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      Question

      Which of the following is TRUE for PROM

      memories?
      A It has programable AND gate and fixed OR gate. Correct Answer Incorrect Answer
      B It has programable AND gate and programable OR gate. Correct Answer Incorrect Answer
      C It has fixed AND gate and programable OR gate. Correct Answer Incorrect Answer
      D It has fixed AND gate and fixed OR gate. Correct Answer Incorrect Answer

      Solution

      PROM (Programmable Read Only Memory) is a type of ROM in which the data is written once after manufacturing by the user. Its internal structure is such that the AND gate array is fixed to generate all possible minterms, while the OR gate array is programmable so that selected minterms can be combined to implement the desired output logic. Hence, PROM is known as a "fixed AND – programmable OR" type of memory.

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