___ is to size_t

Understanding pointer-arithmetic types in C++

This is a medium-difficulty C++ language-knowledge question that tests whether you understand the relationship between signed and unsigned integer types used in low-level programming. It probes your familiarity with the standard library's pointer and size-related types, which are essential when working with memory layout, array indexing, and performance-critical code.

The question asks you to reason by analogy: given one pair of related types, identify the corresponding pair that maintains the same structural relationship. Success requires understanding the purpose and scope of each type—specifically, which types are designed for representing memory addresses and offsets, and how signed and unsigned variants relate to one another. This kind of knowledge is particularly relevant in systems programming, high-frequency trading systems, and any codebase where direct memory manipulation or cross-platform portability matters.

• Signed vs. unsigned integer semantics
• Platform-independent size and pointer representation
• Type aliasing in the C++ standard library