Junior Frontend Engineers (Beginner)
Problem Title: Responsive Layout
Build a responsive webpage using CSS Grid or Flexbox.
Problem Description:
In this challenge, you will create a responsive webpage layout that adapts to different screen sizes using CSS Grid or Flexbox. The goal is to help you understand the fundamentals of creating flexible layouts and ensuring that your web pages look great on all devices. You will start with a simple static page and then enhance it to be fully responsive.
Checklist:
- Set up a basic HTML structure
- Implement a header, main content area, and footer
- Use CSS Grid or Flexbox to create a responsive layout
- Ensure elements resize and reposition smoothly on different screen sizes
- Test the layout on multiple devices or using browser developer tools
Junior Backend Engineers (Beginner)
Problem Title: MongoDB Integration
Connect an Express server to a MongoDB database and perform basic CRUD operations.
Problem Description:
This challenge involves integrating MongoDB with an Express server to perform CRUD operations. You’ll set up MongoDB, connect it to your Express server, and implement routes to Create, Read, Update, and Delete documents. This exercise will help you gain hands-on experience with working databases in a backend environment.
Checklist:
- Install MongoDB and Mongoose
- Connect your Express server to a MongoDB database
- Create models and schemas for your data
- Implement CRUD routes (Create, Read, Update, Delete)
- Test your endpoints using a tool like Postman
Senior Frontend Engineers (Intermediate)
Problem Title: Performance Optimization
Optimize a React component by memoizing with React.memo and using useCallback.
Problem Description:
In this challenge, you will focus on optimizing a React component’s performance. The key is to use React.memo for memoizing functional components and useCallback for memoizing callback functions. This exercise will help you understand how to identify unnecessary re-renders and how to optimize them, leading to more efficient and performant React applications.
Checklist:
- Create a React component that renders a list of items
- Identify areas causing unnecessary re-renders
- Use
React.memoto optimize functional components - Implement
useCallbackto memoize callback functions - Test the optimizations to ensure improved performance
Senior Backend Engineers (Intermediate)
Problem Title: Database Transactions
Implement transaction support for database operations in MySQL using Sequelize.
Problem Description:
In this challenge, you will implement transaction support for database operations in a MySQL database using Sequelize. Transactions are crucial for maintaining data integrity, especially when performing multiple related operations that should either all succeed or all fail. You will learn how to use Sequelize to manage transactions and ensure that your database operations are atomic and consistent.
Checklist:
- Set up a MySQL database and integrate it with a Node.js project using Sequelize
- Create a Sequelize model and define relationships between models
- Implement a transaction that encompasses multiple database operations
- Handle transaction commit and rollback scenarios
- Test your transaction implementation using sample data and edge cases
Staff Frontend Engineers (Advanced)
Problem Title: Performance Profiling
Profile and optimize the performance of a large React application using Chrome DevTools.
Problem Description:
Checklist:
Staff Backend Engineers (Advanced)
Problem Title: Event-Driven Architecture
Implement an event-driven architecture using Node.js with Kafka or RabbitMQ.
Problem Description:
Checklist:
We hope these practice problems challenge you and help you grow as a developer. Stay tuned for our next issue, where we’ll continue to provide exciting and educational coding challenges. Happy coding!
Sincerely,