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For a 4-bit binary up-counter currently at 0111, what is the next state after one active clock edge?

  • A0110
  • B1000
  • C1111
  • D0000
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Correct Answer: B. 1000
Explanation: 0111 is decimal 7. Incrementing by one gives decimal 8, represented by 1000 in four-bit binary.
Reference: Standard digital electronics: binary up-counter
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