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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

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
How can I make nanorobot?
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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