Asynchronous I/O
Asynchronous I/O is a technique to handle I/O operations without blocking the process. In other words, asynchronous I/O performs an operation on some data or resource and returns immediately without waiting for a response from another system. It’s used when the user wants to perform an operation that does not need constant interaction with your application, but the user still wants it done as soon as possible (e.g., printing something out). This approach allows more flexibility in program flow since it allows users to work with multiple threads at once and avoid deadlocks between them.
Asynchronous I/O can also be used for network communication since it provides better performance than synchronous IO (blocking IO), but there are some restrictions on how this needs to be implemented:
Users cannot use asynchronous reads or write if any other part of your application depends on them having completed before moving on to another task; otherwise, this could cause issues later down the line when running under load conditions!
Blocking and Nonblocking IO in Operating System
Blocking and non-blocking IO are two different methods used by OS to handle I/O operations. A blocking call is where the OS decides that it needs to wait for a certain operation to complete before allowing the program to continue execution. The result of this is that user can’t do anything else while waiting on a system call; if your program doesn’t have any other activity, then it should be able to wait indefinitely without causing any problems. On the other hand, non-blocking calls (also known as asynchronous operations) don’t block the thread until they finish their work; instead, this type of system call returns immediately after completing its job without having any effect on what’s happening in other threads.