java interview with Investment bank -4

This is another set of investment bank java interview questions. This interview was not attended by me but I got this these questions from one of my team mate, who passed these interviews to receive the IB job offer. Here the main focus area were again java collections, memory model, java 1.5 concurrency and design pattern.

1) Tell me about career profile and describe your one of the main project?
   then deep drive on my current project.. why u are using these technology? what feathers of java 1.6 you are using? how you r managing concurrency? how the exceptions are handled?

2) Java collections - when to use ArrayList and Linked list?

3) what is soft reference, weak reference, phantom reference?

4) How is memory managment in java? how the heap is divided in different area?

5) where String literals are stored in heap?

6) How to handle out of memory error and what tools we can use to figure out memory leaks?

7) what is synchronization and locks in java 1.5?

8) news feathers in java 1.5 and java 1.6

9) how to do thread scheduling in java 1.5?

10) con-currency classes in java 1.5?

11) expalin Singltion design pattern and what is double check locking (DCL)  and how to do it with volatile?

Puzzle :

1) you are in one room at 5'th floor of building and it has 3 bulbs and the switch for these bulbs are in ground floor and you can go down only 1 time and tell me how you know particular switch for each bulb? ,, tip --use bub heating funda**

2) you have 1000 teams and each team plays knock out with each other, how many minimum matches you need to figure out winner?

3) write the pragramme to get square root of 100? do not use java math functions?

Management Round:
1) tell me about yourself?
2) Why you want to leave current job?
3) Why you want to join this bank? ..[Get the history of bank and current CEO details and latest mergers]
4) Your key strengths and weakness?
5) tell me how you were managing team?


HR Round:
1) Why would you like to leave current role?
2) What is your long term plan, how you would you like to growth your career?