Tech interview concepts, explained
Short, focused articles on the concepts behind tech interview questions — the traps interviewers actually probe, with worked examples. See all topics we cover.
- NoSQLEN
Decoding NoSQL: The Trade-offs That Matter in Interviews and Production
Master NoSQL database trade-offs and avoid pitfalls at interviews and in production systems.
- Big-OEN
Navigating Big-O Notation: A Common Pitfall in Technical Interviews
Master Big-O notation to confidently tackle performance-related questions in tech interviews and on the job.
- AlgorithmsEN
Time Complexity: The Hidden Pitfalls of Algorithmic Thinking
Master time complexity analysis to ace your interviews and avoid production issues.
- AWSEN
AWS Cost Management and The Importance of the Free Tier
Understand how AWS Free Tier can impact cost management and decision-making in cloud infrastructure.
- ExpressEN
Middleware Mastery: Navigating Express.js for Robust Applications
Understanding Express middleware is key for scalable applications and successful interviews.
- Node.jsEN
Mastering Middleware in Node.js: The Key to Express Application Efficiency
Learn how middleware transforms Node.js applications, ensuring efficiency and reliability in production environments.
- CSSEN
CSS Positioning: why absolute breaks your layout
Understanding CSS positioning is crucial for effective layouts and preventing common design issues in production.
- SecurityEN
Navigating Security Risks in Web Development: Practical Insights
Learn to identify and manage critical web security risks that can trip up developers in interviews and production environments.
- TestingEN
Testing Strategy: Navigating the Pitfalls of Automated Testing
Learn how to effectively prioritize tests and avoid reliance on code coverage metrics for successful automated testing.
- ComponentsEN
React Native UI Components: making them actually reusable
Learn how to effectively create and test reusable UI components in React Native for cross-platform use.
- PerformanceEN
Balancing Performance: The Trade-offs in Modern Development
Understand the critical performance trade-offs in development to excel in interviews and real-world projects.
- GitEN
Mastering Git Merge Conflicts: Best Practices for Developers
Learn to resolve Git merge conflicts effectively to ace technical interviews and succeed in development.
- HooksEN
React Hooks: the dependency and ordering traps
Understanding React Hooks prevents common pitfalls that lead to performance issues and bugs during development.
- JavaScriptEN
JavaScript Scope: the silent function failures
Mastering JavaScript scope is crucial to avoid silent failures during development and in interviews.
- Kubernetes ConfigMapsEN
Kubernetes ConfigMaps: The Hidden Complexity Behind Configuration Management
Understanding Kubernetes ConfigMaps is crucial for managing application configurations effectively in your deployments.
- List RenderingEN
List Rendering Keys: why array indices are a bug waiting to happen
Learn about the pitfalls of using array indices as keys in React list rendering to avoid bugs and improve performance.
- React Component CompositionEN
Composite Components in React: Mastering Composition for Robust UIs
Learn how to leverage composite components in React for cleaner, more scalable designs.
- Code SplittingEN
Code Splitting in React: when it actually pays off
Unlock the power of code-splitting in React to enhance performance and user experience by minimizing load times.
- React MemoizationEN
When to Use React.memo: Avoiding Unnecessary Re-renders in Production
Learn how to optimize React performance with memoization to prevent costly re-renders in your applications.
- Performance OptimizationEN
Denormalization vs. Normalization: Finding Your Performance Sweet Spot
Explore the trade-offs of normalization and denormalization in database design for optimal performance.
- CSS-in-JSEN
CSS-in-JS: Tackling Performance and Maintainability in Real-World Applications
Navigate the trade-offs of CSS-in-JS and impress interviewers with your deeper understanding of its implications.
- styled-componentsEN
styled-components: The Hidden Trade-offs That Can Break Your Styles in Production
Master styled-components by understanding their pitfalls in production and interview scenarios to stand out as a developer.
- Kubernetes SidecarsEN
Kubernetes Sidecars: The Hidden Complexity Behind a Flexible Architecture
Mastering sidecar containers can elevate your Kubernetes deployment strategies and avoid common pitfalls.
- WordpressEN
Navigating WordPress Security: Mitigating Risks Beyond Defaults
Understanding WordPress security risks can make the difference between a secure site and a disaster in production.