Microprocessor Fundamentals
D
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
A
All computer programs for a machine are called: A. software B. firmware C. hardware D. none of the above
B
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
B
How many bits are used in the data bus? A. 7 B. 8 C. 9 D. 16
B
How many buses are connected as part of the 8085A microprocessor? A. 2 B. 3 C. 5 D. 8
A
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
A
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
C
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
C
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
B
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
B
The control bus and memories share a bidirectional bus in a typical microprocessor system. A. True B. False
C
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
C
The items that you can physically touch in a computer system are called: A. software B. firmware C. hardware D. none of the above
B
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
A
The software used to drive microprocessor-based systems is called: A. assembly language B. firmware C. machine language code D. BASIC interpreter instructions
A
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
B
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.
B
What kind of computer program is used to convert mnemonic code to machine code? A. debug B. assembler C. C++ D. Fortran
C
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
B
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
B
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
B
When was the first 8-bit microprocessor introduced? A. 1969 B. 1974 C. 1979 D. 1985
B
Which bus is a bidirectional bus? A. address bus B. data bus C. address bus and data bus D. none of the above
B
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
B
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
