Sir,
    Lots of Thanks for the previous answers.I have the following queries regarding Process Synchronization in Distributed System.
    1.As we know that there is absence of a Global Clock in Distributed System then how implementation of timestamps is done in such systems?
    2.How each process in a Distributed System gets to know about its neighbours to create it's Process queue?
    3.How Mutual Exclusion is practically achieved in a Distributed System?

Regards...
Sanjeeb