What is the difference between uvm_callback and uvm_callbacks?

As a beginner i can’t understand difference between these two.

If you are a UVM beginner, I would highly recommend that you don’t worry about callbacks. You should focus on using the TLM aspects of UVM and keep to the basic fundamentals of UVM.

In reply to cgales:

Thanks cgales,
but i want to know what is the difference between them?