CPP Study Guide 2026
Everything you need to pass the CPP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CPP Exam Format at a Glance
📚 CPP Topics to Study (69)
✍️ Sample CPP Questions & Answers
1. What is a CMake `INTERFACE` library primarily used for?
An INTERFACE library has no compiled output but can carry properties like include paths and compile options that propagate to linking targets.
2. What is a key principle of performance optimization & profiling in C++ Programming Professional Certificate practice?
Performance Optimization & Profiling in C++ Programming Professional Certificate practice requires applying structured, evidence-based methodologies while adapting to specific professional contexts.
3. In C++20 modules, what is the effect of `export module mymodule;` at the top of a file?
export module mymodule; declares the file as mymodule's primary module interface unit, where exported declarations become visible to importers.
4. In a producer-consumer pattern using `std::atomic`, why might `memory_order_release` on the store and `memory_order_acquire` on the load be preferred over `memory_order_seq_cst`?
A release store paired with an acquire load establishes the necessary happens-before relationship at lower cost than `seq_cst`, which requires a global total order across all threads.
5. When the `explicit` keyword is applied to a conversion operator, what effect does it have?
An `explicit` conversion operator (e.g., `explicit operator bool()`) means the conversion only happens with a direct cast, preventing unintended implicit conversions.
6. What is the conventional return type for the copy assignment operator (operator=)?
The assignment operator should return `T&` (reference to *this) to support chaining such as `a = b = c`.