I had a few disagreements with some of the quiz answers:
For the dot product one (#3 on mine)...isn't the last choice (sum of Xi * Yi) not necessarily true upon entrance? i = 0, a = 0, but it seems that X0 and Y0 aren't necessarily zero, so X0 * Y0 isn't necessarily a, or 0.
For the # of local references to Node objects (#4)....is str2 technically still a reference to a Node object? It CAN reference a Node object because it's TYPE is Node...but it seems that it doesn't reference ANY object (maybe the wording of the question threw me, I read as how many references at the end of the method)
For #8...The quiz no longer lists the options for multiple choice answers, but I recall one of the answers it said was correct said something like "there are five equivalence classes after step :something:" and I kept getting a different # (4, maybe?)
Finally, for #9..the question mentions "the data structure introduced in class" but it doesn't say which implementation. For the tree representation, doesn't find take as long as its depth in the tree?
Most of these are probably misunderstandings...if so, could someone please explain the errors in my reasoning? |