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WGU C175 Questions & Answers 100% Correct
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What is the name of this relationship? - ANSWER-One-to-many binary relationship "A salesperson is authorized to sell many products, and a product can be sold by many salespersons." What is the name of this relationship? - ANSWER-Many-to-many binary relationship What is the positioning and ...

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  • November 24, 2023
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  • 2023/2024
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  • a salesperson works in one office what is the

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WGU C175 Questions & Answers 100%
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"A salesperson works in one office."

What is the name of this relationship? - ANSWER-One-to-one binary relationship

"A salesperson sells to many customers."

What is the name of this relationship? - ANSWER-One-to-many binary relationship

"A salesperson is authorized to sell many products, and a product can be sold by many
salespersons."

What is the name of this relationship? - ANSWER-Many-to-many binary relationship

What is the positioning and meaning for Cardinality and Modality on an E-R model? -
ANSWER-Cardinality is the outer symbol; represents the maximum.

Modality is the inner symbol; represents the minimum.

"A salesperson works in a minimum of one and a maximum of one office, and an office
may be occupied by or assigned to a minimum of zero and a maximum of one
salesperson." - ANSWER-

"A salesperson may have no customers or many customers." - ANSWER-

Describe the ER model for "Each salesperson is authorized to sell to at least one or
many products, and each product can be sold by at least one or many salespeople." -
ANSWER-

"One salesperson backs-up another salesperson."

What is the name of this model? - ANSWER-One-to-one unary relationship

"A salesperson manages zero to many other salespersons, and a salesperson is
managed by exactly one other salesperson."

What is the name of this model? - ANSWER-One-to-many unary relationship

, "A product can either be part of no other products or be part of several other products,
and a product can either be composed of no other products or be composed of several
other products."

What is the name of this model? - ANSWER-Many-to-many unary relationship

What does 'refer' in Referential Integrity imply? - ANSWER-This revolves around the
circumstance of trying to refer to data in one relation in the database, based on values
in another relation.

Define the delete rule RESTRICT. - ANSWER-If the delete rule between two relations is
RESTRICT and an attempt is made to delete a record on the "one side" of the one-to-
many relationship, the system will forbid the delete to take place if there are any
matching foreign key values in the relation on the "many side".

Define the delete rule CASCADE. - ANSWER-If the delete rule between two relations is
CASCADE and an attempt is made to delete a record on the "one side" of the
relationship, not only will the record be deleted but all of the records on the "many side"
of the relationship that have a matching foreign key value will also be deleted.

In other words, the delete will "cascade" from one relation to the other.

Define the delete rule SET-TO-NULL. - ANSWER-If the delete rule between the two
relations is SET-TO-NULL and an attempt is made to delete a record on the "one side"
of the one-to-many relationship, that record will be deleted and the matching foreign key
values in the records on the "many side" of the relationship will be set to null.

Essentially, it's exactly like the CASCADE delete option, but instead of completely
deleting all possible values, the values are set to NULL instead.

Which entity is uniquely identified by concatenating the primary keys of the two entities
it connects? - ANSWER-Associative Entity

Which type of entity is also called a dependent entity? - ANSWER-Weak Entity

What are the five basic principles of The Database Concept? - ANSWER-1. The
creation of a datacentric environment that is a significant company resource, which can
be shared inside and outside the company.
2. The ability to achieve data integration while storing data in a non-redundant fashion.
3. The ability to store data representing entities involved in multiple relationships w/o
introducing data redundancy.
4. Managing data control issues such as data security, backup and recovery, and
concurrency control.
5. High degree of data independence.

What are the four major DBMS approaches? - ANSWER-- Hierarchical

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