Microprocessor Fundamentals

Q1: I/O mapped systems identify their input/output devices by giving them a(n) ________.

A
8-bit port number

B
16-bit port number

C
8-bit buffer number

D
8-bit instruction

Q2: Because microprocessor CPUs do not understand mnemonics as they are, they have to be converted to ________.

A
hexadecimal machine code

B
binary machine code

C
assembly language

D
all of the above

Q3: When referring to instruction words, a mnemonic is:

A
a short abbreviation for the operand address

B
a short abbreviation for the operation to be performed

C
a short abbreviation for the data word stored at the operand address

D
shorthand for machine language

Q4: How many bits are used in the data bus?

A
7

B
8

C
9

D
16

Q5: The register in the 8085A that is used to keep track of the memory address of the next op-code to be run in the program is the:

A
stack pointer

B
program counter

C
instruction pointer

D
accumulator

Q6: A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the:

A
stack pointer

B
program counter

C
instruction pointer

D
accumulator

Q7: The items that you can physically touch in a computer system are called:

A
software

B
firmware

C
hardware

D
none of the above

Q8: What kind of computer program is used to convert mnemonic code to machine code?

A
debug

B
assembler

C
C++

D
Fortran

Q9: Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the:

A
flags

B
registers

C
monitors

D
decisions

Q10: What type of circuit is used at the interface point of an output port?

A
decoder

B
latch

C
tristate buffer

D
none of the above

Q11: All computer programs for a machine are called:

A
software

B
firmware

C
hardware

D
none of the above

Q12: What is the difference between a mnemonic code and machine code?

A
There is no difference.

B
Machine codes are in binary, mnemonic codes are in shorthand English.

C
Machine codes are in shorthand English, mnemonic codes are in binary.

Q13: What type of circuit is used at the interface point of an input port?

A
decoder

B
latch

C
tristate buffer

D
none of the above

Q14: When was the first 8-bit microprocessor introduced?

A
1969

B
1974

C
1979

D
1985

Q15: The control bus and memories share a bidirectional bus in a typical microprocessor system.

A
True

B
False

Q16: How many buses are connected as part of the 8085A microprocessor?

A
2

B
3

C
5

D
8

Q17: The circuits in the 8085A that provide the arithmetic and logic functions are called the:

A
CPU

B
ALU

C
I/O

D
none of the above

Q18: Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?

A
data bus

B
control bus

C
address bus

D
address decoder bus

Q19: Which of the following are the three basic sections of a microprocessor unit?

A
operand, register, and arithmetic/logic unit (ALU)

B
control and timing, register, and arithmetic/logic unit (ALU)

C
control and timing, register, and memory

D
arithmetic/logic unit (ALU), memory, and input/output

Q20: Which bus is a bidirectional bus?

A
address bus

B
data bus

C
address bus and data bus

D
none of the above

Q21: The technique of assigning a memory address to each I/O device in the computer system is called:

A
memory-mapped I/O

B
ported I/O

C
dedicated I/O

D
wired I/O

Q22: The software used to drive microprocessor-based systems is called:

A
assembly language

B
firmware

C
machine language code

D
BASIC interpreter instructions

Q23: The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.

A
control bus

B
control instructions

C
address decoder

D
CPU

Q24: The 8085A is a(n):

A
16-bit parallel CPU

B
8-bit serial CPU

C
8-bit parallel CPU

D
none of the above

Q25: The devices that provide the means for a computer to communicate with the user or other computers are referred to as:

A
CPU

B
ALU

C
I/O

D
none of the above


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