reddit · SideProject · 09-28 08:50 62 分 ← 返回列表

I built interview question banks where every answer is what the code actually printed

Most "what does this print" questions online are written from memory, and a surprising number are wrong on current versions. pandas 3 changed string dtypes and copy semantics, NumPy 2 changed how scalars display, and old answers keep circulating. So every snippet in my banks was run before its answer was written down. JavaScript on Node, Python on CPython in isolated mode, pandas 3.0.5, NumPy 2.4.4. For SQL, a query was only kept if SQLite and DuckDB returned exactly the same rows, so no qu

五维评分

付费意愿

需求真实度

个人可落地

竞争空间

新鲜度

AI 分析

痛点：在线面试题（如'这段代码输出什么'）多凭记忆编写，很多答案在当前版本（如 pandas 3、NumPy 2）下已错误，学习者被误导。

目标用户：准备 JavaScript、Python、SQL 等技术面试的开发者，尤其是需要刷题巩固语言细节的人。

证据：Most "what does this print" questions online are written from memory, and a surprising number are wrong on current versions. ... The full banks are PDFs, 9 euros each or 19 for JavaScript, Python and SQL together.

变现：出售 PDF 题库，单科 9 欧元，三科打包 19 欧元；可扩展为订阅制在线题库或企业培训。

MVP：用脚本自动运行代码片段并记录真实输出，生成静态网页，免费提供部分题目，付费解锁完整题库和 PDF 下载。2 周内可完成。

竞品：LeetCode、HackerRank、InterviewBit、GeeksforGeeks、各种面试题 PDF 合集

摘要：作者推出了一套面试题库，每道题的答案都是实际运行代码得到的输出，以解决网上答案过时或错误的问题。覆盖 JavaScript、Python、SQL、pandas、NumPy，单科 PDF 售价 9 欧元，三科打包 19 欧元。作者已用 Ko-fi 收款，但未透露销量。