Database Questions

Q:

 Legacy data is which of the following?

A) Data contained in a newly-installed system B) Data rejected during the installation of a new system
C) Data contained in a file system D) Data contained by a system used prior to the installation of a new system
 
Answer & Explanation Answer: D) Data contained by a system used prior to the installation of a new system

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Q:

Which of the following indicates the maximum number of entities that can be involved in a relationship?

A) Minimum cardinality B) Maximum cardinality
C) ERD D) Greater Entity Count (GEC)
 
Answer & Explanation Answer: B) Maximum cardinality

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Q:

SQL Server program code that is executed instead of an SQL command that needs to be processed is called

A) INSTEAD OF trigger. B) BEFORE trigger.
C) AFTER trigger. D) BEGIN trigger.
 
Answer & Explanation Answer: A) INSTEAD OF trigger.

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Q:

 A proxy server is used for which of the following?

A) To provide security against unauthorized users B) To process client requests for Web pages
C) To process client requests for database access D) To provide TCP/IP
 
Answer & Explanation Answer: A) To provide security against unauthorized users

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Q:

 To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

A) ONLY B) DISTINCT
C) UNIQUE D) SINGLE
 
Answer & Explanation Answer: B) DISTINCT

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Q:

 If a table has been normalized so that all determinants are candidate keys, then that table is in:

A) 1NF B) 2NF
C) 3NF D) BCNF
 
Answer & Explanation Answer: D) BCNF

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Q:

A collection of interrelated records is called a

A) Datasheet B) Spreadsheet
C) Database D) Utility File
 
Answer & Explanation Answer: C) Database

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Q:

 A composite attribute is which of the following?

A) An attribute that can be broken into components B) An attribute that cannot be broken into components
C) Multiple attributes D) An identifier
 
Answer & Explanation Answer: A) An attribute that can be broken into components

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