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AP computer science AB exam

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Hi. I'm taking the AB AP computer science exam in may. I have a problem though; I can't seem to remember which is which; maps, trees, stacks, sets, queues, etc...I know what they are at this moment, but during a test sometimes I forget which is which. Do you guys have any tricks to remembering them? Also, has anybody here taken this exam? Do you have any suggestions on specific things to study?

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These structures are named exactly as what they are. A stack is a stack of objects where you can only use the top one. A queue is like when you're queueing up for something (to use British terms); the first person in the line gets served first. And so on.

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Practice using them in actual code. Stuff like that is easier to remember when you've used them in projects before. Then during the exam it'll be like, "Oh, I used that for _____, so I remember I used it because it does this specific thing with data.

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