All structured notes, deep dives, and technical guides in one place. Use the filters below to find exactly what you're looking for.
Go beyond simple RBAC. Master complex identity scenarios like claims transformation, custom authorization policies with requirements and handlers, and federated identity.
Master performance tuning with covering indexes, filtered indexes, and columnstore indexes. Learn how to eliminate Key Lookups and fix index fragmentation.
Master Dijkstra's shortest path, Topological sorting for task dependencies, and Minimum Spanning Trees (Prim & Kruskal) for network optimization.
Master complex validation scenarios in .NET. Learn to decouple business rules from your models using FluentValidation for cleaner, more testable code.
Explore performance-driven string algorithms like Rabin-Karp for substring search and Manacher's inspired logic for longest palindromic discovery.
Master the art of self-documenting APIs in .NET using Swashbuckle. Learn how to generate interactive documentation and client SDKs directly from your codebase.
Master the front door of your Microservices. Learn how an API Gateway handles request routing, response aggregation, and security offloading for distributed systems.
Protect your infrastructure from abuse and DDoS attacks. Explore Token Bucket, Leaky Bucket, and Fixed Window algorithms for effective API traffic management.
Master essential algorithmic patterns like Two Pointers, Sliding Window, and Prefix Sums to solve complex array and string problems with optimal complexity.
The absolute foundation of computer science. Learn to evaluate the time and space efficiency of any algorithm using Big O notation.
Master the fundamental properties of Binary Search Trees. Learn optimal search, insertion, and deletion algorithms and how to validate tree integrity.
Master low-level bitwise operations (AND, OR, XOR, NOT, Shifts) for high-performance computing, memory optimization, and competitive programming.
High-performance concurrency in .NET. Master System.Threading.Channels for asynchronous data pipelines and background task processing.
Thrive under pressure. Learn how controlled failure injection identified as 'Chaos Engineering' helps build resilient distributed systems.
Master the art of cloud financial accountability. Learn strategies for Rightsizing, Spot Instances, and Savings Plans to optimize your Azure and AWS spend.
Master Cross-Origin Resource Sharing. Learn how to configure robust CORS policies in ASP.NET Core to protect your API from unauthorized access.
Master the two ways of configuring Entity Framework Core. Learn when to use simple attributes and when to leverage the full power of the Fluent API.
Master the 'Shift Left' security philosophy. Learn how to automate SAST, DAST, and dependency scanning within your DevOps pipeline to build inherently secure software.
Master the fundamental problem-solving paradigm of breaking complex problems into recursive subproblems. Learn how Merge Sort, Quick Sort, and Karatsuba's work.
Why you should never expose your Database Entities to the UI. Master the use of Data Transfer Objects and AutoMapper for clean, decoupled .NET applications.
Demystify the most challenging algorithmic paradigm. Master Memoization and Tabulation to solve complex problems with optimal efficiency.
Implement cross-cutting logic like Soft Deletion and Multi-tenancy at the data layer. Learn how to centralize security and visibility rules in EF Core.
Tap into the internal lifecycle of Entity Framework Core. Learn how to use interceptors for low-level SQL modification, auditing, and performance monitoring.
Go beyond 'dotnet ef database update'. Master idempotent scripts, migration bundles, and zero-downtime deployment strategies for production databases.
Reduce database load and supercharge performance. Learn how to implement a shared query cache that lives beyond the scope of a single DbContext.
Master advanced data modeling in EF Core. Learn how to store database-only data with Shadow Properties and encapsulate your domain logic using Backing Fields.
Know when to bypass LINQ for high-performance SQL. Learn how to safely execute Raw SQL and Stored Procedures in EF Core while preventing SQL injection.
Master the art of decoupling deployment from release. Learn how to use Feature Flags for canary releases, A/B testing, and instant kill switches.
From social networks to Google Maps. Master the fundamental ways to represent graphs and the core algorithms for searching and traversing complex connectivity.
Learn the 'greedy' heuristic: choosing the local optimum to reach the global target. Understand why it works for Dijkstra's but fails for general Coin Change.
The workhorse of modern software. Master the mechanics of hashing, collision resolution (chaining vs. open addressing), and why it offers near O(1) performance.
Master the fundamental data structure for Priority Queues. Learn how Heaps use arrays to represent complete binary trees and solve K-th element problems.
Eliminate heap allocations. Master Span<T> and Memory<T> to build ultra-fast .NET applications with zero-copy data processing.
Master high-performance service-to-service communication. Learn how HttpClientFactory solves socket exhaustion and integrates with Polly for enterprise-grade resilience.
Process massive datasets without exhausting memory. Master asynchronous streaming in .NET using IAsyncEnumerable and C# yield return.
Stop writing brittle tests. Compare the speed of EF Core's In-Memory provider with the production-grade reliability of Docker-based Testcontainers.
High-performance teams aren't born; they are built. Explore a leadership philosophy centered on psychological safety, technical excellence, and the 'multiplier effect'.
Master the foundation of pointer-based data structures. Learn how to reverse lists, detect cycles, and find middle elements using the Fast & Slow pointer pattern.
Technical debt is not always a bad thing—if managed correctly. Learn a strategic framework for identifying, prioritizing, and paying down debt without slowing down feature delivery.
Venture beyond the table. Master the four types of NoSQL databases, the CAP theorem, and why 'eventual consistency' is the price of extreme scalability.
Master the art of self-referential logic. Learn the templates for solving combinatorial problems like Permutations, Subsets, and N-Queens using Backtracking.
Optimize your API's throughput and bandwidth. Master the configuration of Response Caching and Gzip/Brotli Compression in ASP.NET Core.
Master the 'Database-First' approach with EF Core. Learn how to scaffold entities and DbContext from a legacy database while maintaining clean code standards.
Solve the 'Distributed Transaction' problem in Microservices. Learn how to manage long-running workflows and data consistency using Orchestration and Choreography.
From Binary Search to Quick Sort. Master the complexity, trade-offs, and C# implementations of the most fundamental algorithms in Computer Science.
Master the infrastructure layer for service-to-service communication. Learn how Service Meshes handle traffic management, security, and observability in microservices.
Master compile-time metaprogramming. Learn how Source Generators reduce boilerplate and eliminate reflection overhead in modern .NET applications.
Master the modern rendering landscape. Learn when to use Server-Side Rendering (SSR), Static Site Generation (SSG), and the 'game-changer'—Incremental Static Regeneration (ISR).
Eliminate impossible UI states. Learn how Finite State Machines (FSMs) and XState provide a robust, visualizable way to manage complex React logic.
Hierarchical data modeling mastered. Deep dive into DFS (In-order, Pre-order, Post-order) and BFS (Level-order) traversals with C# implementations.
Master the fundamental data structures for order-based processing. Learn how Stacks (LIFO) and Queues (FIFO) power everything from web history to BFS algorithms.
Master the optimal data structure for string searching and autocomplete. Learn how Tries store shared prefixes to achieve O(L) lookup performance.
Coordinate complex business transactions across multiple repositories. Master the design pattern that ensures all-or-nothing database consistency in .NET.
Master Core Web Vitals and performance heuristics. Learn techniques like lazy loading, code splitting, and CDN strategies to build ultra-fast web applications.
Keep your UI buttery smooth. Learn how to use Web Workers to move heavy computations out of the main thread and prevent the 'Page Unresponsive' dialog.
Explain deferred execution vs. immediate execution in detail. Discuss how to build dynamic queries using Expression Trees.
Discuss the performance implications of reflection. Explain how to use the Roslyn compiler API for code analysis and generation.
Discuss how to prevent common vulnerabilities (e.g., SQL Injection, XSS, CSRF) within the ASP.NET Core framework.
Discuss the differences between Flexbox and Grid and when to use each. Explain concepts like flex-grow, justify-content, and grid-template-columns.
Optimizing database performance through advanced indexing techniques: Clustered, Non-Clustered, Filtered, and Covering Indexes.
A practical guide to securing Spring Boot applications against SQL Injection, XSS, CSRF, and broken access control.
Discuss the pros and cons of each approach.
Discuss the limitations of Context for high-frequency updates. Explain the core concepts of a modern state management library like Zustand (store-based) or Jotai (atom-based).
Compare and contrast different architectural patterns and understand their trade-offs.
Master SpringDoc (Swagger) and learn effective versioning strategies to maintain backward compatibility in your microservices.
Master asynchronous programming in Java. Compare traditional Threading, CompletableFuture, and the revolution of Project Loom's Virtual Threads.
Be ready to explain the async state machine and demonstrate with code how a deadlock can occur and how ConfigureAwait(false) helps prevent it.
Demystifying Identity (Who are you?) vs. Permissions (What can you do?). Learn to implement both using Spring Security and JWT.
Clarify the concepts of identifying users (AuthN) and controlling access (AuthZ) in software systems.
A comprehensive guide to deploying and managing Java applications on AWS, covering core compute, storage, and database services.
Explain how to improve application performance by storing and reusing data.
Explain the principles of Clean Architecture and how to implement it using the Onion or Hexagonal pattern.
Explore essential security practices for cloud environments, including identity management, data protection, and network security.
Compare different compute options in the cloud and when to use each.
Explain the CQRS pattern and how it helps in scaling read and write operations independently.
A comparison of database interaction paradigms in Java: heavy-weight ORM (Hibernate) vs. SQL mapping (MyBatis) vs. Typesafe SQL (jOOQ).
Compare a micro-ORM with a full-blown ORM and when to choose one over the other.
Discuss the essential components of a CI/CD pipeline, including automated testing, quality gates, and deployment strategies.
Explain how to handle concurrent data access and prevent data corruption.
Explain the difference between monitoring and observability. Discuss the three pillars of observability: logs, metrics, and traces. Name key services in Azure (Azure Monitor, Application Insights) and AWS (CloudWatch, X-Ray).
Explain how to manage application settings and secrets effectively using the Options pattern and environment-specific configurations.
Compare different database services in the cloud and their respective use cases.
Explain how to containerize an application with Docker. Compare Azure Kubernetes Service (AKS) and Amazon Elastic Kubernetes Service (EKS) for managing containerized applications.
A deep dive into Optimistic vs. Pessimistic locking strategies in Java using Spring Data JPA and Hibernate to preserve data integrity.
Understand common use cases like event-driven architecture and callbacks.
A deep dive into Inversion of Control (IoC), bean life cycles, and the critical differences between Singleton, Prototype, and Request scopes.
Explain the differences and when to use each scope in an ASP.NET Core application.
From classic GoF patterns to modern Java applications. Learn to apply Singleton, Strategy, Observer, and Factory patterns effectively.
Explore common design patterns like Singleton, Factory, and Repository, and their implementations in .NET.
Explain how JavaScript interacts with the DOM. Discuss event bubbling, capturing, and delegation.
Explain the core concepts of DDD, including entities, value objects, aggregates, and bounded contexts.
Master performance tuning in Java persistence: solving N+1 problems, efficient fetching strategies, and batch processing.
Understand the four states of a Hibernate entity (Transient, Managed, Detached, Removed) and how to navigate transitions effectively.
Provide specific examples of how to optimize EF Core queries for maximum performance.
Explore the benefits of event-driven systems and common messaging patterns using RabbitMQ or Azure Service Bus.
Understand how expression trees work in .NET and how they enable LINQ-to-SQL and dynamic query generation.
Master Aspect-Oriented Programming and @ControllerAdvice to keep your controllers clean and your error handling robust.
Learn how to use Action, Resource, and Exception filters to implement cross-cutting concerns in ASP.NET Core.
Choosing the right way to map Java entities: comparing the modern Annotation-driven approach with traditional XML and programmatic configuration.
Master GC tuning and memory safety. Understanding G1, ZGC, detecting memory leaks, and the vital role of try-with-resources.
Understand how the GC works to write memory-efficient code. Explain the Dispose pattern.
Understand the .NET Generic Host and how to manage application startup and shutdown lifecycle.
Take control of your application's startup and shutdown. Learn about ApplicationContext, SmartLifecycle, and CommandLineRunner.
Learn how to automatically enforce data boundaries like Soft Deletes and Multi-tenancy using Hibernate's global filter mechanisms.
Ensure your microservices can survive failure. Learn to implement health checks, retries, and circuit breakers.
Implement health checks and resilient communication patterns using Polly in .NET applications.
Master the journey from jar to container. Learn to Dockerize Spring Boot apps and deploy them at scale using Kubernetes.
Explore different hosting options for ASP.NET Core, including In-Process, Out-of-Process, and Kestrel.
Explain the importance of semantic HTML for SEO and accessibility (WCAG). Differentiate between div/span and semantic tags like article, nav, etc.
Learn how to perform efficient integration testing in ASP.NET Core using the WebApplicationFactory.
Master the art of investigative engineering. Learn how to perform a 5-Whys RCA and document production incidents professionally.
Learn the Groovy essentials needed to write powerful, dynamic Jenkinsfiles and shared libraries.
Compare gRPC and REST for inter-service communication, focusing on performance, serialization, and browser support.
Master the art of Continuous Integration and Deployment using Jenkins and GitLab. Learn to automate Java builds, tests, and deployments.
Why Streams are not Collections. Understand the mechanics of pipelining, lazy evaluation, and the performance myths of Java streams.
Explain how this impacts database queries with Entity Framework.
Demystifying how Java manages memory under the hood. Understand the stack/heap distinction and why everything in Java is pass-by-value.
Understand value types vs reference types and boxing/unboxing implications.
Explain the benefits of IaC. Compare platform-specific tools (Bicep, CloudFormation) with cloud-agnostic tools (Terraform).
Understand the request journey in Spring Boot. Master the differences between Servlet Filters, Handler Interceptors, and Aspect-Oriented Programming (AOP).
Understand the middleware pipeline and how to creation custom middleware for logging, authentication, and more.
Going beyond the Servlet model. Learn to build non-blocking, asynchronous Java web applications using Spring WebFlux.
Compare common mocking frameworks in .NET and how to use them for isolation in unit tests.
Compare the performance and developer experience of Minimal APIs with traditional Controller-based APIs.
Master key ES6+ features like Promises, async/await, arrow functions, and the event loop mechanism.
Distinguish between CPU-bound and I/O-bound operations and when to use threads vs async/await.
Exploring Document, Key-Value, and Graph databases. When to choose NoSQL over SQL for Java microservices.
Master the art of discussing complex projects using the STAR method (Situation, Task, Action, Result) for technical interviews.
Identify performance bottlenecks and use tools like JMeter or k6 to ensure system reliability under pressure.
How to drop down to raw SQL and execute stored procedures when JPA abstraction is not enough for performance or functionality.
Master the difference between functional and class components, and understand the modern lifecycle via Hooks.
Master useState, useEffect, useContext, and useReducer. Understand the rules of Hooks and performance optimization with memoization.
Master techniques to identify and solve performance bottlenecks in React using memoization, code splitting, and virtualization.
Compare state management strategies in React: from built-in Context API for simple needs to Redux Toolkit for complex application state.
How to implement client-side routing and handle the data fetching lifecycle in Single-Page Applications (SPAs).
Master unit and integration testing in React using Jest and React Testing Library (RTL). Learn to test behavior, not implementation details.
Master the principles of REST and discover industry standards for designing scalable, maintainable, and developer-friendly APIs.
Explore patterns for scaling applications, including vertical vs. horizontal scaling, load balancing, and partitioning.
Understand the serverless model and how to build event-driven applications using Azure Functions or AWS Lambda.
Master the five pillars of object-oriented design and learn how to apply them to Java applications for maximum maintainability.
Deep dive into the SOLID principles and how they help in writing maintainable and testable C# code.
Diagnose and fix database performance bottlenecks by analyzing EXPLAIN ANALYZE output and identifying inefficient sequential scans.
Master techniques for identifying and fixing slow SQL queries, including execution plans and indexing.
Practice designing Large-scale systems. Discuss trade-offs between different architectural components.
Master the art of automated testing in Java. Learn how to use Mockito for isolation and Testcontainers for reliable integration testing with real databases.
Master the nuances of Read Uncommitted, Read Committed, Repeatable Read, and Serializable. Learn how to prevent Dirty Reads and Phantoms in Spring Boot.
Understand the different transaction isolation levels and how they prevent concurrency issues like dirty reads.
Compare unit tests and integration tests, and learn how to balance them for effective test coverage.
Understand the risks and specific use cases for unsafe code in C#. Learn about pointer arithmetic, memory pinning, and stack allocation.
Setup nextjs x shandui x tailwind css
Here is a sample of some basic Markdown syntax that can be used when writing Markdown content in Astro.
Background Job Processing with Hangfire
Try a different keyword or expand your topic selection.