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| 1 | +```md |
| 2 | +# AI-Native Interview Challenge: AI/ML Engineer |
| 3 | + |
| 4 | +## Overview |
| 5 | + |
| 6 | +This challenge involves designing and implementing a mobile-based machine learning model to provide real-time sentiment analysis of user reviews. This task will test your ability to develop AI/ML solutions that can operate effectively in a mobile environment. |
| 7 | + |
| 8 | +### Context |
| 9 | + |
| 10 | +You are part of a team developing a cross-platform application that needs to work consistently across web, mobile, and desktop environments. One of the key features of this application is a real-time sentiment analysis tool that provides immediate feedback on user reviews. |
| 11 | + |
| 12 | +### Challenge Parameters |
| 13 | +- **AI Maturity Level:** Expert |
| 14 | +- **Format:** Take-home Challenge |
| 15 | +- **Time Limit:** 8 Hours |
| 16 | +- **AI Tools Allowed:** No |
| 17 | +- **Team AI Fluency:** Familiar |
| 18 | + |
| 19 | +## Challenge Description |
| 20 | + |
| 21 | +Design and implement a machine learning model that performs sentiment analysis on user reviews in real time. The model should be lightweight enough to run on mobile devices and should be able to handle a high volume of reviews. |
| 22 | + |
| 23 | +The key tasks include: |
| 24 | + |
| 25 | +1. Preprocessing and transforming the review data for model training. |
| 26 | +2. Creating a machine learning model that can accurately classify the sentiment of a review as positive, negative, or neutral. |
| 27 | +3. Implementing the model in a mobile environment, ensuring it can perform in real time. |
| 28 | +4. Setting up a monitoring system to track the model's performance over time. |
| 29 | + |
| 30 | +## Implementation Requirements |
| 31 | + |
| 32 | +- Use a mobile-compatible machine learning framework. |
| 33 | +- Implement an appropriate data preprocessing pipeline. |
| 34 | +- Ensure the model can handle a high volume of reviews in real time. |
| 35 | +- Set up a system to monitor model performance. |
| 36 | +- Write clean, maintainable, and well-documented code. |
| 37 | + |
| 38 | +## Evaluation Rubric |
| 39 | + |
| 40 | +### Technical Implementation (40%) |
| 41 | +- **Excellent (35-40)**: Complete implementation with advanced features like efficient data processing, highly accurate model, and comprehensive monitoring system. Code is exceptionally clean, well-structured, and follows best practices. |
| 42 | +- **Good (25-34)**: Solid implementation with all core features working well. Code is clean, well-organized, and follows good practices. |
| 43 | +- **Satisfactory (15-24)**: Basic implementation with core functionality working. Some areas could be improved for cleaner code or better organization. |
| 44 | +- **Needs Improvement (0-14)**: Incomplete implementation or significant issues with core functionality. Code structure and organization need substantial improvement. |
| 45 | + |
| 46 | +### AI/ML Design & Workflow (30%) |
| 47 | +- **Excellent (25-30)**: Sophisticated AI/ML design that delivers high performance. Demonstrates deep understanding of AI/ML principles and shows evidence of effective strategy in model design, training, and implementation. |
| 48 | +- **Good (18-24)**: Effective AI/ML design that delivers good performance. Shows understanding of AI/ML principles and effective strategy in model design, training, and implementation. |
| 49 | +- **Satisfactory (10-17)**: Basic AI/ML design that delivers satisfactory performance. Some understanding of AI/ML principles and basic strategy in model design, training, and implementation. |
| 50 | +- **Needs Improvement (0-9)**: Ineffective AI/ML design or over-reliance on default settings without understanding. Code shows signs of lack of understanding of AI/ML principles and ineffective strategy in model design, training, and implementation. |
| 51 | + |
| 52 | +### Communication & Documentation (30%) |
| 53 | +- **Excellent (25-30)**: Exceptional documentation explaining design decisions, data preprocessing, model architecture, and monitoring strategy. Includes detailed README, inline comments where appropriate, and clear commit messages. |
| 54 | +- **Good (18-24)**: Good documentation with clear README and explanation of major design decisions. Some discussion of data preprocessing, model architecture, and monitoring strategy. |
| 55 | +- **Satisfactory (10-17)**: Basic documentation that covers setup and usage but lacks depth on design decisions or AI/ML workflow. |
| 56 | +- **Needs Improvement (0-9)**: Minimal or missing documentation. Hard to understand code structure or design decisions. |
| 57 | + |
| 58 | +## Interviewer Notes |
| 59 | + |
| 60 | +### Key Questions to Ask |
| 61 | + |
| 62 | +1. "Can you explain your choice of machine learning model and how it is suited to this task?" |
| 63 | +2. "What strategies did you use for preprocessing the review data, and why?" |
| 64 | +3. "How did you ensure that the model can handle a high volume of reviews in real time?" |
| 65 | +4. "Tell me about the monitoring system you set up. What performance metrics did you focus on, and why?" |
| 66 | +5. "If you had more time, what improvements or enhancements would you make?" |
| 67 | + |
| 68 | +### Red Flags |
| 69 | + |
| 70 | +- Unable to explain their choice of machine learning model or preprocessing strategy. |
| 71 | +- Did not consider the constraints of a mobile environment. |
| 72 | +- No system in place to monitor model performance. |
| 73 | +- Poor coding practices or lack of documentation. |
| 74 | + |
| 75 | +### Green Flags |
| 76 | + |
| 77 | +- Clear and thoughtful explanation of machine learning model choice and preprocessing strategy. |
| 78 | +- Demonstrates understanding of the unique constraints and challenges of a mobile environment. |
| 79 | +- Implemented a robust system to monitor model performance. |
| 80 | +- Clean, well-structured code with comprehensive documentation. |
| 81 | +``` |
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