Database

Database

Data and Database Administration has 30 Questions

Poor data administration can lead to which of the following?

A single definition of the same data entity
Familiarity with existing data
Missing data elements
All of the above.
To build a data warehouse and develop business intelligence applications, it is important that an organization build and maintain a comprehensive repository.

True
False
A traditional data administrator performs which of the following roles?

Tune database performance
Establish backup and recovery procedures
Resolve data ownership issues
Protect the security of the database.
Failure to control confidentiality may lead to loss of competitiveness.

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

Data modeling
Database design
Metadata
All of the above.
Authorization tables contain highly sensitive data and should be protected by stringent security rules.

True
False
Which of the following is part of an administrative policy to secure a database?

Authentication policies
Limiting particular areas within a building to only authorized people
Ensure appropriate responses rates are in external maintenance agreements
All of the above.
A transaction log shows before and after images of records that have been modified by transactions.

True
False
Backward recovery is which of the following?

Where the before-images are applied to the database
Where the after-images are applied to the database
Where the after-images and before-images are applied to the database
Switching to an existing copy of the database
The greatest threat to business security is often internal rather than external.

True
False
The transaction log includes which of the following?

The before-image of a record
The after-image of a record
The before and after-image of a record
The essential data of the record
Information repositories are replacing data dictionaries in many organizations.

True
False
Which of the following could cause data to be unavailable?

Data becoming lost or inaccurate
The database server
Planned database maintenance activities
All of the above.
Mirrored databases are almost always provided in high-availability systems.

True
False
A shared lock allows which of the following types of transactions to occur?

Delete
Insert
Read
Update
Databases are not the property of a single function or individual within the organization.

True
False
Locking may cause which of the following problems?

Erroneous updates
Deadlock
Versioning
All of the above.
Queries that do full table scans should be avoided.

True
False
Performance analysis and tuning is which of the following?

Undertaken one time at the time of a DBMS installation
Undertaken one time at the time of the implementation of a new application
Undertaken as an ongoing part of the backup of a database
Undertaken as an ongoing part of managing a database
The restore/rerun technique involves reprocessing the day's transactions up to the point of failure.

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

Rollback
Rollforward
Switch to duplicate database
Reprocess transactions
Backward recovery is used to reverse the changes made by transactions that have aborted, or terminated abnormally.

True
False
Which of the following is true concerning open-source DBMS?

Is free or nearly free database software whose source code is publicly available
Is free or nearly free database software whose source code is not publicly available
Is not competitive against PC-oriented packages and is fully SQL compliant
Is competitive against PC-oriented packages and is not fully SQL compliant
A disaster recovery plan does not need to include the shipment of database backups to other sites.

True
False
Concurrency control is important for which of the following reasons?

To ensure data integrity when updates occur to the database in a multiuser environment
To ensure data integrity when updates occur to the database in a single-user environment
To ensure data integrity while reading data occurs to the database in a multiuser environment
To ensure data integrity while reading data occurs to the database in a single-user environment
With concurrent processing involving updates, a database with concurrency control will be compromised due to interference between users.

True
False
Which of the following is the preferred way to recover a database after a system failure?

Rollback
Rollforward
Switch to duplicate database
Reprocess transactions
Data modeling and database design are key responsibilities of data and data base administration.

True
False
A data warehouse administrator is concerned with which of the following?

The time to make a decision but not the typical roles of a database administrator
The time to make a decision and the typical roles of a database administrator
The typical roles of a data administrator and redesigning existing applications
The typical roles of a database administrator and redesigning existing applications
Incorrect data is easy to detect.

True
False