Final answer:
Preemptible VMs are suitable for batch jobs that can be checkpointed and restarted, while they are not suitable for batch jobs that cannot be checkpointed. They are also not suitable for interactive websites or online relational databases.
Step-by-step explanation:
Preemptible VMs are suitable for running applications that can be checkpointed and restarted, such as a batch job that needs to be saved at specific intervals. With a preemptible VM, you can set up checkpoints to save the progress of a job, allowing it to be restarted from where it left off if it is preempted.
On the other hand, an application that cannot be checkpointed and restarted would not be suitable for running in a preemptible VM. This includes a batch job that cannot be saved and resumed at specific intervals.
An interactive website or an online relational database would also not be suitable for running in a preemptible VM because they require continuous availability and cannot afford to be preempted.