How to enable USB debugging in Android?

Question

How do you enable USB debugging in the Nexus 7 (first generation)?

Edit: The accepted answer applies to other android devices also where Developer option is hidden .

Answer 1

do this

1) go to settings

2) go to developers setting

3) enable developers setting by turning the switch on top of the page.

4) select Usb Debugging.

Note: if developer option is not available then Tap 7 times on the build version button to unlock developer options...