Also "τέρμα" could be used as the finish line of a 5K and "τερμάτισα" can be used for "I finished..."
What is the Greek for the "terminus", the last stop for a bus or tram? I find this phrase "Where is the end" rather odd, of a string, a problem, a road ?
"Where the end is" is not a question but a description of a place or something. For example: "look at right and you will see where the end is" (I am not a native English speaker, so i might be mistaken)