Database - Data and Database Administration MCQs Part

1. Poor data administration can lead to which of the following?

A.
A single definition of the same data entity
B.
Familiarity with existing data
C.
Missing data elements
D.
All of the above.

 Answer Option C

2. A traditional data administrator performs which of the following roles?

A.
Tune database performance
B.
Establish backup and recovery procedures
C.
Resolve data ownership issues
D.
Protect the security of the database.

 Answer Option C

3. If both data and database administration exist in an organization, the database administrator is responsible for which of the following?

A.
Data modeling
B.
Database design
C.
Metadata
D.
All of the above.

 Answer Option B

4. Which of the following is part of an administrative policy to secure a database?

A.
Authentication policies
B.
Limiting particular areas within a building to only authorized people
C.
Ensure appropriate responses rates are in external maintenance agreements
D.
All of the above.

 Answer Option D

5. Backward recovery is which of the following?

A.
Where the before-images are applied to the database
B.
Where the after-images are applied to the database
C.
Where the after-images and before-images are applied to the database
D.
Switching to an existing copy of the database

 Answer Option A

6. The transaction log includes which of the following?

A. The before-image of a record
B. The after-image of a record
C. The before and after-image of a record
D. The essential data of the record

 Answer Option D

7. Which of the following could cause data to be unavailable?

A. Data becoming lost or inaccurate
B. The database server
C. Planned database maintenance activities
D. All of the above.

 Answer Option D

8. A shared lock allows which of the following types of transactions to occur?

A. Delete
B. Insert
C. Read
D. Update

 Answer Option C

9. Locking may cause which of the following problems?

A. Erroneous updates
B. Deadlock
C. Versioning
D. All of the above.

 Answer Option B

10. Performance analysis and tuning is which of the following?

A. Undertaken one time at the time of a DBMS installation
B. Undertaken one time at the time of the implementation of a new application
C. Undertaken as an ongoing part of the backup of a database
D. Undertaken as an ongoing part of managing a database

 Answer Option D

11. Which of the following is the preferred way to recover a database after a transaction in progress terminates abnormally?

A. Rollback
B. Rollforward
C. Switch to duplicate database
D. Reprocess transactions

 Answer Option A

12. Which of the following is true concerning open-source DBMS?

A. Is free or nearly free database software whose source code is publicly available
B. Is free or nearly free database software whose source code is not publicly available
C. Is not competitive against PC-oriented packages and is fully SQL compliant
D. Is competitive against PC-oriented packages and is not fully SQL compliant

 Answer Option A

13. Concurrency control is important for which of the following reasons?

A. To ensure data integrity when updates occur to the database in a multiuser environment
B. To ensure data integrity when updates occur to the database in a single-user environment
C. To ensure data integrity while reading data occurs to the database in a multiuser environment
D. To ensure data integrity while reading data occurs to the database in a single-user environment

 Answer Option A

14. Which of the following is the preferred way to recover a database after a system failure?

A. Rollback
B. Rollforward
C. Switch to duplicate database
D. Reprocess transactions

 Answer Option C

15. A data warehouse administrator is concerned with which of the following?

A. The time to make a decision but not the typical roles of a database administrator
B. The time to make a decision and the typical roles of a database administrator
C. The typical roles of a data administrator and redesigning existing applications
D. The typical roles of a database administrator and redesigning existing applications

 Answer Option B

6. The transaction log includes which of the following?

A. The before-image of a record
B. The after-image of a record
C. The before and after-image of a record
D. The essential data of the record

 Answer Option D

7. Which of the following could cause data to be unavailable?

A. Data becoming lost or inaccurate
B. The database server
C. Planned database maintenance activities
D. All of the above.

 Answer Option D

8. A shared lock allows which of the following types of transactions to occur?

A. Delete
B. Insert
C. Read
D. Update

 Answer Option C

9. Locking may cause which of the following problems?

A. Erroneous updates
B. Deadlock
C. Versioning
D. All of the above.

 Answer Option B

10. Performance analysis and tuning is which of the following?

A. Undertaken one time at the time of a DBMS installation
B. Undertaken one time at the time of the implementation of a new application
C. Undertaken as an ongoing part of the backup of a database
D. Undertaken as an ongoing part of managing a database

 Answer Option D

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