I am an undergrad in a local university (NUS).

I have gone for 2 internships and will be going for my next one with an MNC (General Electric) starting next month (December).

I have to be honest here: the search will be hard and the competition will be intense if you intend to go for MNC.
The main reason is because MNCs have to account to shareholders and so will be VERY selective in choosing their candidates.

Academic grades are a good start but MNCs look for a lot more than just grades. I’m saying this because I’m not exactly the ‘top performer’ in uni (I’m one tier below the top), but really it’s a lot about what you can offer the company (which has to be really special and niche for MNCs to want you) and how much you’re willing to learn (because the opportunities they offer is potentially endless).

Then again, even in the search process, especially at the start, I think the key is to have fun and accumulate experience - in terms of interview skills, academic knowledge in school and the ability to engage in deep discussions on real-world issues