Preparation for J2EE, Java Interview

[tara]

I din't knew that Scrum was popular. I will look into this.

[tara]

Any quick brushup materials on JUnit?

I have used it long time ago. Basically it's a testing tool but in reality most developers(no matter how much micro manage them) don't write code in such a way that the business logic could be tested independantly. But it's a good tool to mention in resume if you have hands on experience.

[courtneywalsh]

May 6, 2011 8:47:24 GMT -5 tara said:

Any quick brushup materials on JUnit?

I have used it long time ago. Basically it's a testing tool but in reality most developers(no matter how much micro manage them) don't write code in such a way that the business logic could be tested independantly. But it's a good tool to mention in resume if you have hands on experience.

Totally forgot about JUnit. Had used LoadRunner very briefly for testing on JRUN app server.

[tara]

Never used LoadRunner. Any useful tips on same? I know it's a regression tool.

[courtneywalsh]

May 6, 2011 9:17:12 GMT -5 tara said:

Never used LoadRunner. Any useful tips on same? I know it's a regression tool.

Might have to go back to have a look at it. Last used it in 2007.

[tara]

J2EE architecture question:

If the web container is configured to hadle multiple applications, if user types a URL and ask for a resource (request HTML or static page OR perform some CRUD actions), how does the web container know which servlet to handle that request?

[readytogo]

Sept 17, 2011 9:08:22 GMT -5 tara said:

J2EE architecture question:

If the web container is configured to hadle multiple applications, if user types a URL and ask for a resource (request HTML or static page OR perform some CRUD actions), how does the web container know which servlet to handle that request?

Let me try.

The web.xml containes the servlet mapping which says what url(uri) to be handled by which servlet.

[tara]

Core java question:(from Collection framework)
We all know that anything that can be done using vector can also be done implementing Arraylist and given a choice to write new code, we prefer using Arraylist over vector.
Then why is Vector is not depricated?

[tara]

Sept 21, 2011 0:18:23 GMT -5 tara said:

Core java question:(from Collection framework)
We all know that anything that can be done using vector can also be done implementing Arraylist and given a choice to write new code, we prefer using Arraylist over vector.
Then why is Vector is not depricated?

-May be for backwad compatibility?
-Also, there are some classes that implement vecotor
- It does not hurt to leave vector class as is

[tara]

Core Java question: What will happen if checked excpetion is never caught in the application?

[happyparent]

Sept 25, 2011 8:43:52 GMT -5 tara said:

Core Java question: What will happen if checked excpetion is never caught in the application?

Application/program terminates. The excpetion is finally caught in Uncaught exception and the application terminates.

[readytogo]

Core java question:
Let say you declared a list like this
public ginal List test=New Arraylist();

You now want to intialize test Arraylist, will this work?

[happyparent]

Sept 28, 2011 8:32:32 GMT -5 readytogo said:

public ginal List test=New Arraylist();

I think you mean final
public final List test=New Arraylist();

It gives compilation error. Initializing a variable once it's decleared final is not possible.

[happyparent]

Architect/lead level question:
At what stage of SDLC would you do code review?

[courtneywalsh]

Oct 1, 2011 6:28:29 GMT -5 happyparent said:

Architect/lead level question:
At what stage of SDLC would you do code review?

It is better to do it along with the Unit Testing done by the developer. Database Connections not closed or not in finally block should not go any further.

In SDLC it would be before UAT/Testing phase.