70-505CSharp Exam

1. You are creating a Windows Forms application by using the .NET Framework 3.5.
The application requires a form to display a clock.
You need to create a circular form to display the clock.
Which code segment should you use?
A. this.FormBorderStyle =
System.Windows.Forms.FormBorderStyle.None;
System.Drawing.Drawing2D.GraphicsPath path = new
System.Drawing.Drawing2D.GraphicsPath();
path.AddEllipse(0, 0, this.Width, this.Height);
Region reg = new Region();
this.Region = reg;
B. this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
System.Drawing.Drawing2D.GraphicsPath path = new
System.Drawing.Drawing2D.GraphicsPath();
path.AddEllipse(0, 0, this.Width, this.Height);
Region reg = new Region(path);
this.Region = reg;
C. this.FormBorderStyle =
System.Windows.Forms.FormBorderStyle.None;
System.Drawing.Drawing2D.GraphicsPath path = new
System.Drawing.Drawing2D.GraphicsPath();
path.AddEllipse(0, 0, this.Width, this.Height);
Region reg = new Region(path);
this.Region = reg;
D. this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
System.Drawing.Drawing2D.GraphicsPath path = new
System.Drawing.Drawing2D.GraphicsPath();
path.AddEllipse(0, 0, this.Width, this.Height);
Region reg = new Region();
this.Region = reg;
Answer: C
2. You are creating a Windows Forms application by using the .NET Framework 3.5.
You create a new form in your application. You add a SplitContainer control named spcFrame to the form. The SplitContainer control has two SplitterPanel controls named Panel1 and Panel2.
You are configuring the SplitContainer control to define the layout of the form.
You need to ensure that the following requirements are met:
The initial distance from the left edge of the spcFrame splitter is set to 200 pixels.
The size of the Panel2 SplitterPanel remains unchanged when the form is resized.
Which code segment should you use?
A. spcFrame.Panel1MinSize = 200;
spcFrame.FixedPanel = FixedPanel.Panel1;
B. spcFrame.IsSplitterFixed = true;
spcFrame.SplitterWidth = 200;
C. spcFrame.SplitterDistance = 200;
spcFrame.FixedPanel = FixedPanel.Panel2;
D. spcFrame.Panel2MinSize = 0;
spcFrame.SplitterIncrement = 200;
Answer: C
3. You are creating a Windows Forms application by using the .NET Framework 3.5.
You create a new form in the application. You add a ContextMenuStrip control named ctxMenu to the form. You have a user-defined class named CustomControl.
You write the following code segment in the application. (Line numbers are included for reference only.)
01 CustomControl myControl = new CustomControl();
02
You need to ensure that an instance of CustomControl is displayed on the form as a top-level item of the ctxMenu control.
Which code segment should you add at line 02?
A. ToolStripControlHost host = new ToolStripControlHost(myControl);
ctxMenu.Items.Add(host);
B. ToolStripPanel panel = new ToolStripPanel();
panel.Controls.Add(myControl);
ctxMenu.Controls.Add(panel);
C. ToolStripContentPanel panel = new ToolStripContentPanel();
panel.Controls.Add(myControl);
ctxMenu.Controls.Add(panel);
D. ToolStripMenuItem menuItem = new ToolStripMenuItem();
ToolStripControlHost host = new ToolStripControlHost(myControl);
menuItem.DropDownItems.Add(host);
ctxMenu.Items.Add(menuItem);
Answer: A
4. You are creating a Windows Forms application by using the .NET Framework 3.5.
You create a new form in your application. You add a PrintDocument control named pntDoc to the form.
To support the print functionality, you write the following code segment in the application. (Line numbers are included for reference only.)
01 pntDoc.BeginPrint +=
new PrintEventHandler(PrintDoc_BeginPrint);
02 ...
03 bool canPrint = CheckPrintAccessControl();
04 if (!canPrint) {
05
06 }
07
You need to ensure that the following requirements are met:
When the user has no print access, font and file stream initializations are not executed and the print operation is cancelled.
Print operations are logged whether or not the user has print access.
What should you do?
A. Add the following code segment at line 05.
pntDoc.BeginPrint -= new PrintEventHandler(PrintDoc_BeginPrint);
pntDoc.BeginPrint +=
new PrintEventHandler((obj, args) => args.Cancel = true);
Add the following code segment at line 07.
pntDoc.BeginPrint +=
new PrintEventHandler((obj1, args1) => LogPrintOperation());
B. Add the following code segment at line 05.
pntDoc.BeginPrint +=
new PrintEventHandler(delegate(object obj, PrintEventArgs args){});
Add the following code segment at line 07.
pntDoc.BeginPrint -= new PrintEventHandler(PrintDoc_BeginPrint);
pntDoc.BeginPrint +=
new PrintEventHandler((obj1, args1) => LogPrintOperation());
C. Add the following code segment at line 05.
pntDoc.BeginPrint -= new PrintEventHandler(PrintDoc_BeginPrint);
pntDoc.BeginPrint -=
new PrintEventHandler(delegate(object obj, PrintEventArgs args){});
Add the following code segment at line 07.
pntDoc.BeginPrint -=
new PrintEventHandler((obj1, args1) => LogPrintOperation());
D. Add the following code segment at line 05.
pntDoc.BeginPrint -=
new PrintEventHandler((obj, args) => args.Cancel = true);
Add the following code segment at line 07.
pntDoc.BeginPrint += new PrintEventHandler(PrintDoc_BeginPrint);
pntDoc.BeginPrint -=
new PrintEventHandler((obj1, args1) => LogPrintOperation());
Answer: A
5. You are creating a Windows Forms application by using the .NET Framework 3.5.
You plan to modify a list of orders within a DataGridView control in the application.
You need to ensure that a value is required in the first column of the grid control.
Which code segment should you use?
A. private void dataGridOrders_CellValidated(
object sender, DataGridViewCellEventArgs e) {
if (e.ColumnIndex == 0) {
var cellValue = dataGridOrders[
e.ColumnIndex, e.RowIndex].Value;
if (cellValue == null ||
string.IsNullOrEmpty(cellValue.ToString()))
{
dataGridOrders.EndEdit();
}
}
}
B. private void dataGridOrders_Validated(
object sender, EventArgs e) {
if (dataGridOrders.CurrentCell.ColumnIndex == 0) {
var cellValue = dataGridOrders.Text;
if (cellValue == null ||
string.IsNullOrEmpty(cellValue.ToString()))
{
dataGridOrders.EndEdit();
}
}
}
C. private void dataGridOrders_Validating(
object sender, CancelEventArgs e) {
if (dataGridOrders.CurrentCell.ColumnIndex == 0) {
var cellValue = dataGridOrders.Text;
if (cellValue == null ||
string.IsNullOrEmpty(cellValue.ToString()))
{
e.Cancel = true;
}
}
}
D. private void dataGridOrders_CellValidating(
object sender, DataGridViewCellValidatingEventArgs e) {
if (e.ColumnIndex == 0) {
if (e.FormattedValue == null ||
string.IsNullOrEmpty(e.FormattedValue.ToString()))
{
e.Cancel = true;
}
}
}
Answer: D
6. You are creating a Windows Forms application by using the .NET Framework 3.5.
You write the following code segment to bind a list of categories to a drop-down list. (Line numbers are included for reference only.)
01 OleDbConnection cnnNorthwind =
new OleDbConnection(connectionString);
02 OleDbCommand cmdCategory = new OleDbCommand(
"SELECT CategoryID, CategoryName FROM Categories ORDER BY
CategoryName", cnnNorthwind);
03 OleDbDataAdapter daCategory = new
OleDbDataAdapter(cmdCategory);
04 DataSet dsCategory = new DataSet();
05 daCategory.Fill(dsCategory);
06
You need to ensure that the drop-down list meets the following requirements:
Displays all category names.
Uses the category ID as the selected item value.
Which code segment should you add at line 06?
A. ddlCategory.DataSource = dsCategory;
ddlCategory.DisplayMember = "CategoryName";
ddlCategory.ValueMember = "CategoryID";
B. ddlCategory.DataSource = dsCategory.Tables[0];
ddlCategory.DisplayMember = "CategoryName";
ddlCategory.ValueMember = "CategoryID";
C. ddlCategory.DataBindings.Add("DisplayMember",
dsCategory, "CategoryName");
ddlCategory.DataBindings.Add("ValueMember",
dsCategory, "CategoryID");
D. ddlCategory.DataBindings.Add("DisplayMember",
dsCategory.Tables[0], "CategoryName");
ddlCategory.DataBindings.Add("ValueMember",
dsCategory.Tables[0], "CategoryID");
Answer: B
7. You are creating a Windows Forms application by using the .NET Framework 3.5.
You write a code segment to connect to a Microsoft Access database and populate a DataSet.
You need to ensure that the application meets the following requirements:
It displays all database exceptions.
It logs all other exceptions by using the LogExceptionToFile.
Which code segment should you use?
A. try
{
categoryDataAdapter.Fill(dsCategory);
}
catch (SqlException ex)
{
MessageBox.Show(ex.Message, "Exception");
LogExceptionToFile(ex.Message);
}
B. try
{
categoryDataAdapter.Fill(dsCategory);
}
catch (SqlException ex)
{
MessageBox.Show(ex.Message, "Exception");
}
catch (Exception ex)
{
LogExceptionToFile(ex.Message);
}
C. try
{
categoryDataAdapter.Fill(dsCategory);
}
catch (OleDbException ex)
{
MessageBox.Show(ex.Message, "Exception");
}
catch (Exception ex)
{
LogExceptionToFile(ex.Message);
}
D. try
{
categoryDataAdapter.Fill(dsCategory);
}
catch (OleDbException ex)
{
MessageBox.Show(ex.Message, "Exception");
LogExceptionToFile(ex.Message);
}
Answer: C
8. You are creating a Windows Forms application by using the .NET Framework 3.5.
You need to populate a list box control along with category names by using a DataReader control.
Which code segment should you use?
A. OleDbDataReader reader;
OleDbConnection cnnNorthwind = new OleDbConnection(
connectionString);
cnnNorthwind.Open();
OleDbCommand cmdCategory = new OleDbCommand(
"SELECT * FROM Categories", cnnNorthwind);
reader = cmdCategory.ExecuteReader();
while (reader.Read()) {
lbCategories.Items.Add(reader["CategoryName"]);
}
cnnNorthwind.close();
B. OleDbDataReader reader;
OleDbConnection cnnNorthwind = new OleDbConnection(
connectionString);
cnnNorthwind.Open();
OleDbCommand cmdCategory = new OleDbCommand(
"SELECT * FROM Orders", cnnNorthwind);
reader = cmdCategory.ExecuteReader();
while (reader.NextResult()) {
lbCategories.Items.Add(reader["CategoryName"]);
}
cnnNorthwind.close();
C. OleDbDataReader reader;
OleDbConnection cnnNorthwind = new OleDbConnection(
connectionString);
cnnNorthwind.Open();
OleDbCommand cmdCategory = new OleDbCommand(
"SELECT * FROM Orders", cnnNorthwind);
reader = cmdCategory.ExecuteReader();
cnnNorthwind.Close();
while (reader.Read()) {
lbCategories.Items.Add(reader["CategoryName"]);
}
cnnNorthwind.close();
D. OleDbDataReader reader;
using (OleDbConnection cnnNorthwind = new OleDbConnection(
connectionString)) {
cnnNorthwind.Open();
OleDbCommand cmdCategory = new OleDbCommand(
"SELECT * FROM Orders", cnnNorthwind);
reader = cmdCategory.ExecuteReader();
}
while (reader.Read()) {
lbCategories.Items.Add(reader["CategoryName"]);
}
cnnNorthwind.close();
Answer: A
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