Some errors/errata in Sybex "OCP Java SE 11 Developer Practice Tests" book

[Michael Siro]

Hi all,

I found possibly following errors in the book “OCP Java SE 11 Developer Practice tests” from Scott Selikoff and Jeanne Boyarsky.
Since Jeanne is active in this forum I try to give the feedback here.

1) Page 21 question 18
Question says “Choose two” but the answer contains three options A,D and F

2) Page 47 question 50
Answers are B and D
But E should also be correct because three classes do compile: Leader, Follower and Dancer.

3) Page 57 question 74
“How lines of the following code do not compile?” The word “many” is missing

4) Page 119 question 213
Answer “E” should be wrong because the private method process() of the Michael interface is NOT visible in the Twins class

Cheers
Michael

[henry leu]

Hi,

Did you get a confirmation of these errors? I encountered these same errors in the book.

Thanks!

[Michael Siro]

No, I didn't get any answer so far

5) Page 256 question 47
Answer "D" "jdeps --jdkinternals cookie.jar" seems to be also wrong
jdeps offers "-jdkinternals" or "--jdk-internals"

[Jeanne Boyarsky]

Michael Siro wrote:1) Page 21 question 18
Question says “Choose two” but the answer contains three options A,D and F

Someone else reported that and I've logged it in the errata. (I think you reported it first but I saw the other one first.)

Michael Siro wrote:2) Page 47 question 50
Answers are B and D
But E should also be correct because three classes do compile: Leader, Follower and Dancer.

Agreed. Added to the errata.

Michael Siro wrote:3) Page 57 question 74
“How lines of the following code do not compile?” The word “many” is missing

Agreed. Added to the errata.

Michael Siro wrote:4) Page 119 question 213
Answer “E” should be wrong because the private method process() of the Michael interface is NOT visible in the Twins class

Someone else reported that and I've logged it in the errata. (I think you reported it first but I saw the other one first.)

[Jeanne Boyarsky]

Michael Siro wrote:No, I didn't get any answer so far

5) Page 256 question 47
Answer "D" "jdeps --jdkinternals cookie.jar" seems to be also wrong
jdeps offers "-jdkinternals" or "--jdk-internals"

Another one where I saw someone else's report first.