Memory and Storage problems
- 1. Which type of ROM can be erased by UV light?
Options- A. ROM
- B. mask ROM
- C. EPROM
- D. EEPROM Discuss
Correct Answer: EPROM
- 2. When a RAM module passes the checkerboard test it is:
Options- A. able to read and write only 1s.
- B. faulty.
- C. probably good.
- D. able to read and write only 0s. Discuss
Correct Answer: probably good.
- 3. The refresh period for capacitors used in DRAMs is ________.
Options- A. 2 ms
- B. 2 µs
- C. 64 ms
- D. 64 µs Discuss
Correct Answer: 2 ms
- 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
Correct Answer: all of the above
- 5. 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
Correct Answer: buffered
- 6. 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
Correct Answer: First the data is set on the data bus and the address is set, then the write pulse stores the data.
- 7. 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
Correct Answer: tRC and tWC
- 8. 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 Discuss
Correct Answer: be written to and read from rapidly
- 9. 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
Correct Answer: EEPROMs, Flash
- 10. 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
Correct Answer: has all of the above characteristics
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