Exam 3: Using Methods Classes and Objects

Which of the following is NOT an initial value assigned to an object's data field by a default constructor?

An application's main() method must have a void return type.

Access specifiers are sometimes called access ____________________.

Methods that retrieve values are called ____ methods.

What are the two parts of every method? Describe them.

When creating a method that requires multiple parameters, why would a programmer need to understand a method's signature, and why must a method call match the called method's signature?

You can identify a class that is an application because it contains a public static void main() method.

The interface is the part of a method that the method's client does not see.

A method body provides information about how other methods can interact with it.

Describe what a public access class is and when you would use one. 

Identify and describe the four components that make up the method header above.

When a value is returned from a method, you are required to use the value when the method is called.

A unique identifier is most likely used as a ____ key in a database.

A(n) ____ is a program module that contains a series of statements that carry out a task.

Method names that begin with ____ and set are very typical.

What are the possible results if arguments to a method are passed in the wrong order?

public class Employee { private int empNum; private double empSalary; public void setEmpNum(int emp) { empNum = emp; }  public void setEmpSalary(double sal) { empSalary = sal; } } Given the class defined in the code above, write the Java statements that will create a new employee instance called employee15 and assign an empNum of 15 and empSalary of 500.00 to that employee instance.

____ is a principle of object-oriented programming that describes the encapsulation of method details within a class.

A method's identifier must be more than one word, must have embedded spaces, and can be a Java keyword.