Digital Electronics-Memory and Storage
Digital Electronics-Memory and Storage
1. How many address bits are needed to select all memory locations in the 2118 16K × 1 RAM?
- 8
- 10
- 14
- 16
2. The check sum method of testing a ROM:
- indicates if the data in more than one memory location is incorrect.
- provides a means for locating and correcting data errors in specific memory locations.
- allows data errors to be pinpointed to a specific memory location.
- simply indicates that the contents of the ROM are incorrect.
3. What is the meaning of RAM, and what is its primary role?
- Readily Available Memory; it is the first level of memory used by the computer in all of its operations.
- Random Access Memory; it is memory that can be reached by any sub- system within a computer, and at any time.
- Random Access Memory; it is the memory used for short-term temporary data storage within the computer.
- Resettable Automatic Memory; it is memory that can be used and then automatically reset, or cleared, after being read from or written to.
4. The storage element for a static RAM is the ________.
- diode
- resistor
- capacitor
- flip-flop
5. In a DRAM, what is the state of R/W during a read operation?
- Low
- High
- Hi-Z
- None of the above
6. The condition occurring when two or more devices try to write data to a bus simultaneously is called ________.
- address decoding
- bus contention
- bus collisions
- address multiplexing
7. Which is/are the basic refresh mode(s) for dynamic RAM?
- Burst refresh
- Distributed refresh
- Open refresh
- Burst refresh and distributed refresh
8. One of the most important specifications on magnetic media is the ________.
- rotation speed
- tracks per inch
- data transfer rate
- polarity reversal rate
10. The reason the data outputs of most ROM ICs are tristate outputs is to:
- allow for three separate data input lines.
- allow the bidirectional flow of data between the bus lines and the ROM registers.
- permit the connection of many ROM chips to a common data bus.
- isolate the registers from the data bus during read operations.