Win a copy of The Little Book of Impediments (e-book only) this week in the Agile and Other Processes forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Questions

 
Bess Moore
Ranch Hand
Posts: 45
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have a few quick questions, consider this :-

sorry, i think the 1st is from whizlabs, but i can't be sure, i am now remove it, is that ok?

2. Can CMP Entities mapped to all the Entities in ORM (JPA),
Quote "this just a thought not from anywhere"

3. i understand that stateless bean can convert to Webservice via annotation, can MDB do that? what other relationship that MDB have with webservices
Quote "this just a thought not from anywhere"

sorry, i will remember to quote it in details next time
 
Prashant Purkar
Ranch Hand
Posts: 84
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi,

Reliability and performance may actually increase because of little less communication, dependance between tiers.

regards
P
 
Jesper de Jong
Java Cowboy
Saloon Keeper
Posts: 15634
46
Android IntelliJ IDE Java Scala Spring
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
When you copy a question from a book, mock exam or other source, we have a rule here: we require you to quote your sources. So, please tell us exactly from which mock exam your copied this question. (Note, this is not optional - I will have to delete your post if you don't).
 
Tomasz Romanowski
Ranch Hand
Posts: 38
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Here is how I would answer this and my thought process.
"D" is a no-brainer. Definitely a single tier is less scalable than a 3-tier one.
Now let's look at the rest. Security? Improves because you have only one tier to protect. Performance? May improve because you eliminate the cross-tier communication overhead.
Now we're down to reliability vs maintainability.
To me reliability is the most vague one of all. I don't even believe it should be identified as a separate feature. I remember asking a question to my instructor about the difference between reliability and availability and he kind of avoided the question. So let's look at maintainability instead.
Which system is easier to maintain, i.e. diagnose and fix defects efficiently, a single monolythic lump or a nicely partitioned 3-tier system? I guess from the way I worded it definitely, a 3 tier one. So this gives me D (scalability) and E (maintainability) and I don't need to worry about reliability.


Bess Moore wrote:I have a quick question, consider this :-

1. Moving from three tier system to one tier, what are the negative impact? Choose 2

A. Security
B. Performance
C. Reliability
D. Scalability
E. Maintainability

it sound like possible for C, D and E ??

2. Can CMP Entities mapped to all the Entities in ORM (JPA)

3. i understand that stateless bean can convert to Webservice via annotation, can MDB do that? what other relationship that MDB have with webservices
 
Jesper de Jong
Java Cowboy
Saloon Keeper
Posts: 15634
46
Android IntelliJ IDE Java Scala Spring
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Bess Moore wrote:sorry, i think the 1st is from whizlabs, but i can't be sure, i am now remove it, is that ok?

It is allowed to post questions from Whizlabs, as long as you say you've copied it from Whizlabs.
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic