[Q] Another Rooting Question

The majority of my phones have been HTC so not really sure if unlocking the bootloader is normal procedure for a Motorola phone to obtain root. So i have a couple of questions on rooting this device, I'm happy to stay on a rooted stock so don't really see the point/need of unlocking the bootloader at this time.

1) Do you have to unlock the bootloader to root? or is there a method to root without unlocking the bootloader.

2) If the bootloader does get unlocked can it be relocked at a later date and would it show it had been unlocked?

Thanks in advance.