About Question enthuware.ocpjp.ii.v11.2.3322 :

[dfigueira]

Couldn't this option be accepted as well?

Code: Select all

.collect(Collectors.filtering(p, Collectors.mapping(Book::getTitle, Collectors.toSet()));

It returns the same result as the options marked as correct.

[admin]

Yes, this is option 5 and it is marked as correct already.

[teodorj]

for the third option to be correct

.collect(Collectors.partitioningBy(p, Collectors.mapping(Book::getTitle, Collectors.toSet())));

the return type should be Map<Boolean, Set<String>> newBooks

But the option

.collect(Collectors.filtering(p, Collectors.mapping(Book::getTitle, Collectors.toSet()));

is incorrect in my side. Please see below.

[admin]

Which version of which question bank are you using?

[teodorj]

This is for IZ0-817 exam

Ihave the latest ets viewer

[admin]

ok, I see that it is not updated in 817 question bank. Sorry about that. Updated now in v 1.20

[teodorj]

my ets viewer did not see update on question bank

[teodorj]

And also, some of the question in ETS does not have "*" in Discuss button when there are discussion in this forum

[admin]

Yes, the matching algorithm for questions in the s/w with the subject in topics of the forum is not accurate because of same question appearing in different versions of the exam. It errs on the side of caution.

[edufin166@yahoo.com]

Theis alternative "is .collect(Collectors.filtering(p,      Collectors.mapping(Book::getTitle, Collectors.toSet())));"

should return Map<String,Set<String>>, but seems me that is returning Set<String>.

Is it really correct?

[admin]

The call to Collectors.mapping(Book::getTitle, Collectors.toSet()) converts a stream of Books into a Set of title string. This call is wrapped inside Collectors.filtering(p,...), which filters the Set of titles based on the given Predicate. So it returns a Set.
Why do you think it should return a Map?

You may also want to try compiling and running the given code.