What is the primary difference between a std::mutex and a std::spinlock in C++ multi-threading?

What is multi-threading in C++?

A. A process that allows parallel execution of tasks

B. A process that allows a single thread to execute

C. A process that allows multiple processes to execute concurrently

D. A process that allows multiple threads to execute concurrently

Which header file is used for multi-threading in C++?

A. <mutex>

B. <condition_variable>

C. <thread>

D. <atomic>

What is the maximum number of threads that can run concurrently in C++?

A. 2

B. Depends on the hardware and operating system

C. 4

D. 8

What is the purpose of the 'std::thread' class in C++ multi-threading?

A. To define thread-specific data

B. To manage thread priorities

C. To create and manage threads

D. To synchronize access to shared resources