Vibe codingMediumvc-g488

Subject Ai verificationLevel Mid–Senior~16 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

An AI agent wrote a Java method `mergeIntervals(int[][] intervals)` that merges overlapping intervals and returns the merged set. The example in the docstring works. You want to verify it with a small, sharp set of inputs rather than reading the sort-and-merge loop. Which inputs do you choose to expose a likely bug?

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts

Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.