Is CUET compulsory for Galgotias University BCom?

Minimum CUET cutt off for Delhi University is 400+

You can also use Shiskha college predictor -

https://www.shiksha.com/college-predictor

You can try for some low rank colleges under some quota sets like sports (if available).

Also you can explore about -

• Next CUET (1 year good preparation)
• Jamia CET
• BA LL.B
• BBA LL.B
• IIMs intregated MBA 
• M.A foreign language ( Top 5 )
• UGC NET 
• Teaching as a carrer

No. you will not get admission 

With 295 marks, it's very unlikely to get in anywhere in DU for B.Sc Zoology under the general category. You're well below the cutoff thresholds (which is between 396-520) even for less competitive colleges. So, You'll need to explore other universities or courses for a better shot.

Yes, you can get B.Com (Hons.) admission in top Central Universities through CUET. Apply to Delhi University, BHU, AMU, or Jamia Millia. These universities offer excellent faculty, campus life, and good career opportunities in commerce.

With a CUET score of 498, you're below the usual cutoff (?680–760/800) needed for Computer Science at University of Hyderabad. Unfortunately, admission to that programme isn't likely this year. You should look at mid-tier Central or State universities where closing scores fall in the 400–600 range.