Exam 12: Distributed Database Management Systems

In order to manage distributed data,copies or parts of the database processing functions must be distributed to all data storage sites.

The ____________________ commit protocol guarantees that if a portion of a transaction operation cannot be committed,all changes made at the other sites participating in the transaction will be undone to maintain a consistent database state.

Under the ____ scenario,multiple processes run on different computers sharing a single data repository.

A transaction processor is also known as the ____________________ processor.

The World Wide Web (the Web)is the repository for distributed data.

____ transparency allows the system to perform as if it were a centralized database management system.

____ distributed database systems integrate different types of centralized DBMSs over a network.

____ distributed database systems integrate only one type of centralized DBMS over a network.

The ____ processor is the software component residing on each computer that stores and retrieves data located at the site.

A DBMS must have validation,transformation,and mapping functions,as well as other functions,in order to be classified as distributed.