Which IPC model is fastest because communication does not require kernel intervention after the setup phase?
Option A is correct. In Shared Memory IPC, processes exchange data by reading/writing to a common memory region without kernel involvement during routine transfers.
In Message Passing IPC, when a send() operation blocks the sender until the message is received by the destination, it is classified as:
Option B is correct. Synchronous or Blocking message passing creates a rendezvous between sender and receiver; send() blocks until receive() completes.
What UNIX system call is used to create an anonymous unidirectional data channel for inter-process communication between related processes?
Option C is correct. The pipe() system call creates a unidirectional IPC data channel (read descriptor and write descriptor) used between parent and child processes.
In Linux/UNIX systems, what is a named pipe that can be used for IPC between unrelated processes called?
Option C is correct. A FIFO (Named Pipe) exists as a file system node and allows communication between unrelated processes on the same host.
What mechanism is used by an operating system to notify a process of an asynchronous event, such as SIGINT or SIGKILL?
Option A is correct. Signals are software interrupts sent by the OS to a process to inform it of asynchronous events (e.g., Ctrl+C sends SIGINT).