No, i dont. I actually sleep very less ( up to 4 hours ) to be able to do everything that i have to do, online or offline.
Yes, when i was tired i just take some rest because when tired we cannot do any work with concentration.
I usually take six hour sleep which is quite sufficient and even after that when I feel sleepy than usually go for a short break and do some uncommon activity which is not usual for me and that makes me again energetic.
If you sleep on your desk frequently that proves your lack of interest while performing the task or you are too tired to work anymore. But i never sleep during my working hours.
I'm working in the customer service department, customers will keep pouring in so there is definitely no way for me to sleep.
great... you are a good man... I ever sleep when i was working, but it is just 2 minutes. hmmmm... it was so tired...