###BeginCaseStudy###
Case Study: 1
Background
You are updating an existing Microsoft .NET Framework 4 application that includes a data
layer built with ADO.NET Entity Framework 4. The application communicates with a
Microsoft SQL Server 2008 instance named INST01 on a server named SQL01. The
application stores data in a database named Contoso in the INST01 instance.
You need to update the existing technology and develop new functionality by using
Microsoft Visual Studio 2010.
Application and Data Structure

The application tracks bicycle parts as they pass through a factory. Parts are represented by
the abstract Part entity and its associated partial classes. Each part has a name stored in the
Name field and a unique identifier stored in the Id field.
Parts are either components (represented by the Component class) such as chains, wheels,
and frames, or finished products (represented by the Product class) such as completed
bicycles. The Component class and the Product class derive from the Part class and may
contain additional class-specific properties.
Parts may have a color (represented by the Color class), but not all parts have a color. Parts
may be composed of other parts, and those parts may in turn be composed of other parts; any
part represents a tree of the parts that are used to build it. The lowest level of the tree consists
of components that do not contain other components.
A product is a part that has been completed and is ready to leave the factory. A product
typically consists of many components (forming a tree of child parts) but can also be
constructed by combining other products and/or components to form a bundled product, such
as a bicycle and a helmet that are sold together.
Components and products are stored in a database table named Parts by using a table-perhierarchy (TPH) mapping. Components have a null ProductType field and a non-null
PartType field. Products have a non-null ProductType field and a null PartType field.
The following diagram illustrates the complete Entity data model diagram (EDMX diagram).

The following graphic illustrates details of the Part-Color Association.

The following code segments show relevant portions of the files referenced by the case study
items. (Line numbers in the samples below are included for reference only and include a twocharacter prefix that denotes the specific file to which they belong.)
Extension Method.cs

Model.edmx

Model/Color.cs

Model/component.cs

Model ContosoEntities.cs

Model IName.cs

Model Part.cs

Model/Product.cs

SP_FindObsolete

###EndCaseStudy###

The application must provide a component part list for any product. The component part list must
give the quantity of each distinct part that is required to manufacture that product. You need to
create a LINQ expression that delivers a result of type IEnumerable<Tuple<int, Part>> to meet the
requirements. Which expression should you use?

###BeginCaseStudy###
Case Study: 1
Background
You are updating an existing Microsoft .NET Framework 4 application that includes a data
layer built with ADO.NET Entity Framework 4. The application communicates with a
Microsoft SQL Server 2008 instance named INST01 on a server named SQL01. The
application stores data in a database named Contoso in the INST01 instance.
You need to update the existing technology and develop new functionality by using
Microsoft Visual Studio 2010.
Application and Data Structure

The application tracks bicycle parts as they pass through a factory. Parts are represented by
the abstract Part entity and its associated partial classes. Each part has a name stored in the
Name field and a unique identifier stored in the Id field.
Parts are either components (represented by the Component class) such as chains, wheels,
and frames, or finished products (represented by the Product class) such as completed
bicycles. The Component class and the Product class derive from the Part class and may
contain additional class-specific properties.
Parts may have a color (represented by the Color class), but not all parts have a color. Parts
may be composed of other parts, and those parts may in turn be composed of other parts; any
part represents a tree of the parts that are used to build it. The lowest level of the tree consists
of components that do not contain other components.
A product is a part that has been completed and is ready to leave the factory. A product
typically consists of many components (forming a tree of child parts) but can also be
constructed by combining other products and/or components to form a bundled product, such
as a bicycle and a helmet that are sold together.
Components and products are stored in a database table named Parts by using a table-perhierarchy (TPH) mapping. Components have a null ProductType field and a non-null
PartType field. Products have a non-null ProductType field and a null PartType field.
The following diagram illustrates the complete Entity data model diagram (EDMX diagram).

The following graphic illustrates details of the Part-Color Association.

The following code segments show relevant portions of the files referenced by the case study
items. (Line numbers in the samples below are included for reference only and include a twocharacter prefix that denotes the specific file to which they belong.)
Extension Method.cs

Model.edmx

Model/Color.cs

Model/component.cs

Model ContosoEntities.cs

Model IName.cs

Model Part.cs

Model/Product.cs

SP_FindObsolete

###EndCaseStudy###

You need to write a LINQ query that can be used against a ContosoEntities context object named
context to find all parts that have a duplicate name. Which of the following queries should you use?
(Each correct answer presents a complete solution. Choose two.)

###BeginCaseStudy###
Case Study: 1
Background
You are updating an existing Microsoft .NET Framework 4 application that includes a data
layer built with ADO.NET Entity Framework 4. The application communicates with a
Microsoft SQL Server 2008 instance named INST01 on a server named SQL01. The
application stores data in a database named Contoso in the INST01 instance.
You need to update the existing technology and develop new functionality by using
Microsoft Visual Studio 2010.
Application and Data Structure

The application tracks bicycle parts as they pass through a factory. Parts are represented by
the abstract Part entity and its associated partial classes. Each part has a name stored in the
Name field and a unique identifier stored in the Id field.
Parts are either components (represented by the Component class) such as chains, wheels,
and frames, or finished products (represented by the Product class) such as completed
bicycles. The Component class and the Product class derive from the Part class and may
contain additional class-specific properties.
Parts may have a color (represented by the Color class), but not all parts have a color. Parts
may be composed of other parts, and those parts may in turn be composed of other parts; any
part represents a tree of the parts that are used to build it. The lowest level of the tree consists
of components that do not contain other components.
A product is a part that has been completed and is ready to leave the factory. A product
typically consists of many components (forming a tree of child parts) but can also be
constructed by combining other products and/or components to form a bundled product, such
as a bicycle and a helmet that are sold together.
Components and products are stored in a database table named Parts by using a table-perhierarchy (TPH) mapping. Components have a null ProductType field and a non-null
PartType field. Products have a non-null ProductType field and a null PartType field.
The following diagram illustrates the complete Entity data model diagram (EDMX diagram).

The following graphic illustrates details of the Part-Color Association.

The following code segments show relevant portions of the files referenced by the case study
items. (Line numbers in the samples below are included for reference only and include a twocharacter prefix that denotes the specific file to which they belong.)
Extension Method.cs

Model.edmx

Model/Color.cs

Model/component.cs

Model ContosoEntities.cs

Model IName.cs

Model Part.cs

Model/Product.cs

SP_FindObsolete

###EndCaseStudy###

The application UI displays a list of products in alphabetical order. To display each product, the UI
requires the va of the product Id field and the product Name field. You need to write a LINO query
that returns the product name and unique identifier without retrieving any other database columns.
The query must create an anonymous type with a field named ProductName that contains the
product name and a field named Id that contains the unique identifier. Which query expression
should you write?

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to develop an application.
You use the ADO.NET Entity Framework Designer to model entities. The application includes selftracking entities as shown in the following diagram.

There is a Person entity named person1 that has Track Changes turned on.
You need to delete all e-mail addresses that are associated with person1 by using an ObjectContext
named context. What are two possible code segments that you can use to achieve this goal? (Each
correct answer presents a complete solution. Choose two).