2018 MCQ

60/66

Q51: I didn’t really know what the difference between symetric and asymetric encryption was. Now I know, asymetric uses two seperate keys, while symetric encryptioon uses a single key.
Q47: Same as above, I didn’t know what asymetric or symetric encryption was. Safin helped me though, he told me this was an example of asymetric encryption, where anyone can use the public key and only the recipient with the private key can decrypt it.
Q43: Again I thought O(n^2) was unreasonable but it actually is reasonable.
Q42: I’m still not very good at binary stuff. If you added 96 bits then you have 2^96 times more possible combinations.
Q30: I can’t read. I didn’t see the extra analysis in the first line.

2020 MCQ

64/67
Q54: I didn’t think about the order that the numbers were put in.
Q45: I forgot that three 0s would also be winning in this case.
Q39: I didn’t look close enough at the code to realize that it adds i too soon.

2021 MCQ

68/70
Q63: I think I didn’t closely read the problem.
Q50: I forgot what symmetric encryption was and confused it with public key encryption.