technical questions about languages and asked me to code some very basic codes.

COMPUTER Networks for eg(ip address , internet, ram rom memory location , can a device has ip address ,database definition what is data etc) sql( inner joins query join 3 table , view definition) java(oops , multithreading , exception handling how many final we can have in one try catch , can we have multiple catch and try blocks, static keyword , finalize , diff between public and protected , static binding , late binding he has written code and asked whether it will work or not ) one pattern 1 22 333 4444