CAT or GATE or PSU?

[abhishekkjain]

Hi friends,

I am currently in 7th sem of my B. Tech (ECE). I am thinking to do take another course in order to get good salary. I am thinking about

CAT
GATE
PSU

I need to know how much time is required to prepare for them and which is better? All my friends are saying go for GATE but I see MBA people get good salary whereas M. Tech are Teachers and doing PhD.

Please HELP!!!