Most coding/programming job interviews are more about how you think than what esoteric libraries you've leveraged. Back when I was a "pro" (pre-brain damage) I always used to tell employers that "I know a lot about a few things, a little about a lot of things, and google makes up the rest." Meaning you can always look up a library... but you can't reference a different logical thought flow.
So I don't know anything about your bootcamp or this test you are taking so anything I say is based on assumption only... but where you are possibly failing might be in the creativity/application portion. IE. Practical application of theory. I've known a number of people who made it all the way through a bachelors in something like computer science without ever learning HOW to apply all the crap they memorized.