Quiz Discussion

Which of the following is true for a relational database?

Course Name: SQL -Structured Query Language

  • 1]

    Data is represented by tables

  • 2]

    Complex programs have to be written for simple queries

  • 3]

    It is difficult to access data

  • 4]

    All of the above

Solution
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# Quiz
1
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
2
Discuss

The load and index are which of the following?

  • 1]

    A process to reject data from the data warehouse and to create the necessary indexes

  • 2]

    A process to load the data in the data warehouse and to create the necessary indexes

  • 3]

    A process to upgrade the quality of data before it is moved into a data warehouse

  • 4]

    A process to upgrade the quality of data after it is moved into a data warehouse

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

Reconciled data is which of the following?

  • 1]

    Data stored in the various operational systems throughout the organization

  • 2]

    Current data intended to be the single source for all decision support systems

  • 3]

    Data stored in one operational system in the organization

  • 4]

    Data that has been selected and formatted for end-user support applications

Solution
5
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
6
Discuss

Data scrubbing is which of the following?

  • 1]

    A process to reject data from the data warehouse and to create the necessary indexes

  • 2]

    A process to load the data in the data warehouse and to create the necessary indexes

  • 3]

    A process to upgrade the quality of data after it is moved into a data warehouse

  • 4]

    A process to upgrade the quality of data before it is moved into a data warehouse

Solution
7
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
8
Discuss

An enterprise database is which of the following?

  • 1]

    A database designed to support only users external to an organization

  • 2]

    A database designed to support an entire organization

  • 3]

    A database designed to support a single PC

  • 4]

    A database designed to support a relatively small group

Solution
9
Discuss

Legacy data is which of the following?

  • 1]

    Data contained in a newly-installed system

  • 2]

    Data contained in a file system

  • 3]

    Data rejected during the installation of a new system

  • 4]

    Data contained by a system used prior to the installation of a new system

Solution
10
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
# Quiz