ETC EngineeringMCQs
Home › Digital Electronics › A ROM used as a combinational logic device has 6 address inputs and 4 data outputs. How many stored output bits are required for its complete truth table?
MCQ Practice Question
Digital ElectronicsProgrammable Logic Devices

A ROM used as a combinational logic device has 6 address inputs and 4 data outputs. How many stored output bits are required for its complete truth table?

  • A24
  • B64
  • C128
  • D256
Report an error
Correct Answer: D. 256
Explanation: Six inputs select 2^6=64 addresses. Each address stores 4 output bits, so total storage is 64×4=256 bits.
Reference: Standard digital electronics: ROM logic implementation
Continue practicing: Digital Electronics MCQs or browse all MCQs.