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Variables, data types, operators, control flow, arrays, pointers basics, references, I/O streams, and preprocessor directives.

Classes, objects, constructors, destructors, inheritance, polymorphism, virtual functions, abstract classes, access specifiers, and friend functions.

vector, map, set, string, iterators, algorithms, deque, stack, queue, priority_queue, and unordered_map.

new/delete, smart pointers (unique_ptr, shared_ptr, weak_ptr), RAII, memory leaks, stack vs heap, and move semantics.

auto, range-based for, lambda, constexpr, structured bindings, std::optional, concepts, coroutines, and modules.

Function templates, class templates, SFINAE, template specialization, variadic templates, type traits, operator overloading, and exceptions.