About Question enthuware.ocpjp.v8.2.1866 :

[rolandlensink]

Question:

//assume appropriate import statements
class TestClass{   
 public double process(double payment, int rate)    {
      double defaultrate = 0.10;        //1
      if(rate>10) defaultrate = rate;  //2
      class Implement{
         public int apply(double data){
             Function<Integer, Integer> f = x->x+(int)(x*defaultrate);  //3
             return f.apply((int)data); //4
         }
      }   
    Implement i = new Implement();  
     return i.apply(payment);
   }
}

When you remove line at //2, it's already ok and not necessary to change defaultrate into rate!

[admin]

That is correct and that is why option 2 is correct. Note that the problem statement says, "when applied independent of each other".

[yassine]

this will change how the programme works, for instance, before modifications, the rate to be used to process the data was : either "rate" when when it is >10 and 0.1 otherwise. after modifications we will always use the "rate" even if it is lower than 10 !!!

[admin]

That's alright because the question only expects you to make the code compile. It doesn't make any assumption about the business purpose of the code.

[rafo_gev]

That's alright because the question only expects you to make the code compile. It doesn't make any assumption about the business purpose of the code.

Hello there!
I tried to compile this code (with options 2 and 3):

Remove code at //2.

Replace lines at //3 and //4 with:
BiFunction<Integer, Double, Integer> f = (m, n)->m+(int)(n*m);
return f.apply((int)data, defaultrate);

And the code compiled successfully:

Here is full code in the file TestClass.java

Code: Select all

package test;

import java.util.function.BiFunction;

public class TestClass{
    public double process(double payment, int rate)
    {
        double defaultrate = 0.10;        //1
        class Implement{
            public int apply(double data){
                BiFunction<Integer, Double, Integer> f = (m, n)->m+(int)(n*m);
                return f.apply((int)data, defaultrate);
            }
        }
        Implement i = new Implement();
        return i.apply(payment);
    }
}

I think there is mistake in this question.
Thank you!

[admin]

There is no mistake. The problem statement says that each option is independent. So, you need to make the changes that are given in option 3 only and not 2 and 3 together.