Some well-known OOPS, OS, and DBMS questions will undoubtedly help those taking Placement 2023 or after that. All of the questions I’ve listed were asked to me personally during my Reliance-JIO interview.
OOPS->
- Difference between abstract class and interface?
- How many pillars of OOPS are there?
- What is polymorphism?
- How to achieve multiple inheritance? (I was using JAVA)
- What are classes and objects? (Real world example will be useful)
OS->
- Difference between Process and Thread?
- What is a Deadlock and how to prevent that? (Synchronization-Semaphore-Mutex. Read about this as well; simply understanding the application of these concepts is sufficient.)
- Difference between Paging and Segmentation?
- What is Fragmentation and how it occurs?
- What is Virtual Memory? (You should know paging concepts and also give some real-world examples I used a GTA5 example 🙂 )
DBMS->
- Difference between SQL and NoSQL Database?
- Difference between Horizontal and Vertical Scaling?
- What exactly is a transaction, and what are the ACID properties?
- What is Clustering, Partitioning and Sharding?
- What is Tier2 and Tier3 architecture in DBMS?
These questions were mostly directed at me during my placement interviews. These are important questions to understand. You can still have ‘N’ questions, but I’m not talking about that because it depends on your preparation.
Ask your doubts If you have any, I will try to share any resources, tips, or help that I can. Until then, work hard, get placed and party harder.????