All standard OOPS questions like polymorphism, its types encapsulation, abstraction etc. was asked..They tested deep knowledge for OOPS and judges your undeerstanding of the concepts. i wasn't asked any OS questions. in DBMS, the discussion started from PostgreSQL, as i used it in one of my previous internships and later shifted to firebase/firestore and mongoDB as i used them in my projects. They asked questions around the working of the databse, indexing in it, how google authentication works through firebase etc.
