Discussion
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- Question
Which type of ROM can be erased by UV light?
Options- A. ROM
- B. mask ROM
- C. EPROM
- D. EEPROM
- Correct Answer
- EPROM
- 1. Which is not characteristic of a shift register?
Options- A. Serial in/parallel in
- B. Serial in/parallel out
- C. Parallel in/serial out
- D. Parallel in/parallel out Discuss
- 2. Computers operate on data internally in a ________ format.
Options- A. tristate
- B. universal
- C. parallel
- D. serial Discuss
- 3. In a 4-bit Johnson counter sequence there are a total of how many states, or bit patterns?
Options- A. 1
- B. 2
- C. 4
- D. 8 Discuss
- 4. The primary purpose of a three-state buffer is usually:
Options- A. to provide isolation between the input device and the data bus
- B. to provide the sink or source current required by any device connected to its output without loading down the output device
- C. temporary data storage
- D. to control data flow Discuss
- 5. A 74HC195 4-bit parallel access shift register can be used for ________.
Options- A. serial in/serial out operation
- B. serial in/parallel out operation
- C. parallel in/serial out operation
- D. all of the above Discuss
- 6. 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
- 7. The refresh period for capacitors used in DRAMs is ________.
Options- A. 2 ms
- B. 2 µs
- C. 64 ms
- D. 64 µs Discuss
- 8. ROMs retain data when the ________.
Options- A. power is off
- B. power is on
- C. system is down
- D. all of the above Discuss
- 9. 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
- 10. 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
Memory and Storage problems
Search Results
Correct Answer: Serial in/parallel in
Correct Answer: parallel
Correct Answer: 8
Correct Answer: to provide isolation between the input device and the data bus
Correct Answer: all of the above
Correct Answer: probably good.
Correct Answer: 2 ms
Correct Answer: all of the above
Correct Answer: buffered
Correct Answer: First the data is set on the data bus and the address is set, then the write pulse stores the data.
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