Distributed Databases A transaction manager is which of the following? Maintains appropriate concurrency control Maintains before and after database images Maintains a log of transactions All of these Maintains appropriate concurrency control Maintains before and after database images Maintains a log of transactions All of these ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases A distributed database is which of the following? A loose collection of file that is limited to one location. A single logical database that is limited to one location. A single logical database that is spread to multiple locations and is interconnected by a network A loose collection of file that is spread to multiple locations and is interconnected by a network A loose collection of file that is limited to one location. A single logical database that is limited to one location. A single logical database that is spread to multiple locations and is interconnected by a network A loose collection of file that is spread to multiple locations and is interconnected by a network ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Location transparency allows for which of the following? All of these Managers to treat the data as if it is at one location Programmers to treat the data as if it is at one location Users to treat the data as if it is at one location All of these Managers to treat the data as if it is at one location Programmers to treat the data as if it is at one location Users to treat the data as if it is at one location ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Which of the following is not one of the stages in the evolution of distributed DBMS? Distributed request Unit of work Remote unit of work Distributed unit of Work Distributed request Unit of work Remote unit of work Distributed unit of Work ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases In a semijoin, only the joining attribute is sent from one site to another, and then only the required rows are returned. False True False True ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Some of the columns of a relation are at different sites is which of the following? Horizontal and Vertical Partitioning Vertical Partitioning Data Replication Horizontal Partitioning Horizontal and Vertical Partitioning Vertical Partitioning Data Replication Horizontal Partitioning ANSWER DOWNLOAD EXAMIANS APP
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