IPU Engineering colleges have a very high closing ranks, based on last year's basis. In your rank of close to 4 lakhs, you can get admission in any of your preferred IPU engineering colleges and pursue Computer Science Engineering.

However, it would be better if you are open to take admission in other engineering colleges as you can get in your rank.

To have a better estimation of the colleges that you can get admission into, you may click on this link:-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this link provided you a better insight in clarifying your doubts.