God I feel so stupid. I took the ICND on Thursday and failed with a 797. I didnt quite understand why, I thought I kicked some ass. I think I just figured out why I failed. This is pretty funny

I had 2 sims, Im not going to divulge on what, but i will say they both involved modifying/and or creating configurations on some devices, and then testing the results. I perfomed the requested criteria, and everything worked afterwards exactly as it should have, I had all my layer 2 and layer 3 connectivity and all frames and packets were doing what they were supposed to do.
I was just going throuh a preplogic quiz, and it asked me to configure an ip address on a serial interface, just an IP address, nothing more. Peice of cake, no sweat, I can do that in my sleep.
CCNA>enable
CCNA#Configure terminal
CCNA(config)#interface serial 0/0
CCNA(config-if)#ip address 192.168.1.100 255.255.255.0
CCNA(config-if)#no shutdown <
edited this, I typed it out wrong in the original post, this is how I did it on the sim for PrepLogic and Exam.
This what I typed exactly, and this is how I carried it out on my sims on the exam. Now before reading below, can anyone figure out what I did wrong? (answer below)
I didnt exit out of global config mode, let alone interface config mode.

If I could, I would be litteraly kicking myself in the ass right now! According to the PrepLogic exam, I got knocked like 50 percent for not exiting config mode, and rightly so. There went my pass!
Lesson learned