sizeof your comprehension

What this C++ memory-layout question tests

This is a medium-difficulty question that probes your understanding of how the C++ compiler lays out data in memory—a foundational skill for systems programming and performance-sensitive roles at trading firms. It asks you to reason about object size and alignment without running code, which is exactly what interviewers value in a live setting.

To solve problems like this, you need to understand padding, alignment requirements, and how the compiler organizes struct and class members. Small details matter: the order of member declarations, whether you're dealing with primitive types or nested structures, and how C++ standards (in this case C++14 or later) influence layout rules. These concepts directly impact cache efficiency, serialization, and network protocol implementations.

• Struct and class member alignment
• Padding and compiler layout strategies
• The sizeof operator and its guarantees
• Platform-specific size differences