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- Question
The main advantage of semiconductor RAM is its ability to:
Options- A. retain stored data when power is interrupted or turned off
- B. be written to and read from rapidly
- C. be randomly accessed
- D. be sequentially accessed
- Correct Answer
- be written to and read from rapidly
- 1. Which of the following RAM timing parameters determine its operating speed?
Options- A. tACC
- B. tAA and tACS
- C. tCO and tOD
- D. tRC and tWC Discuss
- 2. Describe the timing diagram of a write operation.
Options- A. First the data is set on the data bus and the address is set, then the write pulse stores the data.
- B. First the address is set, then the data is set on the data bus, and finally the read pulse stores the data.
- C. First the write pulse stores the data, then the address is set, and finally the data is set on the data bus.
- D. First the data is set on the data bus, then the write pulse stores the data, and finally the address is set. Discuss
- 3. Microprocessors and memory ICs are generally designed to drive only a single TTL load. Therefore, if several inputs are being driven from the same bus, any memory IC must be ________.
Options- A. buffered
- B. decoded
- C. addressed
- D. stored Discuss
- 4. ROMs retain data when the ________.
Options- A. power is off
- B. power is on
- C. system is down
- D. all of the above Discuss
- 5. The refresh period for capacitors used in DRAMs is ________.
Options- A. 2 ms
- B. 2 µs
- C. 64 ms
- D. 64 µs Discuss
- 6. In general, the ________ have the smallest bit size and the ________ have the largest.
Options- A. EEPROMs, Flash
- B. SRAM, mask ROM
- C. mask ROM, SRAM
- D. DRAM, PROM Discuss
- 7. The ideal memory ________.
Options- A. has high storage capacity
- B. is nonvolatile
- C. has in-system read and write capacity
- D. has all of the above characteristics Discuss
- 8. What is the significance of the inverted triangles on the outputs of the device in the given figure?
Options- A. They represent inverters and mean that the outputs are active-LOW.
- B. They represent buffers and mean that the outputs can drive 40 TTL loads, instead of the normal 10.
- C. It means that the outputs will be active only if a change has occurred at that memory location since the last read/write cycle.
- D. The outputs are tristated. Discuss
- 9. Which of the following describes the action of storing a bit of data in a mask ROM?
Options- A. A 1 is stored in a bipolar cell by opening the base connection to the address line.
- B. A 0 is stored in a bipolar cell by shorting the base connection to the address line.
- C. A 1 is stored by connecting the gate of a MOS cell to the address line.
- D. A 0 is stored by connecting the gate of a MOS cell to the address line. Discuss
- 10. What is the difference between static RAM and dynamic RAM?
Options- A. Static RAM must be refreshed, dynamic RAM does not.
- B. There is no difference.
- C. Dynamic RAM must be refreshed, static RAM does not. Discuss
Memory and Storage problems
Search Results
Correct Answer: tRC and tWC
Correct Answer: First the data is set on the data bus and the address is set, then the write pulse stores the data.
Correct Answer: buffered
Correct Answer: all of the above
Correct Answer: 2 ms
Correct Answer: EEPROMs, Flash
Correct Answer: has all of the above characteristics
Correct Answer: The outputs are tristated.
Correct Answer: A 1 is stored by connecting the gate of a MOS cell to the address line.
Correct Answer: Dynamic RAM must be refreshed, static RAM does not.
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