Hi Aspirant,
Diploma in Computer Science is a 3-year diploma level course in the field of computer science.
The course requires eligibility for admission to pass 10th or equivalent examination from a recognized school with good grades. Admission is totally based on performance in 10th examinations.
Average fee for the course is Rs. 13000 to Rs. 55000 per year. (varies depending on different colleges).
Some colleges offering DCS (Diploma In Computer Science) are:

• Eshan Group of Institution, Mathura
• Siddhi Vinayak Engineering and Management, Alwar
• Annex College of Management Studies (ACMS), Kolkata
• Desh Bhagat University  (DBU), Punjab
• Techo India University, Kolkata
• Galgotias University, Noida
• Lovely Professional University, Jalandhar
• GD Goenka University, Gurgaon
• Guru Ram Das Institute of Engineering and Technology, Punjab

Good luck!