Exam 7: Sub and Function Procedures

Write the code for a function named GetMajor . The function should prompt the user to enter a major field of study and then return the user's response. Then write a statement to invoke the GetMajor function, returning the result to the strCurrentMajor variable.

Which of the following is a valid header for a procedure that is passed the number 9.75?

You can determine whether a variable is being passed by value or by reference by looking at the Call statement.

Usually, the statement that invokes a function will assign the function's return value to a(n) ____.

Math.Round(3.234, 2) returns the number 3.24.

What is a combo box? List the three styles of combo boxes available in Visual Basic.

Problems - Correcting Logic and Code Errors The following sample of code contains errors. Rewrite the incorrect statements to correct all errors. ' calculate and return the miles per gallon Private Function GetMPG(ByVal dblMiles,    ByVal dblGallons) As Double Return dblMPG = dblMiles / dblGallons End Sub ' call the function to calculate miles per gallon ' pass variables for the calculation intMPG = GetMPG()

The syntax of the Call statement is ____.

An independent Sub procedure is a procedure that is independent of any object and event.

Explain the difference between passing data by value and passing data by reference .

The syntax ____ displays a return value.

Like a Sub procedure header, a Function procedure header includes the As dataType section.

You pass a variable ____ when the receiving procedure needs to know the variable's contents, but the receiving procedure does not need to change the contents.

Visual Basic allows you to specify that an argument in the Call statement is optional.

The computer automatically processes an event procedure when the event occurs.

Which of the following is a valid header for a procedure that receives the address of a string variable and the address of an integer?

It is a common practice to begin a procedure's name with a(n) ____.

To sort the items in the list portion of a combo box, you use the combo box's ____ property.

If the digits argument is omitted, the Math.Round function returns a(n) ____.

The expression Math.Round(287.876, 2) yields a value of ____.