Sybex 816 Errata on Pages 342 and 677

[Edmund Yong]

Chapter 6, Page 342, Question 14 - There are 3 packages mentioned: "magic.wand", "magic.portion" and "magic.until". It says to give each module the same name as the package. Therefore, the reference to the module "magic.helper" is incorrect.

Appendix B, Page 677, answer to Chapter 6 question 15 - The sentence "The service provider must have a uses directive, but that is on the service provider interface". This is incorrect as it is the service locator that must have the uses directive. Or maybe the sentence is trying to say that the service provider must have the requires directive on the service provider interface.

[Jeanne Boyarsky]

Edmund Yong wrote:Chapter 6, Page 342, Question 14 - There are 3 packages mentioned: "magic.wand", "magic.portion" and "magic.until". It says to give each module the same name as the package. Therefore, the reference to the module "magic.helper" is incorrect.

Right before that, it says that the magic.helper module contains the magic.util package. The part about giving the module/package the same name applies to the other two which don't have anything specific. While this could certainly be clearer, I don't think it is wrong. I've added a note in our private list of things that could be clearer.

[Jeanne Boyarsky]

Edmund Yong wrote:Appendix B, Page 677, answer to Chapter 6 question 15 - The sentence "The service provider must have a uses directive, but that is on the service provider interface". This is incorrect as it is the service locator that must have the uses directive. Or maybe the sentence is trying to say that the service provider must have the requires directive on the service provider interface.

Agreed and added to errata. Good catch!

[Jeanne Boyarsky]

Jeanne Boyarsky wrote:

Edmund Yong wrote:Chapter 6, Page 342, Question 14 - There are 3 packages mentioned: "magic.wand", "magic.portion" and "magic.until". It says to give each module the same name as the package. Therefore, the reference to the module "magic.helper" is incorrect.

Right before that, it says that the magic.helper module contains the magic.util package. The part about giving the module/package the same name applies to the other two which don't have anything specific. While this could certainly be clearer, I don't think it is wrong. I've added a note in our private list of things that could be clearer.

Actually, there is an errata there. This post explains the problem with magic.helper and magic.util. It must be magic

[Hasan Çelik]

Dear Jeanne,

As a result, what is the correct result of the question. In the explanation, you said that no modules needed to specify requires on the service provider since that is the implementation. But as I understand from the chapter,

"service provider" needs require directive for "service provider interface".

Did I misunderstand something?

Jeanne Boyarsky wrote:

Jeanne Boyarsky wrote:

Edmund Yong wrote:Chapter 6, Page 342, Question 14 - There are 3 packages mentioned: "magic.wand", "magic.portion" and "magic.until". It says to give each module the same name as the package. Therefore, the reference to the module "magic.helper" is incorrect.

Right before that, it says that the magic.helper module contains the magic.util package. The part about giving the module/package the same name applies to the other two which don't have anything specific. While this could certainly be clearer, I don't think it is wrong. I've added a note in our private list of things that could be clearer.

Actually, there is an errata there. This post explains the problem with magic.helper and magic.util. It must be magic

[Jeanne Boyarsky]

Hasan Çelik wrote:Dear Jeanne,

As a result, what is the correct result of the question. In the explanation, you said that no modules needed to specify requires on the service provider since that is the implementation.

I think the book answer is right if you apply the errata
Options D, E, and F should say “magic.helper” instead of “magic.util”

[Hasan Çelik]

So sorry I think we are talking about different question. I hadn't mentioned that question. My question was about the question 15. By the way to recall it, it was;

15. Suppose you have separate modules for a service provider interface, service provider, service locator, and consumer. Which module(s) need to specify a requires directive on the service provider?

Service locator

Service provider interface

Consumer

Consumer and service locator

Consumer and service provider

Service locator and service provider interface

Consumer, service locator, and service provider interface

None of the above

When I looked that the answer of this question, a sentence like that "no modules needed to specify requires on the service provider since that is the implementation" is written. But as I understand from the chapter,

"service provider" needs require directive for "service provider interface".

I thought the answer was "Service provider interface" but "none of above" is the correct answer. Did I misunderstand something?

Jeanne Boyarsky wrote:

Hasan Çelik wrote:Dear Jeanne,

As a result, what is the correct result of the question. In the explanation, you said that no modules needed to specify requires on the service provider since that is the implementation.

I think the book answer is right if you apply the errata
Options D, E, and F should say “magic.helper” instead of “magic.util”

[Jeanne Boyarsky]

Hasan Çelik wrote:
When I looked that the answer of this question, a sentence like that "no modules needed to specify requires on the service provider since that is the implementation" is written. But as I understand from the chapter,

"service provider" needs require directive for "service provider interface".

This is true. It's the opposite of the question though. service provider interface doesn't depend on service provider so it isn't the answer here.