Enthuware

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!

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

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 !!!

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.

admin wrote: ↑

Sat Apr 07, 2018 4:39 am

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

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.