51) A data warehouse derives its data from: A) on-line transactions

51) A data warehouse derives its data from:

A) on-line transactions.

B) various operational data sources.

C) reports.

D) a datamart.

52) Which of the following will interfere with access to operational databases?

A) Unstructured and unpredictable use of data

B) Predictable use of data

C) Efficient transaction processing systems

D) All of the above

53) Information is processed data.

54) In practice, databases today may contain either data or information.

55) Metadata are data that describe the properties of other data.

56) Databases were developed as the first application of computers to data processing.

57) File processing systems have been replaced by database systems in most critical business applications today.

58) Unplanned duplicate data files are the rule rather than the exception in file processing systems.

59) With the traditional file processing approach, each application shares data files, thus enabling much data sharing.

60) Development starts from scratch with the traditional file processing approach because new file formats, descriptions, and file access logic must be designed for each new program.