Question 1

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.

Accepted Answer

A) True 
 B)False  False

Question 2

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

Accepted Answer

A)   ref
B)   params
C)   get
D)   out D

Question 3

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

Accepted Answer

A)   CodeIntuit
B)   IntelliSense
C)   MagicMethod
D)   BitDissect B

Question 4

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

Accepted Answer

A)   output
B)   optional
C)   reference
D)   formal

Question 5

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?

Accepted Answer

A)   overloaded
B)   ambiguous
C)   polymorphic
D)   hidden

Question 6

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

Accepted Answer

A)   Only when the method performing the return is a static type method.
B)   Only when the reference is for an array defined within the method's scope.
C)   Only when a method is returning optional parameters with known values as the reference.
D)   Only when it is safe to return, such as returning a reference from a method if the reference was passed into the method.

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A)   comma
B)   dot
C)   colon
D)   semicolon

Question 9

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

Accepted Answer

A)   The parameters must all be placed locally.
B)   The parameters must appear to the right of all mandatory parameters.
C)   The parameters must have constant values.
D)   The parameters must be defined globally.

Question 10

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);
}
}

Accepted Answer

The answer of Given the following program, write the InputMethod()...

Question 11

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

Accepted Answer

The answer of Describe the similarities and differences among method...

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

What type of parameter can be given a default value?

Accepted Answer

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

Question 14

What statement regarding reference parameters is accurate?

Accepted Answer

A)   When you declare a reference parameter in a method header, the argument used to call the method does not require a value.
B)   Reference parameters occupy their own memory locations.
C)   Reference parameters act as aliases, or pseudonyms, for the same memory location occupied by the values passed to them.
D)   The params keyword is used to indicate a reference parameter.

Question 15

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')

Accepted Answer

The answer of Given the following two method signatures, explain...

Question 16

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

Accepted Answer

The answer of What is the difference between a reference...

Question 17

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.

Accepted Answer

The answer of Suppose that you create overloaded method versions...

Question 18

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);
}
}

Accepted Answer

The answer of Write the DisplayStrings() method called in the...

Question 19

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

Accepted Answer

A)   Only as many as there will be arguments.
B)   Only one params keyword is permitted.
C)   Two, provided there is a nested method.
D)   There is no limit to the use of the keyword.

Question 20

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

Accepted Answer

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

Exam 8: Advanced Method Concepts