Quiz Discussion

A star schema has what type of relationship between a dimension and fact table?

Course Name: SQL -Structured Query Language

  • 1]

    One-to-one

  • 2]

    Many-to-many

  • 3]

    One-to-many

  • 4]

    All of the above

Solution
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# Quiz
1
Discuss

The extract process is which of the following?

  • 1]

    Capturing all of the data contained in various operational systems

  • 2]

    Capturing a subset of the data contained in various operational systems

  • 3]

    Capturing a subset of the data contained in various decision support systems

  • 4]

    Capturing all of the data contained in various decision support systems

Solution
2
Discuss

A shared database should

  • 1]

    be accurate and available

  • 2]

    be secure

  • 3]

    provide for backup and recovery

  • 4]

    All of the above

Solution
3
Discuss

The generic two-level data warehouse architecture includes which of the following?

  • 1]

    At least one data mart

  • 2]

    Data that can be extracted from numerous internal and external sources

  • 3]

    Near real-time updates

  • 4]

    All of the above

Solution
4
Discuss

A multifield transformation does which of the following?

  • 1]

    Converts data from one field into multiple fields

  • 2]

    Converts data from multiple fields into one field

  • 3]

    Converts data from multiple fields into multiple fields

  • 4]

    All of the above

Solution
5
Discuss

A data warehouse uses

  • 1]

    partial operational data

  • 2]

    future operational data

  • 3]

    historical operational data

  • 4]

    health care data

Solution
6
Discuss

A data warehouse is which of the following?

  • 1]

    Can be updated by end users

  • 2]

    Contains numerous naming conventions and formats

  • 3]

    Organized around important subject areas

  • 4]

    Contains only current data

Solution
7
Discuss

The active data warehouse architecture includes which of the following?

  • 1]

    At least one data mart

  • 2]

    Data that can extracted from numerous internal and external sources

  • 3]

    Near real-time updates

  • 4]

    All of the above

Solution
8
Discuss

Transient data is which of the following?

  • 1]

    Data in which changes to existing records cause the previous version of the records to be eliminated

  • 2]

    Data in which changes to existing records do not cause the previous version of the records to be eliminated

  • 3]

    Data that are never altered or deleted once they have been added

  • 4]

    Data that are never deleted once they have been added

Solution
9
Discuss

Data transformation includes which of the following?

  • 1]

    A process to change data from a detailed level to a summary level

  • 2]

    Joining data from one source into various sources of data

  • 3]

    A process to change data from a summary level to a detailed level

  • 4]

    Separating data from one source into various sources of data

Solution
10
Discuss

A database application can perform which of the following activities?

  • 1]

    Add records

  • 2]

    Update records

  • 3]

    Read records

  • 4]

    All of the above

Solution
# Quiz