Get Microsoft SDE Test Series which contains all CS subjects like OS, DBMS and CN alongwith complete DSA and contains online coding assessments with 4 mock Microsoft interviews.
You will have to use following promo code while buying the course and you will get all of it just at Rs 349
**PROMO CODE : GFGFSK8VH **
Course link : Courses | Microsoft SDE Preparation Test Series
Please buy the course. I bet you won’t regret. Especially if you are in 3rd or 4th year or even trying for placement in similar organizations