Which of the following commands can be issued on your linux EC2 Instance to get the public IP of the instance while it is in the running state

Answer options:

A.curl http://254.169.254.169/latest/meta-data/public-ipv4
B.curl http://127.0.0.1/latest/meta-data/public-ipv4
C.curl http://169.254.169.254/latest/meta-data/public-ipv4
D.curl http://10.0.1.0/latest/meta-data/public-ipv4

Answer – C
The URL: for Instance metadata is
http://169.254.169.254/latest/meta-data/
The different properties that can be retrieved via the Instance metadata is
ami-id
ami-launch-index
ami-manifest-path
block-device-mapping/
hostname
iam/
instance-action
instance-id
instance-type
local-hostname
local-ipv4
mac
metrics/
network/
placement/
profile
public-hostname
public-ipv4
public-keys/
reservation-id
security-groups
services/
For more information on Instance metadata, please visit the below URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html