If an e-commerce site was put into a live environment and the programmers failed to remove the secret entry point that was used during the application development, what is this secret entry point…

The SDLC (Software Development Life Cycle) is a project management and development methodology framework, not a type of entry point or vulnerability.

A honeypot is a deliberately exposed decoy system used to detect or study attackers, not a developer-created hidden access mechanism.

SQL injection is an attack technique that manipulates database queries through unsanitized input, not a secret entry point built into application code.

A trap door - also called a backdoor - is a hidden mechanism built into software by developers to allow direct access, bypassing normal security controls. When programmers forget to remove it before deploying to a live environment, it becomes a serious vulnerability that attackers can discover and exploit. It is specifically characterized by being an intentional, concealed entry point embedded in the application code.