Design Alternating Card Dealing and Hand Comparison

Last updated: August 23, 2026

Quick Overview

Design a system that alternates card dealing between players and compares their hands to determine the winner. Implement two key functions: deal_card() for dealing cards and check_result() for evaluating the hands.

OpenAI
Software Engineering Fundamentals
Software Engineer
OpenAI
August 23, 2026
Software Engineer
Technical Screen
Software Engineering Fundamentals
Hard

5

0

89 solved


Design a system that alternates card dealing between players and compares their hands to determine the winner. Implement two key functions: deal_card() for dealing cards and check_result() for evaluating the hands.

This question is typically asked during the technical screening round to evaluate a candidate's understanding of software engineering fundamentals, particularly in object-oriented design and algorithm implementation. Interviewers are looking for the candidate's ability to break down a problem into manageable components, write clean and efficient code, and handle edge cases effectively.

What the Interviewer Expects
  • Clearly define the classes and methods needed for the card game.
  • Implement the deal_card() function to manage card distribution.
  • Create the check_result() function to evaluate the hands and determine the winner.
  • Discuss edge cases and how they will be handled.
  • Provide a clear explanation of the design choices made.
Key Topics to Cover
Object-Oriented Design
Algorithm Implementation
Card Game Logic
Edge Case Handling
Code Efficiency
How to Approach This
  1. Apply SOLID principles. Single Responsibility makes code testable, Open/Closed makes it extensible.
  2. Choose data structures based on access patterns, not familiarity.
  3. Prefer immutable data and message passing over shared mutable state for concurrency.
  4. Design APIs with RESTful conventions, versioning, meaningful errors, and pagination from day one.
Possible Follow-up Questions
  • How would you modify your design for a different number of players?
  • What data structures did you choose and why?
  • Can you explain how you would handle ties in the game?
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Practice System Design Problems
Sample Answer
Requirements

To design a card dealing and hand comparison system, we need to define the following requirements:

  1. The system should support multiple players.
  2. Each player should receive a specific number of car...
High-Level Design

We can structure the system using the following classes:

  • Card: Represents a single card with a suit and rank.
  • Deck: Manages a collection of cards and provides methods to shuffle and deal c...

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