Power Semiconductor Devices And Their Applications(Engineering > Electronics And Communication Engineering ) Questions and Answers

Question 1.  A computerized self-diagnostic for a ROM test uses:
  1.    the check-sum method
  2.    a ROM listing
  3.    ROM comparisons
  4.    a checkerboard test
Explanation:-
Answer: Option A. -> the check-sum method
Question 2.  How many storage locations are available when a memory device has twelve address lines?
  1.    144
  2.    512
  3.    2048
  4.    4096
Explanation:-
Answer: Option D. -> 4096
Question 3.  Select the best description of read-only memory (ROM).
  1.    nonvolatile, used to store information that changes during system operation
  2.    nonvolatile, used to store information that does not change during system operation
  3.    volatile, used to store information that changes during system operation
  4.    volatile, used to store information that does not change during system operation
Explanation:-
Answer: Option B. -> nonvolatile, used to store information that does not change during system operation
Question 4.  The access time (tacc) of a memory IC is governed by the IC's:
  1.    internal address buffer
  2.    internal address decoder
  3.    volatility
  4.    internal address decoder and volatility
Explanation:-
Answer: Option B. -> internal address decoder
Question 5.  Advantage(s) of an EEPROM over an EPROM is (are):
  1.    the EPROM can be erased with ultraviolet light in much less time than an EEPROM
  2.    the EEPROM can be erased and reprogrammed without removal from the circuit
  3.    the EEPROM has the ability to erase and reprogram individual words
  4.    the EEPROM can erase and reprogram individual words without removal from the circuit
Explanation:-
Answer: Option D. -> the EEPROM can erase and reprogram individual words without removal from the circuit
Question 6.  Which of the following memories uses a MOSFET and a capacitor as its memory cell?
  1.    SRAM
  2.    DRAM
  3.    ROM
  4.    DROM
Explanation:-
Answer: Option B. -> DRAM
Question 7.  Which of the following best describes nonvolatile memory?
  1.    memory that retains stored information when electrical power is removed
  2.    memory that loses stored information when electrical power is removed
  3.    magnetic memory
  4.    nonmagnetic memory
Explanation:-
Answer: Option A. -> memory that retains stored information when electrical power is removed
Question 8.  Which of the following RAM timing parameters determine(s) its operating speed?
  1.    tacc
  2.    taa and tacs
  3.    t1 and t3
  4.    trc and twc
Explanation:-
Answer: Option C. -> t1 and t3
Question 9. . Which of the following best describes static memory devices?
  1.    memory devices that are magnetic in nature and do not require constant refreshing
  2.    semiconductor memory devices in which stored data is retained as long as power is applied
  3.    memory devices that are magnetic in nature and require constant refreshing
  4.    semiconductor memory devices in which stored data will not be retained with the power applied unless constantly refreshed
Explanation:-
Answer: Option B. -> semiconductor memory devices in which stored data is retained as long as power is applied
Question 10. . A nonvolatile type of memory that can be programmed and erased in sectors, rather than one byte at a time is:
  1.    flash memory
  2.    EPROM
  3.    EEPROM
  4.    MPROM
Explanation:-
Answer: Option A. -> flash memory
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