You are implementing a read-only page that includes the following controls.
<asp:Button ID="btnRefresh" runat="server" Text="Button" /> <asp:GridView ID="gvCustomers" runat="server" EnableViewState="False" OnDataBinding="gvCustomers_DataBinding"></asp:GridView>
You disable view state to improve performance.
You need to ensure that the page is updated to display the latest data when the user clicks the refresh
button.
Which code segment should you use?

• A. protected void gvCustomers_DataBinding(object sender, EventArgs e)
  {
  gvCustomers.DataSource = GetCustomers();
  gvCustomers.DataBind();
  }
• B. protected void Page_PreInit(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  gvCustomers.DataSource = GetCustomers();
  gvCustomers.DataBind();
  }
  }
• C. protected void Page_Load(object sender, EventArgs e)
  {
  gvCustomers.DataSource = GetCustomers();
  gvCustomers.DataBind();
  }
• D. protected void Page_PreRender(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  gvCustomers.DataSource = GetCustomers();
  gvCustomers.DataBind();
  }
  }

You are implementing an ASP.NET application. You add the following code segment.
public List<Person> GetNonSecretUsers()
{ string[] secretUsers = {"@secretUser", "@admin", "@root"}; List<Person> allpeople = GetAllPeople(); ...
}
You need to add code to return a list of all Person objects except those with a UserId that is contained in the secretUsers list.
The resulting list must not contain duplicates. Which code segment should you use?

• A. return from p in allPeople from u in secretUsers where p.UserId != u select p;
• B. List<Person> people = new List<Person>( from p in allPeople from u in secretUsers where p.UserId != u select p);
  return people.Distinct();
• C. return (from p in allPeople from u in secretUsers where p.UserId != u select p).Distinct();
• D. var secretPeople = (from p in allPeople from u in secretUsers where p.UserId == u select p).Distinct();
  return allPeople.Except(secretPeople);

You are developing an ASP.NET Web application.
The application includes a Icomparer<string> implementation named CaseInsensitiveComparer that
compares strings without case sensitivity
You add the following method.(Line numbers are included for reference only.)
01 public IEnumerable<string>SortWords(string[] words)
02 {
03
04 }
You need to sort the array by word length and then by alphabetic order, ignoring case.
Which code segment should you add at line 03?

• A. return words.Orderby(a =>a.Length).Orderby(a => a,new CaseInSensitiveComparer());
• B. return words.Orderby(a =>a.Length.toString(), new CaseInSensitiveComparer());
• C. return words.Orderby(a => a, new CaseInsensitiveComparer()).ThenBy(a =>a.Length);
• D. return words.Orderby(a =>a.Length).ThenBy(a=> a, new CaseInSensitiveComparer());

You use the ASP.NET Web Application template to create an application in a new Visual Studio solution.
The project uses types that are defined in a class library project.
Source code for the class library is frequently modified.
You need to ensure that classes in the Web application project always reference the most recent version of
the class library types.
What should you do?

• A. Add a post-build step to the class library project that copies the most recent version of the class library assembly to the App_Code folder of the Web application. In the <compilation /> section of the web.config file, add an <assembly /> entry that specifies the location of the class library assembly.
• B. Add a post-build step to the Web application project that copies the most recent version of the class library assembly to the bin folder of the Web application.
• C. Add the class library project to the solution. Modify the Web application project to add a reference to the class library project.
• D. Add the class library project to the solution. Modify the class library project to add a reference to the Web application project.