Programmable Logic Devices (Pld) MCQs

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Once a PAL has been programmed:

  • A. it cannot be reprogrammed.
  • B. its outputs are only active HIGHs
  • C. its outputs are only active LOWs
  • D. its logic capacity is lost
  • Correct Answer: Option A

PLAs, CPLDs, and FPGAs are all which type of device?

  • A. SLD
  • B. PLD
  • C. EPROM
  • D. SRAM
  • Correct Answer: Option B

The basic programmable logic array (PLA) contains a set of _____ gates, _____ gates, and ______ gates.

  • A. NOT, NAND, OR
  • B. NOT, AND, OR
  • C. NAND, AND, NOR
  • D. OR, NOR, AND
  • Correct Answer: Option B

The complex programmable logic device (CPLD) contains several PLD blocks and:

  • A. field-programmable switches
  • B. AND/OR arrays
  • C. a global interconnection matrix
  • D. a language compiler
  • Correct Answer: Option C

The content of a simple programmable logic device (PLD) consists of:

  • A. fuse-link arrays
  • B. thousands of basic logic gates
  • C. advanced sequential logic functions
  • D. thousands of basic logic gates and advanced sequential logic functions
  • Correct Answer: Option D

The difference between a PLA and a PAL is:

  • A. the PLA has a programmable OR plane and a programmable AND plane, while the PAL only has a programmable AND plane
  • B. the PAL has a programmable OR plane and a programmable AND plane, while the PLA only has a programmable AND plane
  • C. the PAL has more possible product terms than the PLA
  • D. PALs and PLAs are the same thing.
  • Correct Answer: Option A

The OR array in a PAL is ________.

  • A. fixed
  • B. programmable
  • C. nonexistent; there is no OR array in a PAL
  • D. floating
  • Correct Answer: Option A

Which type of PLD should be used to program basic logic functions?

  • A. PLA
  • B. PAL
  • C. CPLD
  • D. SLD
  • Correct Answer: Option B