Coroutines - Just a clarification

[khadija-km1704338]

Are "Background Thread" considered asynchronous? or they are synchronous? Can you please clarify a bit?
Thank you!

[erradi]

Background Thread is a thread to execute tasks and it can be used to avoid blocking the main thread.
Synchronous function is blocking function -> when called the caller must block and wait to get the result.
Asynchronous function in NON-blocking function -> Caller does not have to wait after calling the function
Asynchronous function can be executed in a background thread when it completes execution it can call back the caller.