Practice Microprocessors And Microcontrollers Multiple Choice Questions with Answers Quiz-2

Q.1.

Which determines the number of operations per second?

Bandwidth
Word Length
Clock Speed
Operations Speed

Q.2.

The __________ controls the flow of data and instructions within the computer.

control unit
register array
accumulator
ALU

Q.3.

What is true about microprocessor?

Microprocessor is a controlling unit of a micro-computer
It is fabricated on a small chip capable of performing ALU (Arithmetic Logical Unit) operations
It also communicate with the other devices connected to it.
All of the above

Q.4.

Why microcontrollers are not called general purpose computers?

because they have built in RAM and ROM
because they design to perform dedicated task
because they are cheap
because they consume low power

Q.5.

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

speed
availability
ease with the product
all of the mentioned

Q.6.

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

.doc
.c
.txt
.hex

Q.7.

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

data bus, address bus
data bus
data bus, address bus, control bus
address bus

Q.8.

Abbreviate CISC and RISC.

Complete Instruction Set Computer, Reduced Instruction Set Computer
Complex Instruction Set Computer, Reduced Instruction Set Computer
Complex Instruction Set Computer, Reliable Instruction Set Computer
Complete Instruction Set Computer, Reliable Instruction Set Computer

Q.9.

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

it increases and turns better
it decreases
remains the same
internal bus width doesn’t affect the performance in any way

Q.10.

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

Data Bus
ALU
Control Bus
Address Bus

Q.11.

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

decode,fetch,execute
execute,fetch,decode
fetch,execute,decode
fetch,decode,execute

Q.12.

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

high power dissipation
low power consumption
low voltage consumption
low current consumption

Q.13.

A microcontroller at-least should consist of:

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

Q.14.

What is the status of stack pointer for the execution of PUSH and POP operations ?

It gets post-decremented for PUSH & pre-incremented for POP
It gets pre-incremented for PUSH as well as POP
It gets pre-incremented for PUSH & post-decremented for POP
It gets post-decremented for PUSH as well as POP

Q.15.

Priority interrupts of 8085a. TRAP b.RST 5. c.RST 7.d.RST 6.5 e.INTR

a,c,d,b,e
a,b,c,d,e
b,a,c,d,e
c,d,e,a,b

Q.16.

How many address lines in a 4096*8 EPROM CHIP?

12
11
15
16

Q.17.

What does the instruction XCHD A, @Ri signify during the data transfer in the program execution ?

Exchange of register with an accumulator
Exchange of direct byte with an accumulator
Exchange of low order digit indirect RAM with an accumulator
Exchange of indirect RAM with an accumulator

Q.18.

Which one is NOT a Logical and Bit Manipulation instruction?

ANA B
ORA B
XRA B
DCR B

Q.19.

Instruction set hasopcodes(eg.MOV,MVI) and ____number of instructions

200
246
250
300

Q.20.

MOV B, A is a ________ addressing mode.

register
register indirect
Immediate
Direct

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