Distributed Databases Questions

• An autonomous homogenous environment is which of the following?
• A transaction manager is which of the following?
• A distributed database is which of the following?
• Replication should be used when which of the following exist?
• Which of the following is a disadvantage of replication?
• A homogenous distributed database is which of the following?
• Some of the columns of a relation are at different sites is which of the following?
• Location transparency allows for which of the following?
• A distributed database has which of the following advantages over a centralized database?
• Which of the following is true concerning a global transaction?
• A semijoin is which of the following?
• A heterogeneous distributed database is which of the following?
• Storing a separate copy of the database at multiple locations is which of the following?
• Which of the following is not one of the stages in the evolution of distributed DBMS?
• A distributed database can use which of the following strategies?
• Synchronization for pull replication is less disruptive and occurs only when needed by each site, not when a central master site thinks it is best to update.
• Databases that are stored on computers at multiple locations and are not interconnected by a network are known as distributed databases.
• A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.
• The purpose of timestamping is to avoid the use of locks.
• The problem of concurrency control is more complex in a distributed database.