14. A Hamming code 0010111 was received. The HC should have been 1111111 (based upon the data field received). What bit position is the error?

  1. 1
  2. 6
  3. 3
  4. 7
  5. 5

4 is CORRECT. The received code differs from the new Hamming code in the positions shown: 

     1234567
     0010111
     1111111
The two HC codes differ in bit positions 1,2 and 4 which sum to 7. Thus the error is in bit 7 in the received code.

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