The process followed in order to find difficult, unknown and hidden information about a software system is called:

Correct option is C

Reverse engineering is the process of analyzing a software system to identify its components and their relationships without having prior access to the source code or documentation. It is primarily used to retrieve obscure or hidden information, especially in legacy systems or third-party software, and helps in understanding the structure, behavior and functionality of the system. Therefore, the correct term for identifying unknown and difficult-to-find details in a software system is Reverse Engineering.
Information Booster:
1. Reverse Engineering:
· Involves deconstructing a software application to understand its design and implementation.
· Helps uncover undocumented features, hidden dependencies and security loopholes.
· Often used for software analysis, debugging and legacy system maintenance.
Additional Knowledge:
· Software Engineering: A systematic approach to the design, development, operation and maintenance of software systems. It is forward-looking, not meant for uncovering unknown internal details.
· Software Re-Engineering: Focuses on improving and updating existing software systems by restructuring or rewriting parts of it. It assumes access to the source code and documentation.
· Inverse Engineering: Not a standard term in software development. Often confused with reverse engineering but not formally recognized in software engineering contexts.