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CHAPTER 12: DISTRIBUTED DATABASE MANAGEMENT SYSTEMS

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CIS 3365 Quiz on CHAPTER 12: DISTRIBUTED DATABASE MANAGEMENT SYSTEMS, created by Miguel Lucero on 06/04/2017.
Miguel Lucero
Quiz by Miguel Lucero, updated more than 1 year ago
Miguel Lucero
Created by Miguel Lucero over 7 years ago
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Resource summary

Question 1

Question
1. A distributed database management system (DDBMS) governs the storage and processing of logically related data over interconnected computer systems.
Answer
  • True
  • False

Question 2

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2. Distributed data access was needed to support geographically dispersed business units.
Answer
  • True
  • False

Question 3

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3. Rapid ad hoc data became unnecessary in the quick-response decision-making environment.
Answer
  • True
  • False

Question 4

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4. The Internet is the repository for distributed data.
Answer
  • True
  • False

Question 5

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5. Current distributed database management system (DDBMS) are subject to some problems, such as the complexity of management and control
Answer
  • True
  • False

Question 6

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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.
Answer
  • True
  • False

Question 7

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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.
Answer
  • True
  • False

Question 8

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8. One of the advantages of a distributed database management system (DDBMS) is growth facilitation.
Answer
  • True
  • False

Question 9

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9. One of the advantages of a distributed database management system (DDBMS) is security.
Answer
  • True
  • False

Question 10

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10. Distributed processing does not require a distributed database, and a distributed database does not require distributed processing.
Answer
  • True
  • False

Question 11

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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.
Answer
  • True
  • False

Question 12

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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.
Answer
  • True
  • False

Question 13

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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.
Answer
  • True
  • False

Question 14

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14. The transaction processor (TP) is the software component found in each computer that requests data.
Answer
  • True
  • False

Question 15

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15. A distributed database management system (DDBMS) must be communications-media-dependent.
Answer
  • True
  • False

Question 16

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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.
Answer
  • True
  • False

Question 17

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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.
Answer
  • True
  • False

Question 18

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18. Performance transparency ensures that the system finds the most cost-effective path to access remote data.
Answer
  • True
  • False

Question 19

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The level of transparency supported by the distributed database management system remains the same for all systems.
Answer
  • True
  • False

Question 20

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20. Distribution transparency is supported by a distributed data dictionary.
Answer
  • True
  • False

Question 21

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21. Distributed database systems do not require complex mechanisms to manage transactions and ensure the database's consistency and integrity.
Answer
  • True
  • False

Question 22

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22. A remote transaction, composed of several requests, may access data at multiple sites.
Answer
  • True
  • False

Question 23

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23. A centralized database management is subject to a problem such as____________
Answer
  • a. a growing number of remote locations
  • b. maintaining and operating small database systems
  • c. dependence on multiple sites
  • d. organizational flexibility of the database

Question 24

Question
24. A disadvantage of a distributed database management system (DDBMS) is that:
Answer
  • a. it is slower in terms of data access.
  • b. adding new sites affects other sites' operations.
  • c. it is processor dependent.
  • d. there are lack of standards.

Question 25

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25. A distributed database is composed of several parts known as database .
Answer
  • a. sections
  • b. fragments
  • c. partitions
  • d. parts

Question 26

Question
26. Distributed processing does not require
Answer
  • a. database processing functions to be distributed to all data storage sites.
  • b. an existing distributed database.
  • c. a network of interconnected components.
  • d. multiple sites to share processing chores.

Question 27

Question
27. A database management system needs to prepare the data for presentation to the end user or to an application program.
Answer
  • a. security
  • b. concurrency control
  • c. formatting
  • d. I/O interface

Question 28

Question
28. The processor is the software component found in each computer that requests data. It receives and processes the application's data requests.
Answer
  • a. database
  • b. transaction
  • c. data
  • d. network

Question 29

Question
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.
Answer
  • a. transaction processor
  • b. application processor
  • c. transaction manager
  • d. data processor

Question 30

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30. Under the scenario, all record- and file-locking activities are performed at the end-user location.
Answer
  • a. single-site processing, single-site data
  • b. multiple-site processing, single-site data
  • c. single-site processing, multiple-site data
  • d. multiple-site processing, multiple-site data

Question 31

Question
31. _____ distributed database management system (DDBMS) integrate multiple instances of the same DBMS over a network.
Answer
  • a. Homogeneous
  • b. Heterogeneous
  • c. Fully heterogeneous
  • d. Combination

Question 32

Question
32. A distributed database system will support different database management systems (DBMS) that may even support different models running under different computer systems.
Answer
  • a. fully heterogeneous
  • b. fully homogeneous
  • c. homogeneous
  • d. heterogeneous

Question 33

Question
33. A DDBMS is subject to which of the following restrictions?
Answer
  • a. Multiple instances of the same database should be integrated over a network.
  • b. All database processing must be done at a single site.
  • c. Rapid ad hoc data access is not possible.
  • d. Remote data access is provided on a read-only basis.

Question 34

Question
34. transparency allows a physically dispersed database to be managed as though it were centralized.
Answer
  • a. Distribution
  • b. Transaction
  • c. Failure
  • d. Performance

Question 35

Question
35. transparency allows data to be updated simultaneously at several network sites.
Answer
  • a. Transaction
  • b. Distribution
  • c. Failure
  • d. Performance

Question 36

Question
36. transparency allows the system to operate as if it were a centralized database management system.
Answer
  • a. Heterogeneity
  • b. Distribution
  • c. Performance
  • d. Failure

Question 37

Question
transparency is the highest level of transparency. The end user or programmer does not need to know that a database is partitioned.
Answer
  • a. Performance
  • b. Fragmentation
  • c. Location
  • d. Local mapping

Question 38

Question
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.
Answer
  • a. Transaction
  • b. Location
  • c. Local mapping
  • d. Fragmentation

Question 39

Question
39. A contains the description of the entire database as seen by the database administrator.
Answer
  • a. distributed global dictionary
  • b. distributed data dictionary
  • c. distributed global schema
  • d. distributed data schema

Question 40

Question
40. A lets a single SQL statement access the data that are to be processed by a single remote database processor.
Answer
  • a. remote request
  • b. remote transaction
  • c. distributed request
  • d. distributed transaction

Question 41

Question
41. A distributed can reference several different local or remote data processing sites.
Answer
  • a. request
  • b. site
  • c. data location
  • d. transaction

Question 42

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42. A request lets a single SQL statement reference data located at several different local or remote DP sites.
Answer
  • a. distributed
  • b. transaction
  • c. fragmented
  • d. remote

Question 43

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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.
Answer
  • a. DO-UNDO-REDO protocol
  • b. two-phase commit protocol (2PC)
  • c. coordinator protocol
  • d. write-ahead protocol

Question 44

Question
44. The objective of optimization is to minimize the total cost associated with the execution of a request.
Answer
  • a. data
  • b. remote
  • c. transaction
  • d. query

Question 45

Question
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.
Answer
  • a. Data distribution
  • b. Replica transparency
  • c. Network latency
  • d. Network partitioning

Question 46

Question
fragmentation allows a user to break a single object into two or more segments, or fragments.
Answer
  • a. Horizontal
  • b. Vertical
  • c. Data
  • d. Request

Question 47

Question
47. fragmentation refers to the division of a relation into subsets of tuples.
Answer
  • a. Vertical
  • b. Horizontal
  • c. Data
  • d. Mixed

Question 48

Question
fragmentation refers to the division of a relation into attribute subsets.
Answer
  • a. Data
  • b. Horizontal
  • c. Vertical
  • d. Mixed

Question 49

Question
49. The rule requires that all copies of data fragments be identical.
Answer
  • a. shared fragment
  • b. mutual consistency
  • horizontal fragmentation
  • d. replication

Question 50

Question
50. A(n) database stores each database fragment at a single site.
Answer
  • a. partially replicated
  • b. unreplicated
  • c. fully replicated
  • d. partitioned
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