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Exam 8: Advanced Method Concepts

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Question 1

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What should you utilize when you don't know how many arguments you might eventually send to a method?

A) value parameter
B) parameter array
C) reference parameter
D) output parameter

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Question 2

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Write the DisplayStrings() method called in the code below using a parameter array declared in the method header.The method should write its arguments in a single line, followed by a newline.What will the output be after running Main()? using static System.Console; class ParamsDemo { static void Main() { string[] names = {"Mark", "Paulette", "Carol"}; DisplayStrings("Ginger"); DisplayStrings("George", "Maria", "Thomas"); DisplayStrings(names); } }

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The DisplayStrings() method should be si...

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Question 3

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What is the difference between a reference parameter and an output parameter?

You cannot use the out or ref keywords when passing an array to a method.

Suppose that you create overloaded method versions with the following declarations: private static void MyMethod(double d) private static void MyMethod(float f) Would MyMethod() run if it is called with an integer argument? Describe how C# determines which, if either, method should run when MyMethod() is called.

Given the following two method signatures, explain the reasoning behind how the C# compiler determines which method version to invoke for the call MyMethod(12): private static void MyMethod(int a) private static void MyMethod(int a, char b = 'B')

To ensure that the original value of an argument passed to a method remains unchanged after returning from the method, you should use a reference parameter or an output parameter.

What type of parameter requires that the argument used to call the method must have an assigned value?

What is a method considered to be when there is a potential for a situation in which the compiler cannot determine what method to use?

When adding optional parameters in a parameter list, what is a valid requirement?

What type of parameter can be given a default value?

Under what circumstances can you return a reference from a method?

Given the following program, write the InputMethod() method.It should read two values from the user and assign them to the int variables first and second, which are then printed out in the code shown below. using static System.Console; class InputMethodDemo { static void Main() { int first, second; InputMethod(out first, out second); WriteLine("After InputMethod first is {0}", first); WriteLine("and second is {0}", second); } }

A method can return at most one value to a method that calls it.

When naming an argument in a method call using its parameter name, what must come before the value?

Describe the similarities and differences among method versions when the method is overloaded.

When declaring a method, how any params keywords are permitted?

What statement regarding reference parameters is accurate?

What Visual Studio IDE feature can be used to discover information about methods you are using?

What modifier is used to indicate that a parameter is used for output?