2. Message sent follows ________ in Inter Process Communication?     FIFO LIFOSISO

To determine the method that message sent follows in Inter Process Communication (IPC), we need to analyze the options provided.

1. FIFO (First In, First Out): This method means that the first message sent is the first one to be received. It is akin to a queue where messages are processed in the order they arrive.

2. LIFO (Last In, First Out): This method implies that the last message sent is the first one to be received. It resembles a stack where the most recently added message is the first to be processed.

3. SISO (Single Input, Single Output): This is a communication method where one sender communicates with one receiver.

Conclusion

In the context of Inter Process Communication, the most common method is FIFO (First In, First Out), as it ensures that messages are processed in the order they are sent, which is crucial for maintaining correct communication between processes.

Final Answer

Message sent follows FIFO in Inter Process Communication.