<< Chapter < Page Chapter >> Page >
This module contains review questions and answers keyed to the module titled Jb0200: Java OOP: Variables.

Revised: Mon Mar 28 13:31:46 CDT 2016

This page is included in the following Books:

Table of contents

Preface

This module contains review questions and answers keyed to the module titled Jb0200: Java OOP: Variables .

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 .

Write a Java application that reads characters from the keyboard until encountering the # character. Echo each character to the screen as it is read.Terminate the program when the user enters the # character.

Answer 1

Question 2

What is the common name for the Java program element that is used to contain data that changes during the execution of the program?

Answer 2

Question 3

What must you do to make a variable available for use in a Java program?

Answer 3

Question 4

True or false? In Java, you are required to initialize the value of all variables when they are declared.

Answer 4

Question 5

Show the proper syntax for declaring two variables and initializing one of them using a single Java statement.

Answer 5

Question 6

True or false? The Java compiler will accept statements with type mismatches provided that a suitable type conversion can be implemented by the compiler atcompile time.

Answer 6

Question 7

Show the proper syntax for the declaration of a variable of type String[] in the argument list of the main method of a Java program and explain its purpose.

Answer 7

Question 8

Describe the purpose of the type definition in Java.

Answer 8

Question 9

True or false? Variables of type int can contain either signed or unsigned values.

Answer 9

Question 10

What is the important characteristic of type definitions in Java that strongly supports the concept of platform independence of compiled Java programs?

Answer 10

Question 11

What are the two major categories of types in Java?

Answer 11

Question 12

What is the maximum number of values that can be stored in a variable of a primitive type in Java?

Answer 12

Question 13

List the primitive types in Java.

Answer 13

Question 14

True or false? Java stores variables of type char according to the 8-bit extended ASCII table.

Answer 14

Question 15

True or false? In Java, the name of a primitive variable evaluates to the value stored in the variable.

Answer 15

Question 16

True or false? Variables of primitive data types in Java are true objects.

Answer 16

Question 17

Why do we care that variables of primitive types are not true objects?

Answer 17

Question 18

What is the name of the mechanism commonly used to convert variables of primitive types to true objects?

Answer 18

Question 19

How can you tell the difference between a primitive type and a wrapper for the primitive type when the two are spelled the same?

Questions & Answers

a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
how did I we'll learn this
Noor Reply
f(x)= 2|x+5| find f(-6)
Prince Reply
f(n)= 2n + 1
Samantha Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Object-oriented programming (oop) with java' conversation and receive update notifications?

Ask