About Question enthuware.ocpjp.v8.2.1309 : probably a bug

[jankur]

Hi, while I was taking the second standard test I independently came up with the same solution as described in the following, marked as resolved, bug/error: viewtopic.php?f=38&t=4055
The software marked my answer as incorrect, but according to the aforementioned topic (and the compiler) it probably should be marked as correct. I also reproduced this problem by creating and taking a custom test containing only this one question. Maybe I didn't use the drag'n'drop tool correctly, or maybe there is a regression bug in this question.

[thodoris.bais]

Maybe a mistake in the explanation:

3. You cannot instantiate a Collection because it is an abstract class

But Collection is an interface.

[admin]

Hi, while I was taking the second standard test I independently came up with the same solution as described in the following, marked as resolved, bug/error: viewtopic.php?f=38&t=4055
The software marked my answer as incorrect, but according to the aforementioned topic (and the compiler) it probably should be marked as correct. I also reproduced this problem by creating and taking a custom test containing only this one question. Maybe I didn't use the drag'n'drop tool correctly, or maybe there is a regression bug in this question.

Yes, I see the problem. The issue is that it is opening up too many possibilities of correct options. So I have reduced one yellow target to avoid the solution that doesn't using E. See attachment.

test2.png (21.39 KiB) Viewed 11044 times

I hope this fixes it for good.

-Paul.

[admin]

Maybe a mistake in the explanation:

3. You cannot instantiate a Collection because it is an abstract class

But Collection is an interface.

You are right. Fixed.

thank you for your feedback!

[thodoris.bais]

No worries, Paul, I'm trying to prepare myself for this complex exam.

On topic, watching again the question itself for the second time, I am not sure I understand why the method signature has to be defined like that (or, to phrase it better, why the following is allowed by the compiler):

public < E  extends CharSequence > Collection < E >  getWordsStartingWith( Collection< E > input , char ch ) { }

I mean, to my understanding, the above is only clear like that:

public Collection < E extends CharSequence >        getWordsStartingWith( Collection< E > input , char ch ) { }

So, the question is: what is so special about the

< E  extends CharSequence >

declaration between the access modifier and the return type of the method?

Am I missing a language specification?

[admin]

Yes, that is the syntax. Before you can use E in the method, you need to specify two things - 1. That you are going to use E as a the generic type . and 2. That E extends CharSequence.

That is why <E extends CharSequence> is needed before the return type.

[Rick84]

I'm unable to grab hold of the E in the drag & drop question. The other terms work fine.

I find it odd no one else reported this, so I'm guessing it's something on my end, but I can't figure out what I'm doing wrong. The hover message does appear when I hover over the E, but I can't pick it up. I've tried dragging from slightly above/below or to the side of the E, but nothing seems to be working.

This with Enthuware Test Studio v3.93, build: 20180516 on Windows 10, Java 10.0.2.


EDIT: When I add other terms to my solution and then click the E, the solution is reset and all fields are blank again. This is very odd...

[admin]

Hi Rick,
Could you please replace your question bank file with the latest one from http://enthuware.com/downloads/jqplusv8.ets and see if that fixes the problem?

thank you,
Paul.

[Rick84]

That fixed it, thank you!