Yes, You have completed your MCA and you are eligible for an MS in computer science and engineering, but it depends on where you are applying. Here's more information regarding requirements:
- Eligibility: Many universities accept MCA graduates for MS CSE programs, especially you are mastered in your core subjects like algorithms, data structures, operating system, computer networks etc. hence you have the basic academics requirements.
- Some institute may ask for GATE score, you must check the eligibility on the particular institute you are applying for.
- If you are applying for abroad then some institute may ask for ILETS/TOEFL.
- Lastly check specific university's eligibility criteria because rule can vary widely.

Yes, in most cases, having an MCA (Master of Computer Applications) makes you eligible for an MS (Master of Science) in Computer Science . Many universities accept MCA graduates for their MS CS programs. The MCA provides a solid foundation in computer science principles and programming, which aligns well with the curriculum of an MS in CS.

But first evaluate your career aspirations. If you're aiming for research, academia, or highly specialized roles, an MS in CS might be a good fit. If you're primarily interested in industry jobs, your MCA might already be sufficient.