Asynchronous vs synchronous execution, what does i

Question

What is the difference between asynchronous and synchronous execution?

Answer 1

Synchronous Programming model – A thread is assigned to one task and starts working on it. Once the task completes then it is available for the next task. In this model, it cannot leave the executing task in mid to take up another task. Let’s discuss how this model works in single and multi-threaded environments.

Single Threaded – If we have couple of tasks to be worked on and the current system provides just a single thread, then tasks are assigned to the thread one by one. It can be pictorially depicted as

Multi-Threaded – In this environment, we used to have multiple threads which can take up these tasks and start working on that. It means we have a pool of threads (new threads can also be created based on the requirement and available resources) and bunch of tasks. So these thread can work on these as

Asynchronous Programming Model – In contrary to Synchronous programming model, here a thread once start executing a task it can hold it in mid, save the current state and start executing another task.

Single Threaded

Multi-Threaded

More here - https://codewala.net/2015/07/29/concurrency-vs-multi-threading-vs-asynchronous-programming-explained/

Answer 2

A synchronous operation does its work before returning to the caller.

An asynchronous operation does (most or all of) its work after returning to the caller.

Answer 3

Synchronous means queue way execution one by one task will be executed. Suppose there is only vehicle that need to be share among friend to reach their destination one by one vehicle will be share.
In asynchronous case each friend can get rented vehicle and reach its destination.