Dead links

I found these urls on https://codingblocks.com which either return 404 or 500 error. These should be corrected or removed.
- https://online.codingblocks.com/courses/coding-interview-preparation-course-online<-->404
- https://play.google.com/store/apps/details?id=com.gamershq.FlyingModi<-->404
- https://online.codingblocks.com/courses/angular-node-js<-->500
- https://online.codingblocks.com/courses/coding-interview-preparation-online#runs<-->500
- https://online.codingblocks.com/courses/deep-learning-neural-networks<-->404
- https://play.google.com/store/apps/details?id=in.tosc.digitaloceanapp<-->404
- https://codingblocks.com/bootcamps/coding-interview-preparation.html#java-bundle<-->404
- https://codingblocks.com/bootcamps/coding-interview-preparation.html#cpp-bundle<-->404
i am testing my urlscanner tool and have verified that these links do not work.

首先在網站原始碼中定位列出的八個 URL，並使用回報的 404 或 500 回應逐一驗證。所有列出的連結都已修正或移除，且 URL 掃描器不再回報這些故障，即表示完成。

由索引模型根據 Issue 內容生成。