Answer 1

C++ is a object oriented programming language go through the course provide by sololearn if you face any difficulty then post that
https://www.sololearn.com/Course/CPlusPlus/?ref=app

The killer feature of C++ is scope-bound resource management, SBRM (more commonly known as "RAII"). It is the onlyindustrial programming language that is built around this concept. In C++, life times of all objects are exactly known, and (well-written) C++ programs guarantee that resources are acquired and released in fully deterministic manner. In comparison, garbage-collected or otherwise managed languages do not provide any such guarantees; in fact objects in those languages may persist after the end of their lifetime.

That is the reason why C++ is used in finance, video games, high-performance embedded and real-time systems, transportation, manufacture, and other industries where determinism and precision are important.