Question of pins on UNO R3

Using Arduino Project Guidance
#1

Are the two SCL and SDA pins with number 27 and 28 the same but located on both sides of the UNO R3 board?

Regards,
Mats

#2

zekeat:
Are the two SCL and SDA pins with number 27 and 28 the same but located on both sides of the UNO R3 board?

Regards,
Mats

Yes.

#3

Yes, A4/A5 on one side and SCL/SDA on the other side.

#4

Thank you!

#5