Microsoft MCTS 070-516

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070-516オンライン版は Windows / Mac / Android / iOS 対応です。

Microsoft TS: Accessing Data with Microsoft .NET Framework 4 認定 070-516 試験問題:

1. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server 2008 database. The application contains the following
code segment.
string SQL = string.Format("SELECT * FROM Customer WHERE CompanyName LIKE '%
{0}%', companyName);
var cmd = new SqlCommand(SQL, con);
You need to reduce the vulnerability to SQL injection attacks. Which code segment should you use?

A) string SQL = "SELECT" * FROM Customer @companyName; var cmd = new sqlcommand(SQL,con); cmd.Parameters.AddWithValue("companyName", string.format("where companyName LIKE '%{0}%'", companyName));
B) string SQL = "SELECT * FROM Customer Where " + "CompanyName LIKE @companyName"; var cmd = new SqlCommand(SQL,con); cmd.Parameters.AddWithValue("@companyName", string.Format("%{0}%", companyName));
C) string SQL = "SELECT * FROM Customer Where " + "CompanyName LIKE @companyName"; var cmd = new SqlCommand(SQL,con); var param = new SqlParameter ("@companyName", string.Format("%{0}%", companyName));
D) string SQL = string.Format("SELECT * FROM " + " Customer Where CompanyName LIKE {0}",
new SqlCommand("@companyName", string.format("%{0}%", companyName))); var cmd = new SqlCommand(SQL, con);

2. You use Microsoft .NET Framework 4.0 to develop an application that uses LINQ to SQL. The LINQ to SQL
model contains the Product entity.
A stored procedure named GetActiveProducts performs a query that returns the set of active products from
the database.
You need to invoke the stored procedure to return the active products, and you must ensure that the LINQ
to SQL context can track changes to these entities. What should you do?

A) Navigate to the GetActiveProducts stored procedure in Server Explorer, and drag the procedure onto the Product entity in the LINQ to SQL model designer surface.
B) Select the Product entity, view the entity's property window, and change the Source for the entity to GetActiveProducts.
C) Select the Product entity, view the entity's property window, and change the Name for the entity to GetActiveProducts.
D) Add a property named GetActiveProducts to the Product entity.

3. You use Microsoft .NET Framework 4.0 to develop an application that uses LINQ to SQL.
The Product entity in the LINQ to SQL model contains a field named Productlmage. The Productlmage field
holds a large amount of binary data.
You need to ensure that the Productlmage field is retrieved from the database only when it is needed by the
application. What should you do?

A) When the context is initialized, specify that the Productlmage property should not be retrieved by using DataLoadOptions
B) Set the Auto-Sync property on the Productlmage property of the Product entity to Never.
C) Set the Update Check property on the Productlmage property of the Product entity to Never.
D) Set the Delay Loaded property on the Productlmage property of the Product entity to True.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the Entity Framework.
The application has an entity model that includes SalesTerritory and SalesPerson entities as shown in the
following diagram.

You need to calculate the total bonus for all sales people in each sales territory. Which code segment should you use?

A) from person in model.SalesPersons group person by person.SalesTerritory into territoryByPerson select new {
SalesTerritory = territoryByPerson.Key,
TotalBonus = territoryByPerson.Sum(person => person.Bonus)
};
B) model.SalesPersons .GroupBy(person => person.SalesTerritory) .SelectMany(group => group.Key.SalesPersons) .Sum(person => person.Bonus);
C) model.SalesTerritories .GroupBy(territory => territory.SalesPersons) .SelectMany(group => group.Key) .Sum(person => person.Bonus);
D) from territory in model.SalesTerritories group territory by territory.SalesPerson into personByTerritories select new {
SalesTerritory = personByTerritories.Key,
TotalBonus = personByTerritories.Key.Sum(person => person.Bonus)
};

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses LINQ to SQL.
You create a data model name AdvWorksDataContext, and you add the Product table to the data model.
The Product table contains a decimal column named ListPrice and a string column named Color.
You need to update ListPrice column where the product color is Black or Red. Which code segment should
you use?

A) AdvWorksDataContext dc = new AdvWorksDataContext("..."); var prod = from p in dc.Products
select p;
var list = prod.ToList();
foreach(Product product in list){
if(product.Color == "Black, Red"){
product.ListPrice = product.StandardCost * 1.5M;
}
}
dc.SubmitChanges();
B) AdvWorksDataContext dc = new AdvWorksDataContext("...");
var prod = from p in dc.Products
where p.Color == "Black, Red"
select p;
foreach(var product in prod){
product.ListPrice = product.StandardCost * 1.5M;
}
dc.SubmitChanges();
C) AdvWorksDataContext dc = new AdvWorksDataContext("..."); var prod = from p in dc.Products
select p;
var list = prod.ToList();
foreach(Product product in list){
if((product.Color == "Black) && (product.Color == "Red")){
product.ListPrice = product.StandardCost * 1.5M;
}
}
dc.SubmitChanges();
D) string[] colorList = new string[] {"Black", "Red"}; AdvWorksDataContext dc = new AdvWorksDataContext(); var prod = from p in dc.Products
where colorList.Contains(p.Color)
select p;
foreach(var product in prod){
product.ListPrice = product.StandardCost * 1.5M;
}
dc.SubmitChanges();

質問と回答：