Description
C++ Overview for Experienced Candidates
- C++ is a general-purpose, high-performance language that blends low-level control with high-level abstractions.
- It was created by Bjarne Stroustrup as an extension of C and introduced object‑oriented programming while preserving direct memory manipulation.
- Syntax and core concepts: types, pointers/references, RAII, deterministic destructors, and manual memory management.
- Standard Template Library (STL) provides containers, iterators, algorithms, and function objects that form the backbone of idiomatic C++ code.
- OOP fundamentals: classes, encapsulation, inheritance, polymorphism, virtual functions, and design patterns for large systems.
- Resource management: smart pointers, move semantics, and ownership models to avoid leaks and undefined behavior.
- Templates enable generic programming; template specialization and SFINAE power reusable, type-safe libraries.
- Modern idioms: RAII, Pimpl, rule of five/zero, and value semantics for robust API design.
- Performance engineering: zero-cost abstractions, inlining, cache-aware data structures, and careful use of dynamic allocation.
- Language evolution: C++11/14/17/20/23 added lambdas, move semantics, constexpr, structured bindings, ranges, concepts, and modules.
- Concurrency and parallelism: std::thread, atomics, futures/promises, and parallel algorithms for multicore scaling.
- Metaprogramming: compile-time computation with constexpr, template metaprogramming, and type traits for high-performance libraries.
- Advanced type system: variadic templates, type deduction, decltype, and Concepts for clearer generic constraints.
- Tooling and ecosystem: build systems (CMake), sanitizers, static analyzers, and package managers improve reliability and delivery.
- Interfacing and systems work: ABI considerations, FFI with C, embedded programming, and OS-level APIs for systems engineers.
- Modern features for expressive code: coroutines, modules, ranges, and improved constexpr enable safer, faster abstractions.
- Career focus: emphasize clean API design, performance profiling, concurrency correctness, and keeping up with the evolving standard and best practices.
