Using the given the link "https://restful-booker.herokuapp.com/ping " I am trying to ping the server to check the A simple health check endpoint to confirm whether the API is up and running. But I can see that the return response is Status 404. Please help me understand if there is any thing missing.
Welcome to the Postman Community! 
This is working for me:
From you question, it looks like there is an extra space on the end of the URL which would cause a 404, so i would check that on your side:
Aww Snap !! now it is working @danny-dainton thanks for the Godspeed reply.
Glad to help out! Happy testing! 