You can apply online through MP UG counselling and put Holkar Science College as your first preference, with your preferred subject combination.
If you pass the cutoff then the following process will be easy but if you cannot make the cut off and want to join Holkar then wait for the publication of the second and third lists.
Most of the students panic when they are unable to get in the first round. But there are many students who later do not get admission there, this makes space for other students belonging in the 2nd and 3rd lists.
So, it does not matter from what list you get admission, as long as you can be a part of Holkar. There are more than three rounds so try waiting, as it will create some vacancies.
No one has ever failed in honors in all the subjects. Most students tend to fail in chemistry, but this also varies a lot. Let me discuss some of the possible reasons, which may answer your question.
Failed to Qualify for Honours:
Qualified for Honours but failed in any/both general subjects:
Failing in both Honours and General subjects:
Finally, it is really important to know that a student has to complete his or her graduation within 5 years, failing which your registration will be canceled.
Different colleges have different admission criteria for MSc. Computer Science. Most Indian universities require you to either pursue Computer Science as one of the subjects for at least two years of your undergraduate studies, or pursue an Hons. in Computer Science.
So you might not have a chance to pursue an MSc. in Computer Science in India. But you can opt for an MSc. in Mathematics and Computing. This stream deals with Computer Science, but it is deeply rooted in Mathematics. You can sit for the IIT JAM exam as well.