what is the difference b/w strategy and tactic?

Answer 1

Strategy is the long-term plan, identifying where you want to get, what you want to achieve, your overall ambition etc. Tactics are immediate actions which you take in order to move forward within the strategic plan.

It's all in wikipedia, you know.
http://en.wikipedia.org/wiki/Strategy
http://en.wikipedia.org/wiki/Tactic_%28method%29