Consider a relation R ( A,B,C,D ) with the following dependencies: AB ? C, CD ? E, DE ?B.A.ABB.ABCC.ABDD.ABE

题目

Consider a relation R ( A,B,C,D ) with the following dependencies: AB ? C, CD ? E, DE ?B.

A.AB

B.ABC

C.ABD

D.ABE


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  • 第1题:

    党参是( )

    A.A

    B.B

    C.C

    D.D

    E.E


    正确答案:A

  • 第2题:

    What are three purposes of a PSNP?()

    A.A

    B.B

    C.C

    D.D

    E.E


    参考答案:C, D, E

  • 第3题:

    What information do OSPF hello packets contain?()

    A.A

    B.B

    C.C

    D.D

    E.E


    参考答案:A, C, D

  • 第4题:

    板蓝根是( )

    A.A

    B.B

    C.C

    D.D

    E.E


    正确答案:C

  • 第5题:

    What are the three OSPF authentication methods supported on the ERX Edge Router?()

    A.A

    B.B

    C.C

    D.D

    E.E


    参考答案:A, B, C

  • 第6题:

    Whichthreetabletransformationscanbedoneusingonlineredefinitionoftables?()

    A.A

    B.B

    C.C

    D.D

    E.E


    参考答案:B, C, E