Final answer:
Deadlock occurs when multiple processes prevent each other from accessing the resources they need to execute, leading to a permanent standstill.
Step-by-step explanation:
The phenomenon being described is known as deadlock. Deadlock can be defined as the permanent blocking of a set of processes that either compete for system resources or communicate with each other.
It usually occurs in a computing environment when multiple processes prevent each other from accessing the resources they need to execute. This situation resembles a standoff in which no process can proceed because each process is waiting for one of the others to release a resource.
The concept of an isolated system in physics is related to this idea only in the sense that an isolated system does not interact with its surroundings, but in the context of a deadlock, the systems are not isolated because they do require interaction to function properly.
In stage performances, blocking refers to the movement and positions of actors, but it is planned and directed to ensure a successful performance, which is opposite to the unplanned and problematic nature of a deadlock. Finally, barriers to entry like legal and market forces can create situations where competition is limited, but this is in the context of economic markets, not computing processes.