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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 Jb0150: Java OOP: A Gentle Introduction to Java Data Types.
This module contains review questions and answers keyed to the module titled Jb0150: Java OOP: A Gentle Introduction to Java Data Types .
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? Java is a type-sensitive language.
True or false? Data type double involves whole numbers only (no fractional parts are allowed) .
True or false? Type double involves numbers with fractional parts.
True or false? All Java data types conceptually have something to do with numeric values.
True or false? The Java char type deals conceptually with the letters of the alphabet, the numeric characters, and the punctuation characters.
True or false? For every different type of data used with a particular programming language, there is a specification somewhere that defines two important characteristics of the type:
True or false? If you have an instance of the byte type, the set of all possible values that you can store in that instance is the set of all the whole numbers ranging from -256 to +255.
Name or describe four of the operations that you can perform with data of type short .
True or false? Java data types can be subdivided into two major categories:
True or false? The primitive types are not part of the core language.
True or false? For purposes of discussion, primitive types can be subdivided into four categories:
True or false? The whole-number types differ in terms of the range of values that they can accommodate and the amount of computer memory required to store instances of the types.
True or false? Java provides an unsigned version of all of the primitive whole-number types.
True or false? Floating point types represent values as a mantissa containing a decimal point along with an exponent value that tells how many places to shift the decimal point to the left or to the right in order to determine the true value.
True or false? With a floating point type, positive exponent values mean that the decimal point should be shifted to the left. Negative exponent values mean that the decimal point should be shifted to the right.
True or false? The purpose of the char type is to make it possible to represent the letters of the alphabet, the punctuation characters, and the numeric characters internally in the computer. This is accomplished by assigning a numeric value to each character.
True or false? The char type uses a standard character representation known as Unicode to represent up to 65,535 different characters.
True or false? In Java, you usually represent a character in your program by surrounding it with quotation marks as shown below:
"A".
True or false? Java is an extensible programming language, meaning that there is a core component to the language that is always available. Beyond the core component, different programmers can extend the language in different ways to meet their individual needs.
True or false? As is the case in C++, one of the ways that individual programmers can extend the Java language is to create overloaded operators for the primitive types.
True or false? One of the ways that individual programmers can extend the Java language is to create new types.
True or false? The specific Java mechanism that makes it possible for programmers to define new types is a mechanism known as the class definition .
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.
True.
True.
False. Java does not allow programmers to create overloaded operators for the primitive types.
True.
False. In Java, you usually represent a character in your program by surrounding it with apostrophes as shown below:
'A'.
True.
True.
True.
False. With a floating point type, positive exponent values mean that the decimal point should be shifted to the right . Negative exponent values mean that the decimal point should be shifted to the left .
True.
False. Other than type char , there are no unsigned whole-number primitive types in Java.
True.
False. In Java, there are five different whole-number types:
True.
False. The primitive types are part of the core language.
True.
Four of the possible operations are:
False. If you have an instance of the byte type, the set of all possible values that you can store in that instance is the set of all the whole numbers ranging from -128 to +127.
True.
True.
False. In Java, data type boolean conceptually has nothing to do with numeric values, but deals only with the concept of true or false .
True.
False. Some data types such at type int involve whole numbers only (no fractional parts are allowed) .
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.
