Electronics-Combinational Logic Devices (PLD)

Electronics-Combinational Logic Devices (PLD)
1. Which type of PLD should be used to program basic logic functions?
  • PLA
  • PAL
  • CPLD
  • SLD
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2. The content of a simple programmable logic device (PLD) consists of:
  • fuse-link arrays
  • thousands of basic logic gates
  • advanced sequential logic functions
  • thousands of basic logic gates and advanced sequential logic functions
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3. Once a PAL has been programmed:
  • it cannot be reprogrammed.
  • its outputs are only active HIGHs
  • its outputs are only active LOWs
  • its logic capacity is lost
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4. PLAs, CPLDs, and FPGAs are all which type of device?
  • SLD
  • PLD
  • EPROM
  • SRAM
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5. The difference between a PLA and a PAL is:
  • the PLA has a programmable OR plane and a programmable AND plane, while the PAL only has a programmable AND plane
  • the PAL has a programmable OR plane and a programmable AND plane, while the PLA only has a programmable AND plane
  • the PAL has more possible product terms than the PLA
  • PALs and PLAs are the same thing.
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6. When referring to instruction words, a mnemonic is:
  • a short abbreviation for the operand address
  • a short abbreviation for the operation to be performed
  • a short abbreviation for the data word stored at the operand address
  • shorthand for machine language
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7. What is the difference between mnemonic codes and machine codes?
  • There is no difference.
  • Machine codes are in binary, mnemonic codes are in shorthand English.
  • Machine codes are in shorthand English, mnemonic codes are in binary.
  • Machine codes are in shorthand English, mnemonic codes are a high-level language.
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8.  Which bus is bidirectional?
  • data bus
  • control bus
  • address bus
  • multiplexed bus
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9. The software used to drive microprocessor-based systems is called:
  • assembly language programs
  • firmware
  • BASIC interpreter instructions
  • flowchart instructions
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10. A microprocessor unit, a memory unit, and an input/output unit form a:
  • CPU
  • compiler
  • microcomputer
  • ALU
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