Locking
This occurs when a session takes ownership of an object by acquiring a lock on the resource
Blocking
This happens when a session is trying to acquire a lock on a resource which is already locked by an another session. Since the resource is already locked, the session is blocked to acquire the resource until the previous session releases the lock.
If the above blocking process is also blocked by another process and that process is also blocked by above blocked process, It will lead to a dead-lock situation where once process need to be terminated by force.
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