Data and Database Administration - General Questions

1.

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

Explanation:

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2.

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

Explanation:

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3.

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

Explanation:

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4.

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

Explanation:

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5.

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

Explanation:

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6.

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

Explanation:

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7.

Locking may cause which of the following problems?

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

Answer: Option B

Explanation:

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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

Explanation:

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