Exam 3: Database Systems,data Warehouses,and Data Marts

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A(n) _____ is software for creating,storing,maintaining,and accessing database files.

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database management system (DBMS)

In a(n) _____ data model,each record can have multiple parent and child records.

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A

The use of OR operator means that only one of the conditions in an SQL statement must be met.

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Although a database can consist of only a single file,it is usually a group of files.

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A _____ is usually a smaller version of a data warehouse,used by a single department or function.

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As compared to data warehouses,consolidating information from different departments or functional areas is easier in data marts.

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Data warehouses are sometimes called "hypercubes" because they_____.

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The network data model is similar to the hierarchical data model because records are organized in the same way.

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Describe the features and benefits of an object-oriented database.

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List and describe the features of data in a data warehouse in contrast to data in a database.

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The _____ component of a database management system (DBMS) is used to add,delete,modify,and retrieve records from a database.

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A database engine converts logical requests from users into their physical equivalents by interacting with other components of the database management system (DBMS).

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In a relational model,the rows are called attributes and the columns are called tuples.

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Which of the following statements is true of big data?

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With the indexed sequential access method (ISAM),records cannot be accessed randomly.

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The indexed sequential access method (ISAM) is slow and becomes increasingly useful as the number of records becomes larger.

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What are some of the sources of external data?

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An advantage that a database has over a flat file system is that more information can be generated from the same data.

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_____ is information about data-its content,quality,condition,origin,and other characteristics.

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What is the function of a distributed database management system (DDBMS)?

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