Memory and Storage problems
- 1. 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
Correct Answer: The outputs are tristated.
- 2. 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
Correct Answer: A 1 is stored by connecting the gate of a MOS cell to the address line.
- 3. 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
Correct Answer: Dynamic RAM must be refreshed, static RAM does not.
- 4. An 8-bit address code can select ________.
Options- A. 8 locations in memory
- B. 256 locations in memory
- C. 65,536 locations in memory
- D. 131,072 locations in memory Discuss
Correct Answer: 256 locations in memory
- 5. Which type of ROM has to be custom built by the factory?
Options- A. ROM
- B. mask ROM
- C. EPROM
- D. EEPROM Discuss
Correct Answer: mask ROM
- 6. Which of the following is one of the basic characteristics of DRAMs?
Options- A. DRAMs must have a constantly changing input.
- B. DRAMs must be periodically refreshed in order to be able to retain data.
- C. DRAMs have a broader "dynamic" storage range than other types of memories.
- D. DRAMs are simpler devices than other types of memories. Discuss
Correct Answer: DRAMs must be periodically refreshed in order to be able to retain data.
- 7. Why is a refresh cycle necessary for a dynamic RAM?
Options- A. to clear the flip-flops
- B. to set the flip-flops
- C. The refresh cycle discharges the capacitor cells.
- D. The refresh cycle keeps the charge on the capacitor cells. Discuss
Correct Answer: The refresh cycle keeps the charge on the capacitor cells.
- 8. Which of the following is NOT a type of memory?
Options- A. RAM
- B. ROM
- C. FPROM
- D. EEPROM Discuss
Correct Answer: FPROM
- 9. Which is/are the basic refresh mode(s) for dynamic RAM?
Options- A. Burst refresh
- B. Distributed refresh
- C. Open refresh
- D. Burst refresh and distributed refresh Discuss
Correct Answer: Burst refresh and distributed refresh
- 10. What is the computer main memory?
Options- A. Hard drive and RAM
- B. CD-ROM and hard drive
- C. RAM and ROM
- D. CMOS and hard drive Discuss
Correct Answer: RAM and ROM
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