Here are some common Q-style abbreviations used in exams, along with my own method for remembering them:
QTH: A common term referring to direct memorization of an address location.
QSL: Very common to simply memorize; successfully receive and keep or indicate that a QSL card has been received (SL → Received).
QSO: This also indicates a successful connection.
Record both QRM and QRN together: Both are interference. RM → People → Human-caused (interference from another station), while RN → People → No human cause, so it is natural interference.
Remember QRP and QRO together: QRP stands for low power (which is also very common, so you can just remember that), while QRO stands for high power.
Record QRS and QRQ together: QRS (slow) slowing down, QRQ (quick) speeding up;
QRT: Stop transmitting, RT → return → function value returned indicates completion → finished;
QRU: Okay;
QRV: Receiving ready, RV → Ready recV;
QRZ: RZ → Who is calling (or who is calling your radio)?
QSB: Signal degradation, SB → decline → degradation;
QSD: The transmission was flawed; SD → hand injury → improper technique.
QSK: There was interference from another radio station in the gap, SK → tore it open → the gap could be opened again for insertion.
QSP: Please forward, SP → Send Please
QSY and QSV: QSX operates on a specific frequency (passive), while QSY involves switching to another frequency (active).
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