### Discussion :: Digital Computer Electronics - Section 2 (Q.No.49)

Saptarshi Ghosh said: (Dec 3, 2013) | |

The xor operation is responsible for Modulo 2 addition i.e. a+b => (a+b)(mod 2) for 1 bit binary computations e.g. CRC calculation. Hence half adder (adds 2 bits) called xor circuit. Carry(a AND b) is required if multi-bit calculation is needed as propagator. |

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