If only one process may run Critical Region at a time, what does it mean?

If two states of process execution are 'Running' and 'Ready', the third is Sleeping Blocked In-Transition Signaled

Draw a process model in BPMN describing a covid QR check-in process. The process model you will develop must involve no less than 8 tasks/activities and no less than 2 gateways (of which at least one must be an XOR-split and one must be an AND-split), and at least 2 lanes, 2 pools and 2 intermediate events.

Explain that how many processes can be in the run state at the same time?

How are semaphores used to ensure there is mutual exclusion in multi process systems

In the transition from batch processing to serial processing, which factors should be given the greatest amount of consideration?It is important that you provide an explanation for your answer.

To what extent does a smooth transition from batch to serial processing need to be ensured?Your answer must include an explanation.

In your opinion, what is the most crucial consideration when switching from batch processing to serial processing?Your answer must include an argument or explanation.

In what ways does it become necessary to guarantee a seamless shift from batch processing to serial processing?Your response is required to come with an explanation.

What is the concept of a deadlock-free state, and how can it be achieved in a multi-process environment?