Modularizing Your Code With Methods Chapter 6 Test Bank

Starting Out with Visual C#, 5e (Tony Gaddis)

Chapter 6 Modularizing Your Code with Methods

TRUE/FALSE

1. In a general sense, a class is a collection of statements that performs a specific task.

2. If a specific task is performed in several places in a program, a method can be written once to perform that task and then be executed any time it is needed.

3. Every method must have a nonempty parameter list.

4. A method definition has two parts: a header and a body.

5. When the keyword void appears in the method header, it means the method will return a value.

6. When a method is declared with the private access modifier, it can be called only by code inside the same class as the method.

7. In a method header, the name is always followed by a set of parentheses.

8. The method header is always terminated with a semicolon.

9. When a method is called the program branches to that method and executes the statements in the method body.

10. A mathematical expression, such as A * B, cannot be passed as an argument to a method containing a value parameter.

11. A mathematical expression, such as A * B, cannot be passed as an argument to a method containing a reference parameter.

12. You can pass string literals as arguments to methods containing string parameters.

13. You can pass int arguments into int parameters but you cannot pass double or decimal arguments into int parameters.

14. When calling a method and passing a variable as an argument, always write the data type and the variable name of the argument variable in the method call.

15. A parameter variable can be accessed by any statement outside the method in which the parameter variable is declared.

16. You have to write the data type for each parameter variable in a parameter list.

17. Default arguments must be literals or constants.

18. If you provide a default argument for the first parameter in a list, you do not need to provide default arguments for the remaining parameters.

19. Passing an argument by reference guarantees that the argument will not be changed by the method it is passed into.

20. If you call a method that has a reference parameter, you must also write the keyword ref before the argument.

21. When you pass an argument to a ref parameter, that argument must already be set to some value.

22. When you call a method that has an output parameter, you must also write the keyword out before the argument.

23. The debugger's Step Over command lets you view all statements inside a method being called by the current program statement.

24. Suppose you set a breakpoint inside a method named X. When you reach a statement that calls method X the Step Over command will stop at the breakpoint.

25. Suppose you're using the debugger to step through a method and you want to immediately return to the place in the program where the method was called. The Step Return command will accomplish this.

26. The debugger's Step Into command lets you view all statements inside a method being called by the current program statement.

27. A method that has an output parameter must set the output parameter to some value before it finishes executing.

28. When you call a method that has an output parameter, you do not need to assign an initial value to the argument variable.

29. void methods are useful for simplifying complex conditions that are tested in decision and repetition structures.

30. You can write methods that return any data type.

MULTIPLE CHOICE

1. Dividing a large problem into several smaller programs that are each easily solved is sometimes called __________.

2. In general terms, a program that is broken into smaller units of code, such as methods, is known as a __________.

3. The benefit from dividing code into methods known as __________ is gained as follows: After you write code to perform a task once, you can use the code again every time your program needs to perform that same task.

4. When you call a __________ method, it executes its code and returns without passing any value back to the program statement that called it.

5. When you call a __________ method, it executes the statements it contains and then returns a value back to the program statement that called it.

6. The __________ which appears at the beginning of a method definition lists several important things about the method. These include the method's name and a list of parameters.

7. The __________ is a collection of statements that are performed when a method is executed.

8. It is a standard convention among C# programmers to use __________ for method names because it differentiates method names from variable and field names.

9. Which of the following statements correctly calls a method named ShowName?

10. The memory address that is saved by the system when a method is called and is the location to which the system should return after a method ends is known as the __________.

11. Data values passed to a method when it is called are known as __________.

12. A(n) __________ is a variable that receives an argument which is passed into a method.

13. When you pass an argument to a method, the argument's data type must be __________ with the receiving parameter's data type.

14. A parameter variable's scope is the __________ in which the parameter variable is declared.

15. When a method contains multiple parameters, they are often referred to collectively as a(n) __________.

16. A method containing a(n) __________ allows you to specify which parameter variable the argument should be passed to.

17. When a __________ is provided for a parameter, it is possible to call the method without explicitly passing an argument into the parameter.

18. When an argument is __________, only a copy of the argument's value is passed into the parameter variable.

19. When you want a method to be able to change the value of a variable that is passed to it as an argument, the variable must be __________.

20. __________ are useful for returning more than one value from a method.

21. A(n) __________ works like a reference parameter, but the argument does not have to be set to a value before it is passed into the parameter.

22. In C# you declare a reference parameter by writing the __________ keyword before the parameter variable's data type.

23. In C# you declare an output parameter by writing the __________ keyword before the parameter variable's data type.

24. When a __________ method finishes, it returns a value to the statement that called it.

25. A value-returning statement must have a(n) __________ statement.

26. In a value-returning method the type of data the method returns is commonly called the method's __________.

27. You can use a(n) __________ to test a conditional expression and return either true or false.

28. Which of the following is the best type of tool to use to break up input validation into separate steps?

29. When using the debugger, which command lets you execute a method call without seeing the individual statements within the method?

30. When using the debugger, which command lets you follow a method call into the statements in the method's source code?

31. When using the debugger, which command lets you immediately execute all remaining statements inside the current method and return to the method's caller?

32. Which of the following data types can be returned from a method?