I'm concerned.

Design patterns and code structure recognition in C++

This is a medium-difficulty multiple-choice question that tests your ability to recognize and distinguish between common design patterns in C++ code. Rather than asking you to implement a pattern from scratch, it requires you to read existing code and identify which statement correctly characterizes its structure or intent.

Questions like this appear in quant interviews because solid pattern recognition is a practical skill: you need to understand codebases quickly, refactor without breaking things, and communicate design decisions clearly with colleagues. The question rewards familiarity with the Gang of Four patterns and the ability to reason about trade-offs between different structural approaches.

• Structural vs. creational vs. behavioral patterns
• Pattern intent and when to apply each
• Common implementation pitfalls and anti-patterns
• Code readability and maintainability