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  1. The number of cross point needed for 10 lines in a cross point switch which is full duplex in nature and there are no self connection is

    2. A.

     100
    B.

     45
    C.

     50
    D.

     90

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    Answer : Option B

    Explanation :

    As all lines are full-duplex and there are no self connections, only the cross points above the diagonals are needed. Hence formula for the number of cross points required is n(n-1)/2.

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