Filters
Question type

Study Flashcards

Relational DBMSs use ________ rules to ensure that relationships between coupled tables remain consistent.

Correct Answer

verifed

verified

referentia...

View Answer

You are creating a database to store temperature and wind data from national airport locations. Which of the following fields is the most likely candidate to use as the basis for a primary key in the Airport table?


A) address
B) city
C) airport code
D) state

Correct Answer

verifed

verified

A(n) ________ view shows data as it is actually organized and structured on the data storage media.

Correct Answer

verifed

verified

High-speed ________ use both relational and non-relational tools to analyze large datasets.

Correct Answer

verifed

verified

The type of logical database model that treats data as if they were stored in two-dimensional tables is the


A) non-relational DBMS.
B) mobile DBMS.
C) relational DBMS.
D) hierarchical DBMS.

Correct Answer

verifed

verified

A DBMS reduces data redundancy and inconsistency by


A) enforcing referential integrity.
B) uncoupling program and data.
C) utilizing a data dictionary.
D) minimizing isolated files with repeated data.

Correct Answer

verifed

verified

Every record in a file should contain at least one key field.

Correct Answer

verifed

verified

The small publishing company you work for wants to create a new database for storing information about all of their author contracts. What factors will influence how you design the database?

Correct Answer

verifed

verified

Student answers will vary, but should in...

View Answer

OLAP is a tool for enabling


A) users to obtain online answers to ad-hoc questions in a rapid amount of time.
B) users to view both logical and physical views of data.
C) programmers to quickly diagram data relationships.
D) programmers to normalize data.

Correct Answer

verifed

verified

Oracle Database Lite is a(n)


A) DBMS for small handheld computing devices.
B) Internet DBMS.
C) mainframe relational DBMS.
D) DBMS for midrange computers.

Correct Answer

verifed

verified

Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is called


A) data auditing.
B) defragmentation.
C) data scrubbing.
D) data optimization.

Correct Answer

verifed

verified

A data warehouse may be updated by a legacy system.

Correct Answer

verifed

verified

Data mining is a tool for allowing users to


A) quickly compare transaction data gathered over many years.
B) find hidden relationships in data.
C) obtain online answers to ad-hoc questions in a rapid amount of time.
D) summarize massive amounts of data into much smaller, traditional reports.

Correct Answer

verifed

verified

In a relational database, a record is referred to in technical terms as a(n)


A) tuple.
B) row.
C) entity.
D) field.

Correct Answer

verifed

verified

An automated or manual file that stores information about data elements and data characteristics such as usage, physical representation, ownership, authorization, and security is the


A) data dictionary.
B) data definition diagram.
C) entity-relationship diagram.
D) relationship dictionary.

Correct Answer

verifed

verified

You work for a national car rental agency and want to determine what characteristics are shared among your most loyal customers. To do this, you will want to use data mining software that is capable of


A) identifying associations.
B) identifying clusters.
C) identifying sequences.
D) classification.

Correct Answer

verifed

verified

The join operation


A) combines relational tables to provide the user with more information than is otherwise available.
B) identifies the table from which the columns will be selected.
C) creates a subset consisting of columns in a table.
D) organizes elements into segments.

Correct Answer

verifed

verified

In terms of data relationships, associations refers to


A) events linked over time.
B) patterns that describe a group to which an item belongs.
C) occurrences linked to a single event.
D) undiscovered groupings.

Correct Answer

verifed

verified

Databases record information about general categories of information referred to as ________.

Correct Answer

verifed

verified

A DBMS makes the


A) physical database available for different logical views.
B) logical database available for different analytical views.
C) physical database available for different analytical views.
D) logical database available for different physical views.

Correct Answer

verifed

verified

Showing 61 - 80 of 90

Related Exams

Show Answer