Visual C# Quiz 4 - Control Structures

What is a control structure in programming?

• A specific action performed only if a certain condition exists

• A set of statements that execute in the order they appear

• A variable that signals when a condition exists

• A logical design that controls the order in which statements execute

Which operator is used to determine if x is greater than or equal to y?

• !=

• >=

• <=

• ==

What is the purpose of a flag in programming?

• To signal when some condition exists in the program

• To prevent data conversion exceptions

• To compare two string variables

• To store true or false values

How can you compare two string variables in C#?

• Using the =? operator

• Using the TryMatch method

• Using the StringMatched event

• Using the == operator

What is the purpose of the TryParse method in C#?

• It attempts to convert a string to its numeric equivalent and throws an exception if the conversion fails.

• It compares two strings with numbers and returns a Boolean value.

• To check if a given string is a palindrome and return a Boolean value.

• To prevent exceptions caused by invalid data

Which logical operator connects multiple Boolean expressions with a logical AND?

• ||

• !

• !=

• &&

What does the switch statement in C# allow you to do?

• Add items to a list box

• Prevent data conversion exceptions

• Evaluate multiple conditions for a final decision

• Determine the order of statement execution

What is the purpose of a radio button in a GUI?

• To display a list of items

• To group items from a list box

• To allow users to select multiple options

• To allow users to select one choice from several possible choices

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

• Using the Items.InsertAt method

• Using the Items.Insert method

• Using the Items.Add method

• Using the AddItem property

What does the CheckedChanged event in C# respond to?

• Changes in the Items property of a list box

• Changes in the Checked property of a radio button or check box

• Changes in the SelectedItem property of a list box

• Changes in the Text property of a list box