Exam 9: Database Management Approaches

When a centralized database becomes unavailable for any reason,no users can continue processing. In contrast,if a local database in a distributed database becomes unavailable,only users who need that data are affected. Because of this,distributed databases have a(n) ____ advantage over a centralized database.

Extensible Markup Language (XML) is a metalanguage.

Each digital document on the Web is called a ____.

____________________ indicates the number of objects that can be related to an individual object at the other end of the relationship.

When relational databases store complex objects,these special data types are known as CLOBs.

Computers in a network communicate through ____.

Which of the following is an advantage of distributed databases?

If the client only performs the presentation functions (and not the business functions),then the client is known as a thin client.

A(n) _________________________ is a DBMS capable of supporting and manipulating distributed databases.

____ refers to the association of an operation to actual program code.

_____ is a standard interface that provides the capability necessary for Web browsers to communicate with server-side extensions.

____________________ implies that you define an object to contain both the data and its associated actions.

Access to a data warehouse is accomplished through the use of OLAP software.

With ____________________ visibility,any other class can view or update the value of an attribute.

What are the advantages of a client/server system?

A characteristic of a DDBMS that states that users do not need to be aware of the location of the data in a database is known as replication transparency.

What is the purpose of the following UML diagrams: class,use case,sequence,and activity?

In ____ systems,data and actions are encapsulated.

To execute the steps in a method,the user sends a(n) ____________________ to the object.

A local deadlock involves one transaction that requires a record held by a second transaction at one site,while the second transaction requires a record held by the first transaction at a different site.