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Jb0220r Review

Module by: Richard Baldwin. E-mail the author

Summary: This module contains review questions and answers keyed to the module titled Jb0220: Java OOP: Statements and Expressions.

Preface

This module contains review questions and answers keyed to the module titled Jb0220: Java OOP: Statements and Expressions .

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.

Questions

Question 1 .

A Java program is composed of a series of what?

Answer 1

Question 2

Statements in Java are constructed from what?

Answer 2

Question 3

Describe an expression in Java.

Answer 3

Question 4

What does a method call evaluate to in Java?

Answer 4

Question 5

True or false? Java supports named constants. If false, explain why.

Answer 5

Question 6

Provide a code fragment that illustrates the syntax for creating a named constant in Java.

Answer 6

Question 7

True or false? Java supports a constant type. If false, explain why.

Answer 7

Question 8

What is the common method of controlling the order of evaluation of expressions in Java?

Answer 8

Question 9

If you don't use matching parentheses to control the order of evaluation of expressions, what is it that controls the order of evaluation?

Answer 9

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.

Missing image

This image was also inserted for the purpose of inserting space between the questions and the answers.

Missing image

Answers

Answer 9

If you don't provide matching parentheses to control the order of evaluation, the order will be determined by the precedence of the operators with the operations having higher precedence being evaluated first. For example, multiply and divide have higher precedence than add and subtract.

Back to Question 9

Answer 8

You can control the order of evaluation by the use of matching parentheses.

Back to Question 8

Answer 7

False. Java does not support a constant type. However, in Java, it is possible to achieve the same result by declaring and initializing a variable and making it final .

Back to Question 7

Answer 6

The syntax for creating a named constant in Java is shown below.

Note:

A named constant in Java

final float PI = 3.14159;

Back to Question 6

Answer 5

True. Java supports named constants that are constructed using variable declarations with the final keyword.

Back to Question 5

Answer 4

A method call evaluates to the value returned by the method.

Back to Question 4

Answer 3

An expression is a specific combination of operators and operands that evaluates to a particular value. The operands can be variables, constants, or method calls.

Back to Question 3

Answer 2

Statements in Java re constructed from expressions.

Back to Question 2

Answer 1

A Java program is composed of a series of statements.

Back to Question 1

Miscellaneous

This section contains a variety of miscellaneous information.

Note:

Housekeeping material
  • Module name: Jb0220r Review: Statements and Expressions
  • File: Jb0220r.htm
  • Originally published: 1997
  • Published at cnx.org: 11/24/12
  • Revised: 01/02/13

Note:

Disclaimers:

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.

-end-

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