Race condition

is an undesirable situation that occurs when a device or system attempts to perform two or more operations at the same time, but because of the nature of the device or system, the operations must be done in the proper sequence in order to be done correctly.

A race condition occurs when two or more threads can access shared data and they try to change it at the same time. Because the thread scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data.

 Concurrency control 

database management systems (DBMS) concept that is used to address conflicts with the simultaneous accessing or altering of data that can occur with a multi-user system.
Concurrency control, when applied to a DBMS, is meant to coordinate simultaneous transactions while preserving data integrity.
The Concurrency is about to control the multi-user access of Database ...
purpose of concurrency control is to prevent two different users (or two different connections by the same user) from trying to update the same data at the same time......

Deadlock refers to a particular situation where two or more processes are each waiting for another to release a resource..
timestamping is a concurrency co

ntrol mechanism that eliminates deadlock....

 Program Counter

an incrementing counter that keeps track of the memory address of the instruction that is to be executed next.

 

 SNMP

Simple Network Management Protocol (SNMP) is an "Internet-standard protocol for managing devices on IP networks". Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks and more....

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