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Answer and Explanation

Question 6

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

  • A. Compiler Error
  • B. Runtime Error
  • C. 4 -3
  • D. 3 -4
  • E. None of the above
Listing 6 . Listing for Question 6.
public class Ap044{ public static void main(String args[]){new Worker().doCast(); }//end main()}//end class definition class Worker{public void doCast(){ double w = 3.5;double x = -3.499999999999; System.out.println(doIt(w) +" " + doIt(x));}//end doCast()private int doIt(double arg){ if(arg>0){ return (int)(arg + 0.5);}else{ return (int)(arg - 0.5);}//end else }//end doIt()}//end class definition

Answer and Explanation

Question 7

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

  • A. Compiler Error
  • B. Runtime Error
  • C. 3.5/9/true
  • D. None of the above
Listing 7 . Listing for Question 7.
public class Ap045{ public static void main(String args[]){new Worker().doConcat(); }//end main()}//end class definition class Worker{public void doConcat(){ double w = 3.5;int x = 9; boolean y = true;String z = w + "/" + x + "/" + y; System.out.println(z);}//end doConcat() }// end class

Answer and Explanation

Question 8

Which of the following best approximates the output from the program shown in Listing 8 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. Dummy@273d3c
  • D. Joe 35 162.5
Listing 8 . Listing for Question 8.
public class Ap046{ public static void main(String args[]){new Worker().doConcat(); }//end main()}//end class definition class Worker{public void doConcat(){ Dummy y = new Dummy();System.out.println(y); }//end doConcat()}// end class class Dummy{private String name = "Joe"; private int age = 35;private double weight = 162.5; }//end class dummy

Answer and Explanation

Question 9

Which of the following best approximates the output from the program shown in Listing 9 ?

  • A. Compiler Error
  • B. Runtime Error
  • C. C. Dummy@273d3c
  • D. Joe Age = 35 Weight = 162.5
Listing 9 . Listing for Question 9.
public class Ap047{ public static void main(String args[]){new Worker().doConcat(); }//end main()}//end class definition class Worker{public void doConcat(){ Dummy y = new Dummy();System.out.println(y); }//end doConcat()}// end class class Dummy{private String name = "Joe"; private int age = 35;private double weight = 162.5;public String toString(){ String x = name + " " +" Age = " + age + " " + " Weight = " + weight;return x; }}//end class dummy

Answer and Explanation

Question 10

Which of the following best approximates the output from the program shown in Listing 10 ? (Note the use of the constructor for the Date class that takes no parameters.)

  • A. Compiler Error
  • B. Runtime Error
  • C. Sun Dec 02 17:35:00 CST 2012 1354491300781
  • D. Thur Jan 01 00:00:00 GMT 1970
  • 0
  • None of the above
Listing 10 . Listing for Question 10.
import java.util.*; public class Ap048{public static void main( String args[]){ new Worker().doConcat();}//end main() }//end class definitionclass Worker{ public void doConcat(){Date w = new Date(); String y = w.toString();System.out.print(y); System.out.println(" " + w.getTime());}//end doConcat() }// end class

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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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