SingleThreadModel:JWebPlus

[Vikrama Sanjeeva]

Question ID :1000056221780
A servlet implements MultiThreadModel interface. The servlet container may run multiple threads on its methods.
ANS: true
EXPLANATION By JWebPlus:
MultiThreadModel is not a standard interface. It may be a user defined interface and in that case, the given statement is correct.
Well, i think its totally non-sense question!.And hope that these types of question will not be asked by SUN.

What do U think?
Bye.
Viki.

[Jim Bertorelli]

I think it is a perfectly valid question. If one doesn't know the basics, it is indeed very tempting to think that MultiThreadModel is a standard interface (just like SingleThreadModel).

[Mark Spritzler]

I think it is a perfectly valid question. If one doesn't know the basics, it is indeed very tempting to think that MultiThreadModel is a standard interface (just like SingleThreadModel).

Exactly, now if the question said it implements MultiThreadModel and SingeThreadModel, then it would be false
Mark

[Gennady Shapiro]

I ve seen the same question about SingleThreadedModel, that one is easy to miss!
[ February 28, 2002: Message edited by: Gennady Shapiro ]

[Maulin Vasavada]

i'm with Viki. if they dont say that its a user defined interface and is expected 've methods doing appropriate things we cant be sure of things.
i agree that one must know that this is not a standard interface and so it must be a user defined but what about the interface definition??? if the question doesnt say anything about that we cant make any decision. just giving a name "MultiThreadModel" doesnt mean that it tries to do something the name suggest. it might just have a method call print() which does nothing substantial.
again, someone would argue that it is given that "it MAY do so and so..." in the question and its not "MUST" that was used so the question is valid but still i dont agree 'coz in that case there is no damn meaning in asking such question in SCWD exam as it is all about servlet/jsp api and their fundamentals. if this question is there on programmers exam then it is fine where its not ALL about api stuff only and includes fundamentals as well.
i strongly agree with viki.
regards
maulin.

[Madhav Lakkapragada]

question about SingleThreadedModel
You would see these on the javaranch mock also.
I posted them as typos in this forum earlier.
They are on our list of to do's. We will take care of them, please bear with us.
- satya.......we are not alone in this you know...atleast our mock exam is free.

[Gennady Shapiro]

I am totally missing Maulin's point on this. But this is totally unambigious question...the servlet container will not not dispatch mulpitle threads only on SingleThreadModel no matter what your MultiThreadModel may do. Perfectly clear to me.

P.S. UNless MultiThreadModel extends SingleThreadModel but this is really stupid
[ February 28, 2002: Message edited by: Gennady Shapiro ]

[Maulin Vasavada]

hi Gennady,
so u also agree that there is no relation to the metioning of MultiThreadModel interface in this question as server container only look at the SingleThreadModel interface if that is implemented.
then Viki's point is right- "its a non-sense question" as per quoted by him. isnt it?
regards,
maulin

[Gennady Shapiro]

if (myservlet instanceof SingleThreadModel) {
// single threaded access
} else {
// multi threaded access
}
MultiThreadedModel falls into 'else' category. Thats it. There is nothing difficult about it. Crystall clear.

[Vikrama Sanjeeva]

Originally posted by Jim Bertorelli:
I think it is a perfectly valid question. If one doesn't know the basics, it is indeed very tempting to think that MultiThreadModel is a standard interface (just like SingleThreadModel).

First decide that whether question want to ask basic's or IQ?.If they want to ask IQ, then totally valid question.And if they want to check basic's of threading then they must say that what is the nature of given MultiThreadModel, so that one can easily test his/her basic's about threading.Rather thinking that is there any MultiThreadModel in Servlets
Bye.
Viki.
[ March 01, 2002: Message edited by: Vikrama Sanjeeva ]

[Paul Anilprem]

Even if full code (if any) of MultiThreadModel interface is given, your answer would still be the same.
The point is not in knowing MultiThreadModel. The point isin not confusing SingleThreadModel with any other similar sounding but fake interface.
If there were a question like: Which of the following interfaces must be implemented by a servlet to make sure that multiple threads are not run over its methods:
1. SingleThreadModel
2. SingleThreadedModel
3. NoThreadModel
4. MultiThreadModel
5. MultipleThreadModel
I don't think you would ask for the details of all the interfaces. There is no need to. All you need to know is one right name, which is SingleThreadModel.

[Vikrama Sanjeeva]

If there were 6th option given like this,
6:non of the above
Then i select this one.(which SUN want from its candidate).The reason is:B/C the servlet which i am going to develop must follow Servlet specificatio and API.And there is not MultiThreadModel in servlet specification & API as well.
And if the 6th option is not given then i will select 4th one.
I think Paul if u want to make the question right then I suggest you to give a scenario to the candidate.....Again I say decide what do u want to check.!
Bye.
Viki.
[ March 01, 2002: Message edited by: Vikrama Sanjeeva ]

[Paul Anilprem]

Originally posted by Vikrama Sanjeeva:
And if the 6th option is not given then i will select 4th one.

Beats me!

[Ken Pelletier]

Update on that question: I just took the JWebPlus mock exam and the answer to that question has been changed.
It's now false, and the given reason is that it will not compile because there is no such interface MultiThreadModel
Personally, I think the question is bogus as written since you're left wondering whether they're asking you to spot the invalid interface (which they *now* apparently are) or expecting you to assume that MultiThreadModel is some custom interface you got elsewhere and that it will compile -- too vague.
IMHO, of course.

[Bruce Jin]

I think only if one of the answers was
it will not compile because there is no such interface MultiThreadModel.
Then it would be a good question. Otherwise I agree with other people: it is an ambiguous question.

[Vedhas Pitkar]

Hmmmmmmmmmm.......................
Do the objectives mention the MultiThreadModel?I guess to crack the SCWCD all that is needed r the specs & sticking to the objectives.
anyway it's a real silly Question....

[Paul Anilprem]

This question has been removed from the question bank