Pointer or String?

What this C++ pointer and string syntax question tests

This is an easy C++ language-knowledge question that checks whether you understand the subtle distinction between pointers, arrays, and the behaviour of std::cout when given different types of arguments. It's the kind of question quant trading firms ask to verify that candidates have solid fundamentals before moving into systems-level or high-frequency trading code.

The question probes how C++ handles type coercion and operator overloading for output streams. When you pass different kinds of arguments to std::cout, the compiler selects different overloads based on type, and that choice determines whether the address of a variable is printed or its contents are. Understanding this distinction is crucial for debugging and for writing code that doesn't accidentally leak information or crash.

• Pointer types and address-of operator (&)
• Character arrays vs. character pointers
• Stream output operator overloads
• Type coercion and implicit conversions in C++