Hi allgo!
first off dont be so sure u have mucked this cat ...
but my two pence worth of advice
I work for an MNC as a software pro...and work is tough...u are expected to slog ....I did manage a bit of preparation in the earlier days of work during some training and all that...( this I doubt if u can do if u join Infy and TCS - CTS it's possible )
Two full length tests a week,
saturdays and sundays totally devoted to CAT
an hour or so a day for some sectional tests
...this is what u can manage if u have the determination and in my honest opinion it's enough.
The greater danger than not being able to prepare is that you start to lose focus on furthur studies once you start working because there is that taste independance and good money that after 6 months you think that the line u are in is pretty good after all...
But a word of caution ...dont fall into the trap of sitting at home without working preparing for CAT... it's too much to gamble and waste of a years worth of valuable work ex.
Just my opinion tho