Silly questions from a cricket newcomer

[Xavier]

Hello everybody,

I have been seeing some of the clips on the multimedia section and I think now I can understand most of the game, but there is still something I can't understand: what happens if a wicket keeper catches the ball and the batsman has not hit it? Is the batsman out (I suppose so), or maybe the wicket keeper has the chance to rule out the batsman only if he has previously hit the ball?

Another question about the spirit of the game: I know people consider test cricket as the real cricket, but it seems to me that most of the times games end in a draw, if there's not a big difference between the two teams.
It could happen tomorrow in India-Pakistan if Pakistan batsmen will survive quite enough to indian bowlers.
Isn't that strange to play for five days to end with no result? (a draw is not properly a tie, isn't it?)
Is the sense of the game that the weekest team can deliver the result to stop the strongest team in a draw?

Thanks for paying attention to my "silly questions" !