Questions and answers for exam Preparation

MCQs

Total Questions : 30 | Page 1 of 3 pages

Question 1. A distributed database has which of the following advantages over a centralized database?

Discuss Question

Answer: Option B. -> Modular growth

Question 2. Location transparency allows for which of the following?

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Answer: Option C. -> All of these

Question 3. An autonomous homogenous environment is which of the following?

A different DBMS is at each node and a central DBMS coordinates database access.
The same DBMS is at each node and a central DBMS coordinates database access.
A different DBMS is at each node and each DBMS works independently.
The same DBMS is at each node and each DBMS works independently.

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Answer: Option D. -> The same DBMS is at each node and each DBMS works independently.

Question 4. A transaction manager is which of the following?

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Answer: Option B. -> All of these

Question 5. A heterogeneous distributed database is which of the following?

A different DBMS is used at each location and data are distributed across all nodes.
The same DBMS is used at each location and data are not distributed across all nodes.
A different DBMS is used at each location and data are not distributed across all nodes.
The same DBMS is used at each location and data are distributed across all nodes.

Discuss Question

Answer: Option A. -> A different DBMS is used at each location and data are distributed across all nodes.

Question 6. Some of the columns of a relation are at different sites is which of the following?

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Answer: Option A. -> Vertical Partitioning

Question 7. Storing a separate copy of the database at multiple locations is which of the following?

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Answer: Option D. -> Data Replication

Question 8. Replication should be used when which of the following exist?

The application's data can be somewhat out-of-date.
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.
All of these

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Answer: Option A. -> The application's data can be somewhat out-of-date.

Question 9. A homogenous distributed database is which of the following?

The same DBMS is used at each location and data are distributed across all nodes.
The same DBMS is used at each location and data are not distributed across all nodes.
A different DBMS is used at each location and data are distributed across all nodes.
A different DBMS is used at each location and data are not distributed across all nodes.

Discuss Question

Answer: Option A. -> The same DBMS is used at each location and data are distributed across all nodes.

Question 10. Which of the following is true concerning a global transaction?

The required data are at one local 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 located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

Discuss Question

Answer: Option D. -> The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.