Dear friend
If u r talking about engeneering, there r 2 cources
1. B.TECH   2. M.TECH
IF u do b.tech and m.tech seperately, btech will take 4 years and mtech will take 2 years...   Totally 6 years if u do both seperately
But if it is confirm in ur mind that u have to do mtech also
Then while taking admission in any university
There is a option of integrated program, which offers b.tech + mtech and tgis integrated courses take only 5 years.... Hence these saves ur one year

Just they have one disadvantage that... If in between these 5 years.. U say that i dont wanna go for  m.tech
I only want b.tech

Then it will be not possible

Regards..
Kingly upvote if it helped