CIS 305 Chapter 2 Quiz

who can delete data

A good data definition will describe all of the characteristics of a data object EXCEPT: examples. who can delete the data. who determines the value of the data. subtleties.

attribute

A property or characteristic of an entity type that is of interest to the organization is called a(n): coexisting entity. attribute. relationship. cross-function.

unary

A relationship between the instances of a single entity type is called a ________ relationship. ternary primary binary unary

mandatory one

A relationship where the minimum and maximum cardinality are both one is a(n) ________ relationship. optional mandatory link unidirectional mandatory one

time stamp

A value that indicates the date or time of a data value is called a: time stamp. value stamp. checkpoint. check counter.

business rule

A ________ defines or constrains some aspect of the business. business control business structure business rule business constraint

cardinality constraint

A ________ specifies the number of instances of one entity that can be associated with each instance of another entity. counter constraint cardinality constraint degree limit

terms

A fact is an association between two or more: facts. words. terms. nuggets.

identifying relationship

A(n) ________ is the relationship between a weak entity type and its owner. identifying relationship chain link member chain jump path

required attribute

An attribute of an entity that must have a value for each entity instance is a(n): required attribute. fuzzy attribute. optional attribute. composite attribute.

composite

An attribute that can be broken down into smaller parts is called a(n) ________ attribute. associative complex simple composite

derived

An attribute that can be calculated from related attribute values is called a ________ attribute. simple multivalued derived composite

required attribute

An attribute that must have a value for every entity (or relationship) instance is a(n): composite attribute. multivalued attribute. optional attribute. required attribute.

associative entity.

An entity that associates the instances of one or more entity types and contains attributes specific to the relationships is called a(n): build entity. smush entity. associative entity. gateway entity.

as short as possible

An entity type name should be all of the following EXCEPT: concise. as short as possible. a singular noun. specific to the organization.

weak

An entity type whose existence depends on another entity type is called a ________ entity. variant weak strong codependent

managing employees

Business policies and rules govern all of the following EXCEPT: creating data. managing employees. updating data. removing data.

entities.

Customers, cars, and parts are examples of: relationships. attributes. cardinals. entities.

data characteristics are important in the design of programs and other systems components

Data modeling may be the most important part of the systems development process because: data characteristics are important in the design of programs and other systems components. data are less stable than processes. it is the easiest. the data in a system are generally less complex than processes and play a central role in development.

A department can have more than one employee.

For the relationship represented in the figure below, which of the following is true? A department must have at least one employee. A department can have more than one employee. An employee can work in more than one department but does not have to work for any department. An employee has to work for more than one department.

two

In an E-R diagram, there are/is ________ business rule(s) for every relationship. one zero two three

Ternary

In the following diagram, what type of relationship is depicted? Ternary Quad Binary Unary

Each employee can supervise one employee, no employees or many employees.

In the following diagram, which answer is true? Each employee was fired. Each employee can manage many departments. Each employee can supervise one employee, no employees or many employees. Each employee works in more than one department.

a composite attribute.

The following figure shows an example of: a relational attribute. a multivalued attribute. a derived attribute. a composite attribute.

a strong entity and its associated weak entity.

The following figure shows an example of: a double-walled relationship. a strong entity and its associated weak entity. a one-to-many relationship. a co-dependent relationship.

Choose an identifier that doesn't have large composite attributes.

Which of the following criteria should be considered when selecting an identifier? Choose a null identifier. Choose an identifier that is not stable. Choose the most complex identifier possible. Choose an identifier that doesn't have large composite attributes.

Inconsistent

Which of the following is NOT a characteristic of a good business rule? Inconsistent Declarative Expressible Atomic

Relates to a technical characteristic of the system

Which of the following is NOT a good characteristic of a data name? Relates to business characteristics Readable Relates to a technical characteristic of the system Repeatable

Skill

In the figure below, which attribute is multivalued? Skill Years_Employed Address Employee_ID

Each vendor can supply many parts to any number of warehouses, but need not supply any parts.

In the figure shown below, which of the following business rules would apply? VENDOR is not allowed. Each part must be supplied by exactly one vendor to any number of warehouses. Each warehouse can be supplied with any number of parts from more than one vendor, and each warehouse could be supplied with no parts. Each vendor can supply many parts to any number of warehouses, but need not supply any parts.

an entity instance can participate in only one of several alternative relationships.

A mutually exclusive relationship is one in which: an entity instance bridges other XML documents. an entity instance cannot participate in a relationship with another entity instance. an entity instance can participate in only one of several alternative relationships. an entity instance can participate in many different relationships.

attributes.

A person's name, birthday, and social security number are all examples of: entities. descriptors. relationships. attributes.

ternary

A simultaneous relationship among the instances of three entity types is called a ________ relationship. binary ternary primary tertiary

many-to-many

A student can attend five classes, each with a different professor. Each professor has 30 students. The relationship of students to professors is a ________ relationship. one-to-many many-to-many strong one-to-one

Years_Employed

In the figure below, which attribute is derived? Skill Employee_ID Address Years_Employed

A person can marry at most one person.

In the figure shown below, which of the following is true? A person can marry more than one person, but that person can only be married to one person. A person can marry at most one person. A person has to be married. A person can marry more than one person.

It depicts a many-to-many relationship.

In the following diagram, which is true? BOM_STRUCTURE represents a row. Item represents a column. It depicts a ternary relationship. It depicts a many-to-many relationship.

Each patient has one or more patient histories

In the following diagram, which of the answers below is true? Each patient has one or more patient histories. Each patient history belongs to many patients. Each patient history belongs to zero and one patient. Each patient has one and only one visit.

entity-relationship model

The logical representation of an organization's data is called a(n): relationship systems design. database entity diagram. database model. entity-relationship model.

strong entities

The most common types of entities are: smush entities. associative entities. weak entities. strong entities.

one

The number of entity types that participate in a Unary relationship is: zero. one. two. three.

degree

The number of entity types that participate in a relationship is called the: number. identifying characteristic. degree. counter.

derived

The total quiz points for a student for an entire semester is a(n) ________ attribute. stored addressed derived mixed

Strong

Which of the following is an entity that exists independently of other entity types? Strong Variant Weak Codependent