Microprocessor Basics set 1

Que: 1. 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
Que: 2. The software used to drive microprocessor-based systems is called:
a. assembly language
b. firmware
c. machine language code
d. BASIC interpreter instructions
Que: 3. 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
Que: 4. 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
Que: 5. How many bits are used in the data bus?
a. 7
b. 8
c. 9
d. 16
Que: 6. 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
Que: 7. 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
Que: 8. 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
Que: 9. 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
Que: 10. 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