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Exam 4: Database Processing

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Question 21

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Which of the following is true about the database development process?

A) The easiest time to change the database structure is during the data modeling stage.
B) Changing a relationship from 1:N to N:M in an existing database is simply a matter of changing notations.
C) User review of the data model is avoided as it is not helpful in data modeling.
D) A database is a model of how the developers view their business world.

E) A) and B)
F) All of the above

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Question 22

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Which of the following is a nonrelational data store developed by Google?

A) Cassandra
B) Dynamo
C) SharePoint
D) Bigtable

E) C) and D)
F) None of the above

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Question 23

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A user does not need user account credentials to access and process a database.

________ are the final judges as to what data the database should contain and how the records in that database should be related to one another.

Which of the following data elements is placed higher than records in the database hierarchy?

A(n) ________ is a program used to create,process,and administer a database.

Identify the open source DBMS product among the following.

A database management system (DBMS)is a program used to create,process,and administer a database.

Which of the following is a nonrelational data store developed by Amazon?

Describe a database and its various elements.

How does normalization resolve the data integrity problem?

The purpose of a database is to keep track of things that involve a single theme.

The columns in a database are called ________.

A(n) ________ is a request for data from a database.

When you modify or delete data present in a database,you are ________.

Columns that are keys to different tables than the ones in which they reside are called ________.

A key is a column or group of columns that identifies a unique row in a table.

Minimum cardinalities represent the lower limit on the number of entities required in a relationship.

A data model describes data and relationships that will be stored in the database.

________ is the process of converting a data model into tables,relationships,and data constraints.