Which term refers to a process that can be woken by a signal immediately?

The term that refers to a process that can be woken by a signal immediately is "interruptible sleep." When a process is in interruptible sleep, it is in a waiting state but can be awakened by signals or certain events, making it responsive to external conditions. This state allows the process to be stopped and then resumed upon receiving the specific signal it is waiting for, such as an I/O operation completing or a user input.

In contrast, processes in uninterruptible sleep cannot be woken up by signals. This state occurs when a process is waiting on a resource that is not immediately available, such as disk I/O, and typically indicates that the process is in a critical state. The zombie state refers to a completed process that still has an entry in the process table, retained for the parent process to read its exit status. Lastly, a paused state typically involves a process having its execution temporarily halted, but it is not specified in the same context as the sleeping states.