Question: what are the five classification of operating systems?
Answer: i) Multiuser OS: In a multiuser OS, more than one user can use the same system at a same time through the multi I/O terminal or through the network. ...  ii) Multiprocessing OS: ...  iii) Multiprogramming OS: ...  iv) Multitasking OS: ...  v) Multithreading: ...  vi) Batch Processing: ...  vii) Online Processing: