AP Java Ch. 4 Review

Question 1  Java methods can return only primitive types (int, double, boolean, etc).

Question 2  All Java classes must contain a main method which is the first method executed when the Java class is called upon.

Question 3  Java methods can return more than one item if they are modified with the reserved word continue, as in public continue int foo( ) { … }

Question 4  The following method header definition will result in a syntax error: public void aMethod( );

Question 5  A method defined in a class can access the class’ instance data without needing to pass them as parameters or declare them as local variables.

Question 6  The interface of a class is based on those data instances and methods that are declared public.

Question 7  Defining formal parameters requires including each parameters type.

Question 8  Every class definition must include a constructor.

Question 9  While multiple objects of the same class can exist, there is only one version of the class.

Question 10  A constructor must always return an int.

Question 11  A class’s instance data are the variables declared in the main method.

Question 12  The return statement must be followed a single variable that contains the value to be returned.

Question 13  A method defined without a return statement will cause a compile error.

Question 14  The println method on System.out is overloaded.

Question 15  Method decomposition is the process of creating overloaded versions of a method that do the same thing, but operate on different data types.

Question 16  An object may be made up of other objects.

Question 17  In a method with both a precondition and a postcondition, the postcondition should be true when the method finishes executing regardless of whether the precondition was true.

Question 18  An accessor method provides access to a value and allows the caller to change that value.