5.1.0 What is concurrency(5/5 Table 5.1 Some Key Terms Related to Concurrency atomic operation A sequence of one or more statements that appears to be indivisible; that is, no other process can see an intermediate state or interrupt the operation critical section a section of code within a process that requires access to shared resources and that must not be executed while another process is in a corresponding section of code deadlock A situation in which two or more processes are unable to proceed because each is waiting for one of the others to do something livelock A situation in which two or more processes continuously change their states in response to changes in the other process(es) without doing any useful work mutual exclusion The requirement that when one process is in a critical section that accesses shared resources, no other process may be in a critical section that accesses any of those shared resources. race condition A situation in which multiple threads or processes read and write a shared data item and the final result depends on the relative timing of their execution starvation A situation in which a runnable process is overlooked indefinitely by the scheduler; although it is able to proceed, it is never chosen8 5.1.0 What is concurrency(5/5)