For at least 4 questions out of my test I got “Failed” even though I did the exact same steps and followed all the requirements in each step and yielded the exact same result but I got failed nonetheless.
Why does it happen?
The grader is rather literal, but usually there is some small difference between the solution and what you actually did. Without knowing which test you did (or even which course!) I can’t tell you why your answers didn’t work. A link to the lab is needed for that 