Data and Database Administration

Q1: Locking may cause which of the following problems?

A Erroneous updates

B Deadlock

C Versioning

D All of the above.

Q2: 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.

Q3: 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

Q4: 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.

Q5: 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

Q6: A shared lock allows which of the following types of transactions to occur?

A Delete

B Insert

C Read

D Update

Q7: 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

Q8: 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.

Q9: 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

Q10: 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

Q11: 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.

Q12: 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

Q13: 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

Q14: 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

Q15: 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.


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