the timer will go off and will cause an interrupt to the operating system. A context switch will be executed, and the process will be put at the head of the ready queue, The CPU scheduler will then select the next process in the ready queue

the process itself will not release the CPU voluntarily. The scheduler will then proceed to the next process in the ready queue

The timer will go off and will cause an interrupt to the operating system. A context switch will be executed, and the process will be put at the tail of the ready queue, The CPU scheduler will then select the next process in the ready queue

the process itself will release the CPU voluntarily. The scheduler will then proceed to the next process in the ready queue