-What is iops? -What is meant by MTU? -What is the maximum size of the packet that goes through the network? -Can I increase the size of a packet? -How can I increase window size? -What happen if I increase the packet size more than the MTU? -Tell me 10 parameters of kernel? -What is nproc? -How many processes I can run in a single core CPU? -What do you know about systemcalls? -Have you seen any critical thread that impacts entire infra? -what is fork? -Have you faced any issue with fork in kernel? -Have you seen any system where due to zombie process there is an issue with the server? -What issues have you face during kernel upgrade? -Why the client is not able to connect to the server, and there is no issue with the CPU or the memory? -How do you upgrade the server? -What is the use of load balancer in a server? -tell me all the issues you faced during kernel upgrade? -What challenges have you seen during migration, from on prem to cloud? -what will you do if a server is down and the client was running a very critical application which is impacting entire team? -Have you seen any issue with the storage? How did you troubleshoot? -How will you fix storage issue permanently? Or I want to fix it for at least 3-4 years? -Why do we use swap? -Have you performed backup for OS? -How to test whether the backup is properly made? -How do you check if a backup is working fine? -How do you check if there is an issue with the Block device? -Have you performed NIC bonding? -What is the use of Bonding? -Storage is not working how will you troubleshoot? -What is link aggregation? How do we configure it?