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Inside Collection (Course): Object-Oriented Programming (OOP) with Java
Summary: This module contains review questions and answers keyed to the module titled Jb0130: Java OOP: A Gentle Introduction to Methods in Java
This module contains review questions and answers keyed to the module titled Jb0130: Java OOP: A Gentle Introduction to Methods in Java .
The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.
True or false? Methods are often called functions, procedures, subroutines, and various other names.
True or false? A Java method can be thought of as a separate program module that has the ability to do something useful. Having written the method, you can make it available for use as a helper to your main program each time your main program needs to have that useful thing done.
True or false? In Java, you must write all of the methods that you need.
True or false? In the following statement, sqRtPeas is the name of a method.
System.out.println(sqRtPeas);
True or false? Java only allows you to use the pre-written methods in the class libraries.
Normally, when designing and writing a method such as one that can calculate the square root of a number, it is desirable to write it in such a way that it can calculate the square root of any number (as opposed to only one specific number) . How is that accomplished?
True or false? According to common programming jargon, the process of causing a method to be executed is commonly referred to as setting the method.
True or false? This process of providing information to a method when you call it is commonly referred to as sending a message to the method.
True or false? When called, a method will usually
True or false? A value of type double can be (almost) any numeric value, positive or negative, with or without a decimal part.
True or false? Java is not a case-sensitive programming language.
True or false? The following two rules will generally suffice to keep you out of trouble when defining variable and method names in Java:
True or false? In Java, the assignment operator is the % character.
True or false? The behavior of the sqrt method is to calculate and display the square root of the value passed to it as a parameter.
True or false? The syntax for passing parameters to a method consists of following the name of the method with a pair of matching parentheses that contain the parameter or parameters. If more than one parameter is being passed, they are all included within the parentheses and separated by commas. The order of the parameters is not important.
What is the meaning of the following two images?
This image was inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at the same time.
The image is also an example of the kinds of things that we do in my course titled ITSE 2321, Object-Oriented Programming.
This image was also inserted for the purpose of inserting space between the questions and the answers.
False. Normally the order in which parameters are passed to a method is very important.
False. The behavior of the sqrt method is to calculate and return the square root of the value passed to it as a parameter.
False. In Java, the assignment operator is the = character.
True.
False. Just like C, C++, and C#, Java is very much a case-sensitive programming language.
True.
True.
False. If you continue in this field of study, you will learn that we send messages to objects by calling methods that belong to the objects. The process of providing information to a method when you call it is commonly referred to as passing parameters to the method.
False. The process of causing a method to be executed is commonly referred to as calling or possibly invoking the method.
That is accomplished through the use of something called method parameters .
False. In addition to the standard methods that are already available, if you need a method to perform some function and there is no standard method already available to perform that function, you can write your own method.
False. In the following statement, println is the name of a method. sqRtPeas is the name of a variable whose contents are being passed as a parameter to the println method.
System.out.println(sqRtPeas);
False. The Java programming environment contains a large number of methods (in the class libraries) that are already available for you to use when you need them.
True.
True.
This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download a PDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should be aware that some of the HTML elements in this module may not translate well into PDF.
I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made and published without my prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
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This work is licensed by Richard Baldwin under a Creative Commons Attribution License (CC-BY 3.0), and is an Open Educational Resource.
Last edited by Richard Baldwin on Jan 6, 2013 9:55 am -0600.
