C# - Module 3 Quiz

What is the purpose of a ComboBox in C#?

• To display a text box combined with a ListBox

• To create objects on a form with mouse clicks

• To remove items from a list

• To clear the entire list

How can you add an item to a ComboBox in C#?

• comboBox1.Items.Add('Wednesday')

• comboBox1.Items.Add('Friday')

• comboBox1.Items.Add('Saturday')

• comboBox1.Items.Add('Sunday')

How can you retrieve the displayed item from a ComboBox in C#?

• var = comboBox1.SelectedItem;

• var = comboBox1.Text;

• var = comboBox1.SelectedText;

• var = comboBox1.SelectedValue;

How can you remove an item from a ComboBox at a specified index in C#?

• comboBox1.Items.RemoveAt(0);

• comboBox1.Items.RemoveAt(2);

• comboBox1.Items.RemoveAt(1);

• comboBox1.Items.RemoveAt(3);

What does the DropDownStyle property specify in a ComboBox in C#?

• Whether the list is displayed in a drop-down

• Whether the list is always displayed

• Whether the text portion can be edited

• All of the above

How can you set the selected item in a ComboBox to 'test3' in C#?

• comboBox1.SelectedItem = 'test3';

• comboBox1.SelectedItem = 'test2';

• comboBox1.SelectedItem = 'test4';

• comboBox1.SelectedItem = 'test1';

How can you make a ComboBox read-only in C#?

• comboBox1.Enabled = false;

• comboBox1.ReadOnly = true;

• comboBox1.Enabled = true;

• comboBox1.ReadOnly = false;

What method can be used to remove the item 'Friday' from a ComboBox in C#?

• comboBox1.Items.Remove('Monday');

• comboBox1.Items.Remove('Wednesday');

• comboBox1.Items.Remove('Friday');

• comboBox1.Items.Remove('Sunday');

How can you add an item 'test2' to a ComboBox in C#?

• comboBox1.Items.Add('test2');

• comboBox1.Items.Add('test3');

• comboBox1.Items.Add('test1');

• comboBox1.Items.Add('test4');

How can you remove the second item from a ComboBox in C#?

• comboBox1.Items.RemoveAt(2);

• comboBox1.Items.RemoveAt(1);

• comboBox1.Items.RemoveAt(3);

• comboBox1.Items.RemoveAt(0);