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- Question
Which of the following is a disadvantage of replication?
Options- A. Reduced network traffic
- B. If the database fails at one site, a copy can be located at another site.
- C. Each site must have the same storage capacity.
- D. Each transaction may proceed without coordination across the network.
- Correct Answer
- Each site must have the same storage capacity.
- 1. Replication should be used when which of the following exist?
Options- A. When transmission speeds and capacity in a network prohibit frequent refreshing of large tables.
- B. When using many nodes with different operating systems and DBMSs and database designs.
- C. The application's data can be somewhat out-of-date.
- D. All of the above. Discuss
- 2. A distributed database is which of the following?
Options- A. A single logical database that is spread to multiple locations and is interconnected by a network
- B. A loose collection of file that is spread to multiple locations and is interconnected by a network
- C. A single logical database that is limited to one location.
- D. A loose collection of file that is limited to one location. Discuss
- 3. A transaction manager is which of the following?
Options- A. Maintains a log of transactions
- B. Maintains before and after database images
- C. Maintains appropriate concurrency control
- D. All of the above. Discuss
- 4. An autonomous homogenous environment is which of the following?
Options- A. The same DBMS is at each node and each DBMS works independently.
- B. The same DBMS is at each node and a central DBMS coordinates database access.
- C. A different DBMS is at each node and each DBMS works independently.
- D. A different DBMS is at each node and a central DBMS coordinates database access. Discuss
- 5. A multifield transformation does which of the following?
Options- A. Converts data from one field into multiple fields
- B. Converts data from multiple fields into one field
- C. Converts data from multiple fields into multiple fields
- D. All of the above Discuss
- 6. A homogenous distributed database is which of the following?
Options- A. The same DBMS is used at each location and data are not distributed across all nodes.
- B. The same DBMS is used at each location and data are distributed across all nodes.
- C. A different DBMS is used at each location and data are not distributed across all nodes.
- D. A different DBMS is used at each location and data are distributed across all nodes. Discuss
- 7. Some of the columns of a relation are at different sites is which of the following?
Options- A. Data Replication
- B. Horizontal Partitioning
- C. Vertical Partitioning
- D. Horizontal and Vertical Partitioning Discuss
- 8. Location transparency allows for which of the following?
Options- A. Users to treat the data as if it is at one location
- B. Programmers to treat the data as if it is at one location
- C. Managers to treat the data as if it is at one location
- D. All of the above. Discuss
- 9. A distributed database has which of the following advantages over a centralized database?
Options- A. Software cost
- B. Software complexity
- C. Slow Response
- D. Modular growth Discuss
- 10. Which of the following is true concerning a global transaction?
Options- A. The required data are at one local site and the distributed DBMS routes requests as necessary.
- B. The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.
- C. The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.
- D. The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS. Discuss
Distributed Databases problems
Search Results
Correct Answer: The application's data can be somewhat out-of-date.
Correct Answer: A single logical database that is spread to multiple locations and is interconnected by a network
Correct Answer: All of the above.
Correct Answer: The same DBMS is at each node and each DBMS works independently.
Correct Answer: All of the above
Correct Answer: The same DBMS is used at each location and data are distributed across all nodes.
Correct Answer: Vertical Partitioning
Correct Answer: All of the above.
Correct Answer: Modular growth
Correct Answer: The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.
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