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Answer and Explanation

Question 5

What output is produced by the program shown in Listing 5 ?

Note that 6.283185307179586 is a correct numeric value.

  • A. Compiler Error
  • B. Runtime Error
  • C. 6.283185307179586
  • D. None of the above.
Listing 5 . Listing for Question 5.
public class Ap114{ public static void main(String args[]){System.out.println( new Worker().twoPI);}//end main() }//end class Ap114class Worker{ public static final double twoPI= 2 * Math.PI; }// end class Worker

Answer and Explanation

Question 6

What output is produced by the program shown in Listing 6 ?

Note that 6.283185307179586 is a correct numeric value.

  • A. Compiler Error
  • B. Runtime Error
  • C. 6.283185307179586
  • D. None of the above.
Listing 6 . Listing for Question 6.
public class Ap115{ public static void main(String args[]){System.out.println(Worker.twoPI); }//end main()}//end class Ap115 class Worker{public static final double twoPI = 2 * Math.PI;}// end class Worker

Answer and Explanation

Question 7

What output is produced by the program shown in Listing 7 ?

Note that 6.283185307179586 is a correct numeric value.

  • A. Compiler Error
  • B. Runtime Error
  • C. C. 6.283185307179586
  • D. None of the above.
Listing 7 . Listing for Question 7.
public class Ap116{ public static void main(String args[]){System.out.println(Worker.twoPI); }//end main()}//end class Ap116 class Worker{public static final double twoPI = 2 * myPI;public static final double myPI = Math.PI;}// end class Worker

Answer and Explanation

Question 8

What output is produced by the program shown in Listing 8 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. 0 0.0 false
  • D. null null null
  • E. None of the above.
Listing 8 . Listing for Question 8.
public class Ap117{ public static void main(String args[]){new Worker().display(); }//end main()}//end class Ap117 class Worker{private int myInt; private double myDouble;private boolean myBoolean;public void display(){ System.out.print(myInt);System.out.print(" " + myDouble); System.out.println(" " + myBoolean); }//end display()}// end class Worker

Answer and Explanation

Question 9

What output is produced by the program shown in Listing 9 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. 0 false 5 true
  • D. None of the above.
Listing 9 . Listing for Question 9.
public class Ap118{ public static void main(String args[]){new Worker().display(); new Worker(5,true).display();System.out.println(); }//end main()}//end class Ap118 class Worker{private int myInt; private boolean myBoolean;public Worker(int x, boolean y){ myInt = x;myBoolean = y; }//end parameterized constructorpublic void display(){System.out.print(myInt); System.out.print(" " + myBoolean + " "); }//end display()}// end class Worker

Answer and Explanation

Question 10

What output is produced by the program shown in Listing 10 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. 20 222.0 false --- 5 222.0 true
  • D. None of the above.
Listing 10 . Listing for Question 10.
public class Ap119{ public static void main(String args[]){new Worker().display(); System.out.print("--- ");new Worker(5,true).display(); System.out.println();}//end main() }//end class Ap119class Worker{ private int myInt = 100;private double myDouble = 222.0; private boolean myBoolean;public Worker(){myInt = 20; }//end noarg constructorpublic Worker(int x, boolean y){myInt = x; myBoolean = y;}//end parameterized constructorpublic void display(){ System.out.print(myInt + " ");System.out.print(myDouble + " "); System.out.print(myBoolean + " ");}//end display()}// end class Worker

Questions & Answers

if three forces F1.f2 .f3 act at a point on a Cartesian plane in the daigram .....so if the question says write down the x and y components ..... I really don't understand
Syamthanda Reply
hey , can you please explain oxidation reaction & redox ?
Boitumelo Reply
hey , can you please explain oxidation reaction and redox ?
Boitumelo
for grade 12 or grade 11?
Sibulele
the value of V1 and V2
Tumelo Reply
advantages of electrons in a circuit
Rethabile Reply
we're do you find electromagnetism past papers
Ntombifuthi
what a normal force
Tholulwazi Reply
it is the force or component of the force that the surface exert on an object incontact with it and which acts perpendicular to the surface
Sihle
what is physics?
Petrus Reply
what is the half reaction of Potassium and chlorine
Anna Reply
how to calculate coefficient of static friction
Lisa Reply
how to calculate static friction
Lisa
How to calculate a current
Tumelo
how to calculate the magnitude of horizontal component of the applied force
Mogano
How to calculate force
Monambi
a structure of a thermocouple used to measure inner temperature
Anna Reply
a fixed gas of a mass is held at standard pressure temperature of 15 degrees Celsius .Calculate the temperature of the gas in Celsius if the pressure is changed to 2×10 to the power 4
Amahle Reply
How is energy being used in bonding?
Raymond Reply
what is acceleration
Syamthanda Reply
a rate of change in velocity of an object whith respect to time
Khuthadzo
how can we find the moment of torque of a circular object
Kidist
Acceleration is a rate of change in velocity.
Justice
t =r×f
Khuthadzo
how to calculate tension by substitution
Precious Reply
hi
Shongi
hi
Leago
use fnet method. how many obects are being calculated ?
Khuthadzo
khuthadzo hii
Hulisani
how to calculate acceleration and tension force
Lungile Reply
you use Fnet equals ma , newtoms second law formula
Masego
please help me with vectors in two dimensions
Mulaudzi Reply
how to calculate normal force
Mulaudzi
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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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