Introduction to Programming with Java: A Problem Solving Approach

John S. Dean, Raymond H. Dean

Chapter 3 Java Basics - all with Video Answers

Educators

Chapter Questions

03:07

Problem 1

What does this chapter's Dream.java program do?

Sarvesh Somasundaram

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02:09

Problem 2

What are the filename extensions for Java source code and bytecode, respectively?

Vishal Sharma

Numerade Educator

01:38

Problem 3

Why does source code have comments?

Adam Conner

Numerade Educator

01:48

Problem 4

For a file with a public class, the program's filename must match the program's class name except that the filename has a $\cdot$ java extension added to it. $(\mathrm{T} / \mathrm{F})$

Foster Wisusik

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01:13

Problem 5

Standard coding conventions dictate that class names start with a lowercase first letter. (T / F)

Ernest Castorena

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06:21

Problem 6

In Java, the case of a character does matter. (T / F)

Anthony Ramos

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00:41

Problem 7

A program's start-up method, main, should be in a class that is public. (T / F)

Ernest Castorena

Numerade Educator

00:41

Problem 8

The main method itself must be public. (T / F)

Ernest Castorena

Numerade Educator

01:30

Problem 9

From your memory alone (don't look for the answer in the book), write the main method heading.

Anas Venkitta

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00:39

Problem 10

Identify two types of groupings that must be enclosed in braces.

Cory Kuzinski

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01:47

Problem 11

From your memory alone (don't look for the answer in the book), write the statement that tells the computer to display this string of text: Here is an example

Anas Venkitta

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00:30

Problem 12

List all of the types of characters that may be used to form an identifier.

Kyler Gray

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00:53

Problem 13

List all of the types of characters that may be used as the first character of an identifier.

Ernest Castorena

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01:40

Problem 14

You should abbreviate variable names by omitting vowels, in order to save space. (T / F)

Meghan Mulcahy

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01:56

Problem 15

Why is it good practice to use a separate line to declare each separate variable?

Adam Conner

Numerade Educator

00:49

Problem 16

There must be a semicolon after every assignment statement. (T / F)

Ernest Castorena

Numerade Educator

01:06

Problem 17

Initialization "kills two birds with one stone". What are the "two birds"?

Evan Sun

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03:06

Problem 18

The most appropriate type to use for financial accounting is ___________

Jennifer Stoner

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00:23

Problem 19

For each statement, specify true or false:
a) 1234.5 is a floating-point number. (T / F)
b) 1234 is a floating-point number. (T / F)
c) $1234 .$ is a floating-point number. (T / F)

Amy Jiang

Numerade Educator

03:18

If you try to assign an int value into a double variable, the computer automatically makes the conversion without complaining, but if you try to assign a double value into an int variable, the compiler generates an error. Why?

Samriddhi Singh

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01:42

Problem 21

For each statement, specify true or false:
a) 0.1234 is a float. (T / F)
b) $0.1234 \mathrm{f}$ is a float. (T / F)
c) 0.1234 is a double. (T / F)
d) 1234.0 is a double. (T / F)

Nick Johnson

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00:39

Problem 22

What modifier specifies that a variable's value is fixed/constant?

Ernest Castorena

Numerade Educator

01:30

Problem 23

What is the remainder operator?

Ankit Gupta

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01:04

Problem 24

Write the following mathcmatical cxpressions as legal Java cxpressions:
a. $\frac{3 x-1}{x^{2}}$
b. $\frac{1}{2}+\frac{1}{x y}$

Heather Zimmers

Numerade Educator

00:31

Problem 25

Assume this:
$\operatorname{int} m=3, n=2$
double $x=7.5$
Evaluate the following expressions:
$\begin{array}{llllll}\text { a) } & (7-n) & \text { ? } & 2 & \text { ? } & 7.5 & \text { 9 }\end{array}$
b) $(4+n / m) / 6.0 * x$

Liuxi Sun

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