tough MS commodity desk IV - Aug 2010

Q: when would u turn on dirty read?????

Q: You have been consulting... Any reason you are coming back to S'pore?

Q: can you tell me some of the drawbacks of stored-proc?

Q: challenges in database refactor?

Q: technical/project challenges you faced in your career?

Q: how do you put across your argument in that challenging situation?

Q: when I enter some.pl in a shell, what happens?

Q: 3 threads are adding/remove/reading single elements in a hashmap. How do you optimize synchronization?
A (now i think): i guess lockfree is perhaps the best
A: concurrent hashmap with each segment holding multiple keys
Q: but if remover and reader use different keys, then why should they wait for each other?
A: perhaps segment should hold just one key?

Q: what other maps beside hashmap?
A: treemap, a red-black tree
Q: what's a red-black tree?
A: perhaps a balanced tree
Q: how is it balanced?
A: perhaps by shifting the root?

Q: What are the list implementations?

Q: is insertion faster in linked list or array-based list

Q: is insertion faster in linked list or hashmap

Where is c++ used? quant lib for risk, PnL and trade booking. Is c++ going away? no.

2 main specializations -- physical scheduling + risk including pnl attribution