Semiconductor Memory Questions and Answers

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Showing 10 of 31 questions
Q21
What is the typical access time range for semiconductor memories?
  • A Nanoseconds
  • B Microseconds
  • C Milliseconds
  • D Seconds
Answer: Option A
Explanation: Semiconductor memories typically have access times in nanoseconds.
Q22
Which factor determines the data retention capability in DRAM?
  • A Refresh cycle
  • B Power supply voltage
  • C Temperature
  • D Access time
Answer: Option A
Explanation: DRAM uses capacitors that leak charge over time, requiring refresh cycles.
Q23
What is the main difference between SRAM and DRAM?
  • A SRAM uses flip-flops, DRAM uses capacitors
  • B SRAM is slower than DRAM
  • C SRAM requires refresh cycles
  • D DRAM has higher density than SRAM
Answer: Option A
Explanation: SRAM uses flip-flops while DRAM uses capacitors for data storage.
Q24
Which memory type is commonly used in USB drives?
  • A Flash Memory
  • B DRAM
  • C SRAM
  • D ROM
Answer: Option A
Explanation: Flash memory is non-volatile and commonly used in USB drives and SSDs.
Q25
What does the term "random access" mean in RAM?
  • A Any location can be accessed directly
  • B Sequential access only
  • C Random data generation
  • D Unpredictable access patterns
Answer: Option A
Explanation: Random access means any memory location can be accessed in approximately equal time.
Q26
Which memory type has the fastest access time?
  • A SRAM
  • B DRAM
  • C ROM
  • D Flash Memory
Answer: Option A
Explanation: SRAM has faster access time than DRAM due to its flip-flop based design.
Q27
What is the purpose of refresh cycles in DRAM?
  • A Maintain data in capacitors
  • B Increase access speed
  • C Reduce power consumption
  • D Clear memory contents
Answer: Option A
Explanation: Refresh cycles recharge the capacitors in DRAM to maintain data integrity.
Q28
Which memory type is volatile and requires constant power?
  • A RAM
  • B ROM
  • C PROM
  • D EPROM
Answer: Option A
Explanation: RAM is volatile memory that loses data when power is removed.
Q29
What is the storage capacity unit typically used for semiconductor memories?
  • A Bits
  • B Volts
  • C Ohms
  • D Hertz
Answer: Option A
Explanation: Bits are the fundamental unit, with capacities measured in bytes and multiples.
Q30
Which memory type can be erased using UV light?
  • A EPROM
  • B EEPROM
  • C Flash Memory
  • D PROM
Answer: Option A
Explanation: EPROM can be erased by exposure to ultraviolet light through a quartz window.

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