8457318
Beschreibung
Quiz von Miguel Lucero, aktualisiert more than 1 year ago
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Erstellt von Miguel Lucero
vor etwa 7 Jahre
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1. A distributed database management system (DDBMS) governs the storage and processing of logically related data over interconnected computer systems.
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- True
- False
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2. Distributed data access was needed to support geographically dispersed business units.
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- True
- False
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3. Rapid ad hoc data became unnecessary in the quick-response decision-making environment.
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- True
- False
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4. The Internet is the repository for distributed data.
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- True
- False
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5. Current distributed database management system (DDBMS) are subject to some problems, such as the complexity of management and control
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- True
- False
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6. Distributed processing shares a database's logical processing among two or more physically independent sites that are connected through a network.
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- True
- False
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7. One of the advantages of a distributed database management system (DDBMS) is that the data is located near the site with the least demand.
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- True
- False
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8. One of the advantages of a distributed database management system (DDBMS) is growth facilitation.
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- True
- False
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9. One of the advantages of a distributed database management system (DDBMS) is security.
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- True
- False
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10. Distributed processing does not require a distributed database, and a distributed database does not require distributed processing.
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- True
- False
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11. In order to manage distributed data, copies or parts of the database processing functions must be distributed to all data storage sites.
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- True
- False
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12. A database management system (DBMS) must have validation, transformation, and mapping functions, as well as other functions, in order to be classified as distributed.
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- True
- False
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13. A fully distributed database management system (DBMS) must perform all the functions of a centralized DBMS, and it must handle all necessary functions imposed by the distribution of data and processing.
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- True
- False
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14. The transaction processor (TP) is the software component found in each computer that requests data.
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- True
- False
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15. A distributed database management system (DDBMS) must be communications-media-dependent.
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- True
- False
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16. A transaction processor (TP) is the software component residing on each computer that stores and retrieves data located at the site.
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- True
- False
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17. In the single-site processing, single-site data (SPSD) scenario, all processing must be done on the end user's side of the system.
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- True
- False
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18. Performance transparency ensures that the system finds the most cost-effective path to access remote data.
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- True
- False
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The level of transparency supported by the distributed database management system remains the same for all systems.
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- True
- False
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20. Distribution transparency is supported by a distributed data dictionary.
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- True
- False
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21. Distributed database systems do not require complex mechanisms to manage transactions and ensure the database's consistency and integrity.
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- True
- False
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22. A remote transaction, composed of several requests, may access data at multiple sites.
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- True
- False
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23. A centralized database management is subject to a problem such as____________
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a. a growing number of remote locations
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b. maintaining and operating small database systems
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c. dependence on multiple sites
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d. organizational flexibility of the database
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24. A disadvantage of a distributed database management system (DDBMS) is that:
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a. it is slower in terms of data access.
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b. adding new sites affects other sites' operations.
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c. it is processor dependent.
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d. there are lack of standards.
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25. A distributed database is composed of several parts known as database .
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a. sections
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b. fragments
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c. partitions
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d. parts
Frage 26
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26. Distributed processing does not require
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a. database processing functions to be distributed to all data storage sites.
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b. an existing distributed database.
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c. a network of interconnected components.
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d. multiple sites to share processing chores.
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27. A database management system needs to prepare the data for presentation to the end user or to an application program.
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a. security
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b. concurrency control
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c. formatting
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d. I/O interface
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28. The processor is the software component found in each computer that requests data. It receives and processes the application's data requests.
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a. database
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b. transaction
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c. data
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d. network
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29. In theory, a(n) can be an independent centralized database management system with proper interfaces to support remote access from other independent database management systems in the network.
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a. transaction processor
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b. application processor
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c. transaction manager
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d. data processor
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30. Under the scenario, all record- and file-locking activities are performed at the end-user location.
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a. single-site processing, single-site data
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b. multiple-site processing, single-site data
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c. single-site processing, multiple-site data
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d. multiple-site processing, multiple-site data
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31. _____ distributed database management system (DDBMS) integrate multiple instances of the same DBMS over a network.
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a. Homogeneous
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b. Heterogeneous
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c. Fully heterogeneous
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d. Combination
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32. A distributed database system will support different database management systems (DBMS) that may even support different models running under different computer systems.
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a. fully heterogeneous
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b. fully homogeneous
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c. homogeneous
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d. heterogeneous
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33. A DDBMS is subject to which of the following restrictions?
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a. Multiple instances of the same database should be integrated over a network.
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b. All database processing must be done at a single site.
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c. Rapid ad hoc data access is not possible.
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d. Remote data access is provided on a read-only basis.
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34. transparency allows a physically dispersed database to be managed as though it were centralized.
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a. Distribution
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b. Transaction
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c. Failure
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d. Performance
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35. transparency allows data to be updated simultaneously at several network sites.
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a. Transaction
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b. Distribution
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c. Failure
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d. Performance
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36. transparency allows the system to operate as if it were a centralized database management system.
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a. Heterogeneity
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b. Distribution
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c. Performance
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d. Failure
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transparency is the highest level of transparency. The end user or programmer does not need to know that a database is partitioned.
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a. Performance
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b. Fragmentation
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c. Location
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d. Local mapping
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38. transparency exists when the end user or programmer must specify the database fragment names but does not need to specify where these fragments are located.
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a. Transaction
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b. Location
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c. Local mapping
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d. Fragmentation
Frage 39
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39. A contains the description of the entire database as seen by the database administrator.
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a. distributed global dictionary
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b. distributed data dictionary
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c. distributed global schema
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d. distributed data schema
Frage 40
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40. A lets a single SQL statement access the data that are to be processed by a single remote database processor.
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a. remote request
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b. remote transaction
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c. distributed request
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d. distributed transaction
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41. A distributed can reference several different local or remote data processing sites.
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a. request
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b. site
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c. data location
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d. transaction
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42. A request lets a single SQL statement reference data located at several different local or remote DP sites.
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a. distributed
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b. transaction
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c. fragmented
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d. remote
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43. The 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.
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a. DO-UNDO-REDO protocol
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b. two-phase commit protocol (2PC)
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c. coordinator protocol
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d. write-ahead protocol
Frage 44
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44. The objective of optimization is to minimize the total cost associated with the execution of a request.
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a. data
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b. remote
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c. transaction
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d. query
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is the delay imposed by the amount of time required for a data packet to make a round trip from point A to point B.
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a. Data distribution
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b. Replica transparency
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c. Network latency
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d. Network partitioning
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fragmentation allows a user to break a single object into two or more segments, or fragments.
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a. Horizontal
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b. Vertical
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c. Data
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d. Request
Frage 47
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47. fragmentation refers to the division of a relation into subsets of tuples.
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a. Vertical
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b. Horizontal
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c. Data
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d. Mixed
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fragmentation refers to the division of a relation into attribute subsets.
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a. Data
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b. Horizontal
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c. Vertical
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d. Mixed
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49. The rule requires that all copies of data fragments be identical.
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a. shared fragment
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b. mutual consistency
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horizontal fragmentation
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d. replication
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50. A(n) database stores each database fragment at a single site.
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a. partially replicated
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b. unreplicated
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c. fully replicated
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d. partitioned
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