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Part of a self-assessment test designed to help you determine how much you know about Java primitive types.

Revised: Fri Apr 08 23:47:01 CDT 2016

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Table of contents


This module is part of a self-assessment test designed to help you determine how much you know about object-orientedprogramming using Java.

Questions and answers

The test consists of a series of questions with answers and explanations of the answers.

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.

Programming challenge questions

The module also contains a section titled Programming challenge questions . This section provides specifications for one or more programs that you should be able to write once you understand the answersto all of the questions. (Note that it is not always possible to confine the programming knowledge requirement to this and earlier modules. Therefore, youmay occasionally need to refer ahead to future modules in order to write the programs.)

Unlike the other questions, solutions are not provided for the Programming challenge questions . However, in most cases, the specifications will describe the output that your program should produce.


I recommend that you open another copy of this document in a separate browser window and use the links to under Listings to easily find and view the listings while you are reading about them.


Question 1 .

What output is produced by the program in Listing 1 ?

  • A. Compiler error
  • B. Runtime error
  • C. Hello World
  • D. Goodbye Cruel World
Listing 1 . Question 1.
public class Ap001{ public static void main(String args[]){new Worker().hello(); }//end main()}//end class definition class Worker{public void hello(){ System.out.println("Hello World");}//end hello() }//end class definition

Answer and Explanation

Question 2 .

What is the largest (algebraic) value of type int?

  • A. 32767
  • B. 2147483647
  • C. -2147483647
  • D. -32768

Answer and Explanation

Question 3 .

What is the smallest (algebraic) value of type int?

  • A. -2147483648
  • B. -2147483647
  • C. 32767
  • D. -32768

Answer and Explanation

Question 4 .

What two values are displayed by the program in Listing 2 ?

  • A. -2147483648
  • B. 1.7976931348623157E308
  • C. -2147483647
  • D. 4.9E-324
Listing 2 . Question 4.
public class Ap003{ public static void main(String args[]){new Worker().printDouble(); }//end main()}//end class definition class Worker{public void printDouble(){ System.out.println(Double.MAX_VALUE); System.out.println(Double.MIN_VALUE); }//end printDouble()}//end class definition

Answer and Explanation

Question 5 .

What output is produced by the program in Listing 3 ?

  • A. true
  • B. false
  • C. 1
  • D. 0
Listing 3 . Question 5.
public class Ap004{ public static void main(String args[]){new Worker().printBoolean(); }//end main()}//end class definition class Worker{private boolean myVar; public void printBoolean(){System.out.println(myVar); }//end printBoolean()}//end class definition

Questions & Answers

What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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
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