)

b) Commutator

c)

c) Brushes

d)

d) All of the mentioned

85.

A stepping motor is a ____________ device.

a)

a) Electrical

b)

b) Mechanical

c)

c) Incremental

86.

Mention the 2 configurations of Stepper motor.

4 lines
87.

Addressing Of Internal RAM is --------.

a)

(00-0F)H

b)

(00-1F)H

c)

(00-7F)H

d)

None of the above

88.

The address of General purpose register is -------.

a)

(00-0F)H

b)

(00-1F)H

c)

(00-7F)H

d)

None of the above

89.

How many register banks are there in MC 8051

a)

1

b)

2

c)

3

d)

4

90.

Address of bit addressable area is ----------.

a)

(00-0F)H

b)

(00-1F)H

c)

(20-2F)H

d)

None of the above

91.

How many registers are there in each bank

a)

1

b)

2

c)

8

d)

4

92.

Which pin send back the MC to its initial stage

a)

INTR

b)

RST

c)

ALE

d)

None of the above

93.

Which pin is used to access External memory

a)

PSEN

b)

EA

c)

ALE

d)

RST

94.

ALE pin is used to

a)

Multiplex address & Data lines

b)

Demultiplex address & Data lines

c)

None of the above

95.

Which port in 8051MC have single function

a)

P1

b)

P2

c)

P0

d)

P3

96.

8051MC is a -------- pin IC

a)

32

b)

40

c)

20

d)

None of the above

97.

DAC 0808 is a-----

a)

16 pin IC in DIP package

b)

40 pin IC in DIP package

c)

8 pin IC in DIP package

d)

60 pin IC in DIP package

98.

DAC 0808 has----- inputs

a)

4 binary inputs

b)

8 binary inputs

c)

16 binary inputs

d)

32 binary inputs

99.

Supply voltage for DAC 0808 is---

a)

3 V

b)

12 V

c)

6 V

d)

5 V

100.

If the data is 00H for DAC then what is the output?

Note V Ref is 10V

a)

2 V

b)

1 V

c)

0 V

d)

3 V

101.

If the data is 80H for DAC then what is the output?

Note V Ref is 10V

a)

0 V

b)

2 V

c)

5 V

d)

8 V

102.

f the data is FFH for DAC then what is the output?

Note V Ref is 10V

a)

0 V

b)

10 V

c)

5 V

d)

8 V

103.

IC ADC 0809 has-----

a)

16 pin

b)

8 pin

c)

32 pin

d)

20 pin

104.

Maximum clock input to 8253 is -------

a)

11.6 MHz

b)

10 MHz

c)

2.6 MHz

d)

8 MHz

105.

8253 consists of -------- identical 16-bit counters

a)

6

b)

5

c)

4

d)

3

106.

Timers are--------programmable.

a)

software

b)

Hardware

c)

Both

d)

None

107.

True or false

Timer 8253 is Compatible with all types of microprocessors.

a)

True

b)

False

108.

DBB in 8253 is known sa

a)

Data Bus Buffer

b)

Digital Bus Buffer

c)

Data Bit Buffer

d)

Data Binary Buffer

109.

IF A1 and A0 data is 0 1 then which counter is selected in 8253?

a)

Counter 0

b)

Counter 1

c)

Counter 2

d)

None

110.

Total no of modes in 8253 timer?

a)

3

b)

4

c)

6

d)

5

111.

8051 microcontrollers are manufactured by which of the following companies?

a)

Atmel

b)

Philips

c)

Intel

d)

All of the mentioned

112.

8051 series has how many 16 bit registers

a)

2

b)

3

c)

1

d)

0

113.

When 8051 wakes up then 0x00 is loaded to which register?

a)

PSW

b)

SP

c)

PC

d)

None of the mentioned

114.

When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected?

a)

PSW

b)

SP

c)

DPTR

d)

PC

115.

If we push data onto the stack then the stack pointer

a)

increases with every push

b)

decreases with every push

c)

increases & decreases with every push

d)

none of the mentioned

116.

On power up, the 8051 uses which RAM locations for register R0- R7

a)

00-2F

b)

00-07

c)

00-7F

d)

00-0F

117.

How many bytes of bit addressable memory is present in 8051 based microcontrollers?

a)

8 bytes

b)

32 bytes

c)

16 bytes

d)

128 bytes

118.

When we add two numbers the destination address must always be.

a)

some immediate data

b)

any register

c)

accumulator

d)

memory

119.

DAA command adds 6 to the nibble if:

a)

CY and AC are necessarily 1

b)

either CY or AC is 1

c)

no relation with CY or AC

d)

CY is 1

120.

A microcontroller at-least should consist of:

a)

RAM, ROM, I/O ports and timers

b)

CPU, RAM, I/O ports and timers

c)

CPU, RAM, ROM, I/O ports and timers

d)

CPU, ROM, I/O ports and timers

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