Pointer-Owning Lambda

What this C++ lambda and pointer-ownership question tests

This is a medium-difficulty C++ language-knowledge question that probes your understanding of how lambdas capture pointers and manage lifetime semantics. It's the kind of problem that catches candidates who assume familiar patterns from other languages without accounting for C++'s strict ownership rules.

To reason through questions like this, you need to think carefully about what a lambda actually captures when you write code involving pointers, how the captured values persist or dangle, and what the semantics of the capture clause really mean in memory. The question rewards precision about scope, lifetime, and dereferencing—skills that matter when writing correct, crash-free code in production systems.

• Lambda capture mechanisms (by value, by reference, by pointer)
• Pointer lifetime and dangling references
• Undefined behaviour vs. well-defined semantics
• Memory safety in functional-style C++