What is difference between sleep() method and yield() method of multi threading?

Question

As currently executing thread while it encounters the call sleep() then thread moves immediately into sleeping stat. Whereas for yield() thread moves into runnable

Answer 1

Both methods are used to prevent thread execution. But specifically, sleep(): purpose:if a thread don't want to perform any operation for particular amount of time then we should go for sleep().for e.x. slide show . yield(): purpose:if a thread wants to pause it's execution to give chance of execution to another waiting threads of same priority.thread which requires more execution time should call yield() in between execution.

Note:some platform may not provide proper support for yield() . because underlying system may not provide support for preemptive scheduling.moreover yield() is native method.