Tuesday, June 24, 2008

Cloud Computing

How will it be if we all get laptops and in the office we have no fixed chairs but only bean bags.
Even no need to come to office if you dont feel like. just work from your home because your office will no more have any infrastructure like server and network to connect. Simply get connected via net and start working. This is no more a dream. Companies like Google, Microsoft and Amazon are making this possible.
Last month I attended a seminar on cloud computing given by Amazon. Its realy very exciting concept coming up. Let me share in nut shell what is this all about.
This is based on Saas(Software as a service) architecture and Pay-Per-Use service. Its like Amazon has its own server. I can register with Amazon to use that server. I dont have to buy my own server or infrastructure. I will just pay for what i use. If i need more, automatically depending upon my use, infrastructure will be provided. Its a way to increase capacity or add capabilities on the fly without investing in new infrastructure, training new personnel, or licensing new software. Security is also guarented.

I wil come up with its pros n cons very soon.

Few Interview Questions (DW and informatica related)

1. What exactly is an informatica transformation?
2. What is active and passive transformation?
3. What is connected and unconnected transformation?
4. Is there any difference between pre-post session commands and pre-post sql commands?
5. Can we write an UNIX command in informatica?
6. What is SCD? Describe type1 and type2 SCD?
7. What is Confirmed Dimension?
8. What is the relationship between a dimension and a fact table? is it many to many to one to many?
9. What is simple star and multi-star schema?
10. How to avoid duplicates in informatica? At least 3-4 ways.
11. Difference between star and snow flake schema?
12. Explain the use of surrogate key?
13. What are the transformations that you have not used?
14. Do you have a distinct option in sorter?
15. If the problem is during target loading what all you can do?
16. What is OCI?
I will keep updating more questions and the answers in few days....

Wednesday, June 18, 2008

Understanding climate change

Friends,
While going through BBC News website. I found a very interseting link regarding understanding the climate change. With pictures and animated guide it gives a good insight into how the greenhuse effect is happening, how the climate is changing over the century, how carbon cycle is getting affected. Its very short and interesting. Check out the below link...
Climate Change

Incredible India

DAFFY DEFINITIONS:-

WHO IS A POLITICIAN??

One who shakes your hand before elections and your confidence after.