retail, devices, and AWS
Amazon coding / dsa practice is one slice of a 50-prompt set. Restate the input, name a brute-force baseline, then improve it. Say time and space before you claim you are done. Write the principle in the margin of the story before you practice it. If the story does not need that principle, pick another story.
Practice these prompts with an AI interview copilot, or download Luna for Chrome, Mac, and Windows.
Coding / DSA
Commonly reported
How to approach. Repeat the input and output in your own words, then give the naive cost. Only then reach for a better structure for inventory reservation ids.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Write the invariant on the side before the loop. Amazon rounds go better when the interviewer can see what stays true.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Dry-run three cases: empty, one element, and the boundary you are afraid of. Talk while you do it.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Name the search or traversal and the reason. If you switch approaches, say what the first one failed to handle.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. If new data arrives while you iterate, say whether you snapshot or follow updates. Pick one and stick to it.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. For a running aggregate, say the window, the update cost, and what you evict. A diagram of two structures is enough.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Explain the key you hash and what a collision means for this data. Do not jump to library names.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Start greedy, then show one input where greedy is wrong if it is wrong. That correction is the answer.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Narrate the low and high bounds before the first iteration. Off-by-one is the usual miss on rotated data.
Practice this with LunaCoding / DSA
Commonly reported
How to approach. Define the identity you rate-limit, the clock, and the response when the budget is spent. Test the exact boundary.
Practice this with LunaThese passed review. The date is when the candidate submitted the report.
Tell us the company, the role, the round, and the question in your own words. Submissions stay pending until a reviewer approves them. Approved prompts can show a Reported by candidates badge. If you leave an email, we can match an affiliate reward — the program pays 30% commission.