Exam 5: Database Design

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Microsoft Access uses the same pure N:M relationships that occur in data modeling.

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What relationship pattern is illustrated in the following schema? EMPLOYEE (EmployeeID,OfficePhone,Manager) Manager in EMPLOYEE must exist in EmployeeID in EMPLOYEE

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The key of the parent entity becomes part of the key of an ID-dependent entity.

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Which of the following is true when representing a 1:1 binary relationship using the relational model?

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Each attribute of an entity becomes a(n)________ of a table.

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For a 1:1 relationship,the key of each table should be placed in the other table as the foreign key.

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Relationships that are 1:1 do not require referential integrity constraints.

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When transforming an E-R data model into a relational database design,the key of the parent entity should be placed as part of the primary key into the child entity ________.

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To represent a many-to-many relationship in the relational model,a(n)________ table is used.

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Explain the pragmatic reason for using surrogate keys.

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In the relational model,many-to-many relationships cannot be directly represented by relations the way 1:1 and 1:N relationships can.

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Explain the representation of a many-to-many strong entity relationship in a relational database design.

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Microsoft Access does not create N:M relationships because Microsoft Access creates databases based on ________.

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The identifier of the entity becomes the ________ of the corresponding table.

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A surrogate key is appropriate when the primary key of a table contains a lengthy text field.

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By default,when Microsoft Access creates a relationship between two tables it creates a(n)________ relationship.

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As far as Microsoft Access is concerned,there are no:

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What relationship pattern is illustrated in the following schema? PRODUCT (ProductID,Description) SUPPLIER (SupplierID,ContactName,PhoneNumber) PRODUCT_SUPPLIER (ProductID,SupplierID,Cost) ProductID in PRODUCT_SUPPLIER must exist in ProductID in PRODUCT SupplierID in PRODUCT_SUPPLIER must exist in SupplierID in PRODUCT

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Which of the following is not true about surrogate keys?

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How are one-to-one recursive relationships addressed using the relational model?

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