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Database Organization & Design MCQ

The conversion of an unnormalized table to first normal form requires the removal of ____.

Answer

Correct Answer: Repeating groups

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Oracle 12c, ms sql server, and tamino are examples of _____ data models.

Answer

Correct Answer: XML Hybrid

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One remedy for the inconsistencies caused by concurrent processing is ________.

Answer

Correct Answer: Resource locking

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In access, dates are enclosed in number signs and are entered using the format ____.

Answer

Correct Answer: ​MM/DD/YYYY

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In many cases, a subquery can be restated as a/an ______________.

Answer

Correct Answer: Join

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In the broadest definition, a(n) ____ is a collection of information.

Answer

Correct Answer: Database

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In the _____ model, each parent can have many children, but each child has only one parent.

Answer

Correct Answer: Hierarchical

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In object-oriented terms, a(n) ____________________ defines an objects behavior.

Answer

Correct Answer: Method

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Data redundancies occur from ____________________ of data on every row entry.

Answer

Correct Answer: Duplication

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Creating the conceptual design and selecting dbms software are part of the ____ phase of the dblc.

Answer

Correct Answer: Database design

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The traditional systems development life cycle (sdlc) is divided into _____ phases.

Answer

Correct Answer: Five

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_____ fragmentation refers to the division of a relation into attribute subsets.

Answer

Correct Answer: Vertical

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To override the order of precedence in an arithmetic expression, you can use __________________.

Answer

Correct Answer: Parentheses

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Making sure all ____ are identified is a very important part of a database designers job.

Answer

Correct Answer: Business rules

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A(n) ____________________ is a collection of similar objects with a shared structure and behavior.

Answer

Correct Answer: Class

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A(n) _____ relationship is also known as an identifying relationship.

Answer

Correct Answer: Solid

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The process of creating an information system is known as _____.

Answer

Correct Answer: Systems development

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The stddev function can be used with ____ columns.

Answer

Correct Answer: Numeric

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To avoid the display of a security warning when opening a database, place the database ____.

Answer

Correct Answer: In a trusted folder

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The ____ wildcard symbol represents any individual character.

Answer

Correct Answer: Underscore ( _ )

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Sql server supports ________________ of the ansi-standard data types

Answer

Correct Answer: Some, but not all

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Non-overlapping subtypes are subtypes that contain a(n) ____ subset of the supertype entity set.

Answer

Correct Answer: Unique

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Most data that can be encountered are best classified as _____.

Answer

Correct Answer: Semistructured

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A trigger is stored and compiled on the ____.

Answer

Correct Answer: Server

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The product of two tables is formally called the ____ product.

Answer

Correct Answer: CREATE TABLE

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The relationships between the sizes of different parts of a work make up its ________.

Answer

Correct Answer: Hierarchical scale

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Access does not support the ____ data type.

Answer

Correct Answer: DECIMAL

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A(n)_____ specifically reserves access to the transaction that locked the object.

Answer

Correct Answer: Exclusive lock

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A(n) ____ database stores each database fragment at a single site.

Answer

Correct Answer: Unreplicated

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Set the ____ property to no to prevent users from using the tab key to navigate to a control.

Answer

Correct Answer: Tab Stop

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The sql command ________ adds one or more new columns to a table.

Answer

Correct Answer: Alter table

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The maximum width of the number datatype is ____ digits.

Answer

Correct Answer: 38

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To create a new table by using a select statement, you code the ___________________________ clause.

Answer

Correct Answer: INTO

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The conceptual model can handle _____ relationships and multivalued attributes.

Answer

Correct Answer: M:N

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A ____ identifier is composed of more than one attribute.

Answer

Correct Answer: Composite

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Use the ________ tag to configure a section of a web page that is physically separated from others.

Answer

Correct Answer:


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The term "____" is used to label any condition in which one or more optional relationships exist.

Answer

Correct Answer: Optionality

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The existence of a(n) __________ entity indicates that its minimum cardinality is zero.

Answer

Correct Answer: Optional

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A(n) _____ is the equivalent of a field in a file system.

Answer

Correct Answer: Attribute

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Business rules are derived from ____.

Answer

Correct Answer: Entity

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Some ____ database modeling concepts can be expressed only using the chen notation.

Answer

Correct Answer: Conceptual

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One of the limitations of the ____ model is that there is a lack of standards.

Answer

Correct Answer: Hierarchical

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A(n) ____ model represents a global view of the database as viewed by the entire organization.

Answer

Correct Answer: Conceptual

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A derived attribute is indicated in the chen model by a ____.

Answer

Correct Answer: Dashed line.

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A(n) ____ is an ordered arrangement of keys and pointers.

Answer

Correct Answer: Index

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A union combines the rows from two or more _______________________.

Answer

Correct Answer: Inner

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A(n) ____'s main function is to help you understand the complexities of the real-world environment.

Answer

Correct Answer: Model

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A(n) _____ develops when all required changes in the redundant data are not made successfully.

Answer

Correct Answer: Anomaly

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A(n) ____ is a system-generated primary key that is usually hidden from users.

Answer

Correct Answer: Surrogate key

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A(n) ____ clause cannot include a group function.

Answer

Correct Answer: WHERE

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When using the oracle to_date function, the code _____ represents a three-letter month name.

Answer

Correct Answer: MON

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In the figure above, if you only want to set one criterion for this filter, you will ____.

Answer

Correct Answer: Leave the lower boxes empty

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In oracle, the _____ function converts a date to a character string.

Answer

Correct Answer: TO_CHAR()

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Date attributes contain calendar dates stored in a special format known as the _____ date format.

Answer

Correct Answer: Julian

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A subquery must include a(n) ____ clause.

Answer

Correct Answer: SELECT

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A person?s social security number would be an example of a(n) ____________________ attribute.

Answer

Correct Answer: Single-valued

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A(n) ____ is the association between entities.

Answer

Correct Answer: Relationship

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The proper use of ____________________ keys is crucial to controlling data redundancy.

Answer

Correct Answer: Foreign

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A(n) ____ can be viewed as a sequence of steps that accomplishes a single task.

Answer

Correct Answer: Transaction

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In relational database design, id-dependent entities are used to ________.

Answer

Correct Answer: Represent N:M relationships

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The ____ operator finds rows that do not contain a null value in the specified column.

Answer

Correct Answer: IS NOT NULL

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____ means that an entity has a minimum cardinality of zero.

Answer

Correct Answer: The entity is not required in the relationship

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Sql was developed under the name ____ at the ibm san jose research facilities.

Answer

Correct Answer: SEQUEL

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Oracle 11g is an example of a(n) ____.

Answer

Correct Answer: XML/Hybrid data model

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At tal distributors, there is a ____ relationship between sales reps and customers.

Answer

Correct Answer: One-to-many

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A ____ column is a column that is not part of the primary key.

Answer

Correct Answer: Nonkey

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The imagery of the triumph of death served as a warning against ____.

Answer

Correct Answer: Lust and greed.

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_____ are normally expressed in the form of rules.

Answer

Correct Answer: Constraints

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The maximum number of columns that can be specified for sorting data is ____.

Answer

Correct Answer: 225

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____ attributes can have many values. ____ attributes can have several values.

Answer

Correct Answer: Multivalued.

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The ____ operator is inclusive, meaning that a value equal to either end would be selected.

Answer

Correct Answer: BETWEEN

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The ____ macro action will move the focus to a specific control.

Answer

Correct Answer: GoToControl

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The operators =, <, >, <=, >=, and <> are referred to as ____ operators.

Answer

Correct Answer: Single-row

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In the context of select subquery types, a _____ is returned when an update subquery is used.

Answer

Correct Answer: Virtual table

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A ____ is a query (select statement) inside a query.

Answer

Correct Answer: Subquery

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____ might be represented with a multivalued attribute.

Answer

Correct Answer: A person’s social security number

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A ____ attribute can have only one value.

Answer

Correct Answer: Single valued

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The basic form of the sql select command is ____.

Answer

Correct Answer: SELECT-FROM-WHERE

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The majority of primary memory resources will be allocated to the ____ cache.

Answer

Correct Answer: Data

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____ is a generic entity type that is related to one or more entity subtypes.

Answer

Correct Answer: An entity supertype

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The aggregate function which returns the number of nonnull field values is the ____ function.

Answer

Correct Answer: Count

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If a column alias contains a blank space, it must be enclosed in ____.

Answer

Correct Answer: Double quotation marks

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A transaction is a ____ unit of work that must be either entirely completed or aborted.

Answer

Correct Answer: Logical

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The command to delete a view is ____.

Answer

Correct Answer: DROP VIEW

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You can use the ____ command to create a new table using data in an existing table.

Answer

Correct Answer: CREATE TABLE

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In sql, you use the ____ command to query a database.

Answer

Correct Answer: SELECT

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In oracle, use the ____ command to display the structure of a table.

Answer

Correct Answer: DESCRIBE

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A(n) ____ might be written by a programmer or it might be created through a dbms utility program.

Answer

Correct Answer: Application program

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A ____ read is an added statement that gets the first input value in a program.

Answer

Correct Answer: Priming

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The implicit beginning of a transaction is ____.

Answer

Correct Answer: When the first SQL statement is encountered

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The extended entity relationship model (eerm) is sometimes referred to as the _____.

Answer

Correct Answer: Enhanced entity relationship model

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The special operator used to check whether an attribute value is within a range of values is _____.

Answer

Correct Answer: BETWEEN

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The special operator used to check whether a subquery returns any rows is ____.

Answer

Correct Answer: EXISTS

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To delete rows from the database, use the ____ command.

Answer

Correct Answer: DELETE

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The sdlc phase in which the detailed conceptual data model is created is the ________ phase.

Answer

Correct Answer: Analysis

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Surrogate primary keys are especially helpful when there is no _____ key.

Answer

Correct Answer: Natural

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To change rows for which a specific condition is true, use the ____ command

Answer

Correct Answer: WHERE

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The sql aggregate function that gives the arithmetic mean for a specific column is _____.

Answer

Correct Answer: AVG.

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The syntax for the union query is ____.

Answer

Correct Answer: Query UNION query

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To make changes to existing data in a table, you would use the ____ command.

Answer

Correct Answer: UPDATE

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To concatenate character strings, you use the _____________ operator in a string expression.

Answer

Correct Answer: +

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The ________ states that no primary key attribute may be null.

Answer

Correct Answer: Entity integrity rule

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In some database programs, a data file is referred to as a(n) ______.

Answer

Correct Answer: Table

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In databases information is organized in ________

Answer

Correct Answer: Tables, records, fields

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In database systems, a table is also known as a _____.

Answer

Correct Answer: Record

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In database systems, a _____ defines the data that a table can hold.

Answer

Correct Answer: Field

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In data modeling, a(n) ________ is something that the users want to store data about.

Answer

Correct Answer: Entity

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In a relational database, a row can be referred to as a(n) ____.

Answer

Correct Answer: Tuple

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Changing the database design to improve the performance is called ____.

Answer

Correct Answer: Tuning the design

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Another name for a database server-side extension program is _____.

Answer

Correct Answer: Web-to-database middleware

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A(n) ____ lock will prevent any ddl operations from being performed on the locked table.

Answer

Correct Answer: Exclusive

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A natural key is also called a(n) ____ key.

Answer

Correct Answer: Intelligent

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A file (table) is a collection of related ________.

Answer

Correct Answer: Records

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A database holds related file data in ____ .

Answer

Correct Answer: Tables

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A database _____.

Answer

Correct Answer: Is a collection of integrated and related files

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A database _____________is organized into rows and columns.

Answer

Correct Answer: Table

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A data warehouse ____ data from several databases to provide useful information.

Answer

Correct Answer: Merges

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A data administrator is also known as a(n) _____.

Answer

Correct Answer: Information resource manager

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A _____ relationship exists when three entities are associated.

Answer

Correct Answer: Ternary

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A ____ key is defined as a key that is used strictly for data retrieval purposes.

Answer

Correct Answer: Secondary

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A ____ is a storage structure designed to hold a collection of data.

Answer

Correct Answer: Database

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1nf, 2nf, and 3nf are ____.

Answer

Correct Answer: Normalization stages

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________ is a tool even non-programmers can use to access information from a database.

Answer

Correct Answer: Structured query language

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_____ provide a unified, single point of entry for information distribution.

Answer

Correct Answer: Portals

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____ view provides the most options for defining fields.

Answer

Correct Answer: Table Design

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____ reduces the size of a database and makes the data easier to work with.

Answer

Correct Answer: Normalization

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____ means that an entity has a minimum cardinality of one.

Answer

Correct Answer: The entity is required in the relationship.

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____ keys work with primary keys to properly implement relationships in the relational model.

Answer

Correct Answer: Foreign

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____ is the formal term for combining two or more columns to form a primary key.

Answer

Correct Answer: Concatenation

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____ describes how instances of one entity relate to instances of another entity.

Answer

Correct Answer: Scalability

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____ data exist in the format in which they were collected.

Answer

Correct Answer: Unstructured

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____ data can have only a true or false (yes or no) values.

Answer

Correct Answer: Logical

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____ case tools provide support for the coding and implementation phases.

Answer

Correct Answer: Back-end

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Fields in the query design grid include all of the following except ________.

Answer

Correct Answer: Fields that are listed as Primary Keys

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In _________________________ no row may contain two or more multivalued facts about an entity.

Answer

Correct Answer: 4NF

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The crow's foot symbol with two vertical parallel lines indicates _____ cardinality.

Answer

Correct Answer: (1,1)

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The estimated percentage of unsolicited email of all email is approximately ____ percent.

Answer

Correct Answer: 70

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____ are important because they help to ensure data integrity

Answer

Correct Answer: Constraints

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____ attributes can have many values.

Answer

Correct Answer: Multivalued

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