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Vibe codingHardvc-g042
Subject Ai code reviewLevel Senior–Staff~19 minCommon in Networking & APIs interviewsIndustries Software development, Technology

Question

An AI assistant wrote this Java retry wrapper around an idempotent remote call, using exponential backoff:

java
public <T> T withRetry(Callable<T> op, int maxAttempts) throws Exception {    for (int attempt = 1; attempt <= maxAttempts; attempt++) {        try {            return op.call();        } catch (Exception e) {            Thread.sleep((long) Math.pow(2, attempt) * 1000);        }    }    return null;}

It retries and eventually succeeds in a flaky test. What are the contract and correctness problems a staff reviewer flags?

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.