Distributed Databases Which of the following is not one of the stages in the evolution of distributed DBMS? Distributed unit of Work Distributed request Remote unit of work Unit of work Distributed unit of Work Distributed request Remote unit of work Unit of work ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases Replication should be used when which of the following exist? When using many nodes with different operating systems and DBMSs and database designs. The application's data can be somewhat out-of-date. All of these When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. When using many nodes with different operating systems and DBMSs and database designs. The application's data can be somewhat out-of-date. All of these When transmission speeds and capacity in a network prohibit frequent refreshing of large tables. 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 Which of the following is true concerning a global transaction? The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary. The required data are at one local site and the distributed DBMS passes the request to only the local DBMS. The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS routes requests as necessary. The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary. The required data are at one local site and the distributed DBMS passes the request to only the local DBMS. The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS. The required data are at one local site and the distributed DBMS routes requests as necessary. ANSWER DOWNLOAD EXAMIANS APP
Distributed Databases The problem of concurrency control is more complex in a distributed database. 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 Data Replication Vertical Partitioning Horizontal Partitioning Horizontal and Vertical Partitioning Data Replication Vertical Partitioning Horizontal Partitioning ANSWER DOWNLOAD EXAMIANS APP
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