How do I approach Software Engineering Fundamentals interview questions?

Software Engineering Fundamentals questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master software engineering fundamentals interviews.

What difficulty level is this interview question?

This is a medium difficulty Software Engineering Fundamentals question, commonly asked during Technical Screen rounds at Intercontinental Exchange.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Intercontinental Exchange during technical interviews.

Explain Vector, Linked List, and Polymorphism

Last updated: Apr 2, 2026

Quick Overview

This question evaluates competency in C++ data structures and object-oriented polymorphism, testing understanding of dynamic array versus linked-list memory layouts, random access and insertion/deletion performance, cache locality, iterator invalidation, typical use cases, and distinctions between compile-time and runtime polymorphism including overloading, templates, inheritance, and virtual functions. It is commonly asked in software engineering fundamentals interviews to assess reasoning about performance and design trade-offs in C++ systems code; the domain is C++ programming, data structures, and OOP, and the level of abstraction spans both conceptual understanding and practical application.

Intercontinental Exchange

Feb 17, 2026, 12:00 AM

Software Engineer

Technical Screen

Software Engineering Fundamentals

In a C++ interview, explain the differences between a dynamic array container such as std::vector and a linked-list-based container such as std::list.

Your answer should cover:

Memory layout
Random access performance
Insertion and deletion trade-offs
Cache locality
Iterator invalidation
Typical use cases

Also explain what polymorphism means in C++, including:

The difference between compile-time and runtime polymorphism
How function overloading, templates, inheritance, and virtual functions relate to polymorphism
When dynamic dispatch is useful in practice

Solution

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