Answer 1

In an asynchronous process, one activity sends a message to another, but does not wait until it gets a response. A phone call to another person is a synchronous process - it can't go forward if the person you want to talk to doesn't answer the phone. Leaving a message on an answering machine turns it into an asynchronous process. You leave your message and go on with your business, figuring the person will respond when they get the message.

Answer 2

In an asynchronous process, one activity sends a message to another, but does not wait until it gets a response.