Which of the following statement is incorrect about priority queue?
1
An element with higher priority is processed before an element with a lower priority.
2
Two elements with the same priority are processed on a first-come-first-served (FCFS) basis.
3
The priority of the process may be set based on the CPU time it requires to get executed completely.
4
Priority queues are widely used in operating systems to execute the lowest priority process first.
5
All of the above