1G/10G interfaces, which do we configure?

[erase startup reload]

I have a prod switch that has 4 SFP+ interfaces, 1G/10G. We have a single 10G SFP slotted currently. If I want to configure a 1G interface, do I use the gigethe command or do I still use the tengigethe command?

Example:
conf t

  int gi1/1/1

OR

conf t

  int te1/1/1

Gi1/1/1 admin down down
Gi1/1/2 admin down down
Gi1/1/3 admin down down
Gi1/1/4 admin down down
Te1/1/1 admin down down
Te1/1/2 admin down down
Te1/1/3 admin down down
Te1/1/4 up                up

Current configuration : 48 bytes
!
interface GigabitEthernet1/1/4
shutdown
end

Current configuration : 375 bytes
!
interface TenGigabitEthernet1/1/4
description nonya
no switchport
ip address 
ip pim sparse-mode
ip ospf network point-to-point
ip ospf bfd
auto qos trust dscp
bfd interval 300 min_rx 300 multiplier 3
service-policy input AutoQos-4.0-Trust-Dscp-Input-Policy
service-policy output AutoQos-4.0-Output-Policy
end

What would happen if I tried to apply config to gi1/1/4? Would the switch let me?

Would I cause problems because it's the same physical interface as te1/1/4? 

If I applied config to gi1/1/4, would it stay there and if I swapped the SFP to 1G, then the gi1/1/4 commands would take over?

No lab devices to test. 

Switch:  cisco WS-C3850-24P

Code:   16.12.3a

[Reza Sharifi]

If the SFP you are inserting into the slot is 1Gig, then you have to use one of these ports:

Gi1/1/1 admin down down
Gi1/1/2 admin down down
Gi1/1/3 admin down down
Gi1/1/4 admin down down

HTH

[balaji.bandi]

configuration accepts that port, but not going to work , so you need to use right port based on the requirement

[Leo Laohoo]

The switch is on 16.12.X, so put the port configuration in both the Gi and the Te port.  

It is a known bug.