Current DDBMSs are subject to some problems,such as the complexity of management and control.
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Q2: In order to manage distributed data, copies
Q15: A DBMS must have validation,transformation,and mapping functions,as
Q16: One of the advantages of a DDBMS
Q17: A fully distributed DBMS must perform all
Q21: _ distributed database systems integrate only one
Q23: _ transparency ensures that the system will
Q24: _ is the highest level of transparency.The
Q25: _ is a disadvantage of a DDBMS.
A)
Q28: A remote transaction,composed of several requests,may access
Q29: The processor is the software component residing
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