C++ constructors: which constructor is specifically designed to copy one object from another object of the same class type?

Introduction / Context:
Copying semantics determine how values propagate and how resources are duplicated or shared. C++ recognizes a special member function that initializes a new object from an existing one of the same type. Knowing its name and role helps you reason about value semantics and ownership policies (rule of three/five/zero).

Given Data / Assumptions:

• We are creating a new object from an existing object.
• Syntax examples: T b = a; or T b(a);
• We are not assigning to an already-initialized object (that would be copy assignment).

Concept / Approach:

The copy constructor has the conventional signature T(const T&). It runs when a new object is constructed from another, including function parameter passing by value and function return by value (subject to elision/moves). A “dynamic constructor” is a colloquial phrase sometimes used for constructors that allocate resources; it is not a standard term. “Create constructor” and “Object constructor” are not C++ terms of art.

Step-by-Step Solution:

Verification / Alternative check:

Delete or make private the copy constructor and observe that copy-initialization fails, proving it is the mechanism used by the compiler for such constructions. Implementing a move constructor changes behavior for rvalues but not lvalue copies.

Why Other Options Are Wrong:

Create/Object constructor: non-standard labels.

Dynamic constructor: vague; not the standardized name for copying.

Common Pitfalls:

• Confusing copy construction with copy assignment.
• Neglecting deep-copy needs for owning pointers; prefer smart pointers or rule-of-zero designs.

Final Answer:

Copy constructor