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 |
(b). a short abbreviation for the operation to be performed
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) ________.
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| a. 8-bit port number |
| b. 16-bit port number |
| c. 8-bit buffer number |
| d. 8-bit instruction |