Author: aliu36746

close menu icon System Design Interview Questions Adobe System Design Interview Questions Top Atlassian System Design Interview Questions Top Amazon System Design Interview Questions Top Microsoft System Design Interview Questions Top Meta (Facebook) System Design Interview Questions Top Netflix System Design Interview Questions Top Uber System Design Interview Questions Top Google System Design Interview Questions Top Apple System Design Interview Questions Top Airbnb System Design Interview Questions Top 10 System Design Interview Questions Mobile App System Design Interview Questions Top 20 Stripe System Design Interview Questions Top Shopify System Design Interview Questions Top 20 System Design Interview Questions Top Advanced System Design Questions Most-Frequented System Design Questions in Big Tech Interviews What Interviewers Look for in System Design Questions Critical System Design Questions to Crack Any Tech Interview Top 20 API Design Questions for System Design Interviews Top 10 Steps to Create a System Design Portfolio for Developers Introduction to High-Level System Design What is System Design? Difference Between HLD and LLD Key Considerations in HLD System Design Fundamentals Functional vs. Non-Functional Requirements Scalability, Availability, and Reliability Latency and Throughput Considerations Load Balancing Strategies Architectural Patterns Monolithic vs. Microservices Architecture Layered Architecture Event-Driven Architecture Serverless Architecture Model-View-Controller (MVC) Pattern CQRS (Command Query Responsibility Segregation) Scaling Strategies Vertical Scaling vs. Horizontal Scaling Sharding and Partitioning Data Replication and Consistency Models Load Balancing Strategies CDN and Edge Computing Database Design in HLD SQL vs. NoSQL Databases CAP Theorem and its Impact on System Design Database Indexing and Query Optimization Database Sharding and Partitioning Replication Strategies API Design and Communication REST vs. GraphQL vs. gRPC Designing Scalable APIs Rate Limiting and Throttling Authentication & Authorization (OAuth, JWT) Caching Strategies Types of Caching Cache Invalidation Strategies Redis vs. Memcached Cache-Aside, Write-Through, and Write-Behind Strategies Message Queues and Event-Driven Systems Kafka vs. RabbitMQ vs. SQS Pub-Sub vs. Point-to-Point Messaging Handling Asynchronous Workloads Eventual Consistency in Distributed Systems Security in System Design Encryption (AES, RSA, TLS) API Security Best Practices Secure Data Storage and Access Control DDoS Protection and Rate Limiting Observability and Monitoring Logging Strategies (ELK Stack, Prometheus, Grafana) API Security Best Practices Secure Data Storage and Access Control DDoS Protection and Rate Limiting Real-World System Design Case Studies Distributed locking (Locking and its Types) Memory leaks and Out of memory issues HLD of YouTube HLD of WhatsApp close menu icon Best Practices for Writing Clean and Maintainable Code Why Clean and Maintainable Code MattersImproves CollaborationWhen working in a team, clean code ensures that everyone can understand and contribute to the codebase without confusion. According to a study by Stack Overflow, 75% of developers believe that readability is the most important aspect of code quality.Reduces Technical DebtPoorly written code accumulates technical debt, making future changes time-consuming and expensive. Clean code minimizes this risk, ensuring that your project remains agile and adaptable.Enhances Debugging and MaintenanceWell-structured code is easier to debug and maintain. A survey by GitLab found that developers spend 35% of their time fixing bugs, and clean code can significantly reduce this burden.Also Read: Top 10 DSA Questions on Linked Lists and Arrays Key Principles of Clean Code1. Follow Consistent Naming ConventionsUse Descriptive NamesChoose names that clearly describe the purpose of the variable or function. For example, instead of x, use userAge.Avoid AbbreviationsAbbreviations can be confusing. For instance, calc is less clear than calculateTotalPrice.Use CamelCase or Snake_CaseStick to a naming convention like CamelCase for variables (totalPrice) or snake_case for functions (calculate_total_price).Example Table: Naming ConventionsTypeGood ExampleBad ExampleVariableuserAgeuaFunctioncalculateTotalPricecalcClassShoppingCartSC2. Keep Functions and Methods ShortSingle Responsibility PrincipleEach function should do one thing and do it well. For example, a function named validateUserInput should only handle input validation, not data processing.Ideal Function LengthAim for functions that are no longer than 20 lines. According to Robert C. Martin, author of Clean Code, "Functions should be small, very small."3. Write Meaningful CommentsAvoid Redundant CommentsDon’t state the obvious. For example, // Increment counter is unnecessary if the code is counter++.Use Comments for Why, Not WhatExplain why a particular approach was taken, not what the code does. For example:# Using bubble sort for small datasets due to its simplicity 4. Use Version Control EffectivelyCommit MessagesWrite clear and concise commit messages. For example:Bad: "Fixed stuff"Good: "Fixed issue with user login validation"Branching StrategyUse a branching strategy like Git Flow to manage features, bugs, and releases effectively. Tools and Techniques for Clean Code1. Code Linting and FormattingTools like ESLint (for JavaScript) and Prettier can automatically format your code and catch errors.Benefits of Linting:Ensures consistent code style.Identifies potential bugs early.2. Automated TestingAutomated tests ensure that your code works as expected and remains bug-free.Types of Tests:Unit Tests: Test individual functions or methods.Integration Tests: Test how different components work together.End-to-End Tests: Simulate real user scenarios.Example Testing Tools:LanguageToolJavaScriptJest, MochaPythonPyTestJavaJUnit3. Refactoring RegularlyWhen to Refactor:When you notice duplicated code.When a function becomes too long or complex.When you need to improve performance.Refactoring Techniques:Extract Method: Break down a large function into smaller ones.Rename Variables: Use more descriptive names.Remove Dead Code: Delete unused code to reduce clutter.Also Read: Top 10 System Design Interview Questions 2025 Common Pitfalls to Avoid1. Over-EngineeringAvoid adding unnecessary complexity to your code. Keep it simple and straightforward.2. Ignoring Code ReviewsCode reviews are a great way to catch issues early and share knowledge within the team.3. Skipping DocumentationDocumentation helps new developers understand the codebase quickly. Use tools like JSDoc or Sphinx to generate documentation automatically. Menu How does a real-time notification system work? A real-time notification system captures user actions as events, processes them, and delivers notifications instantly. It uses technologies like WebSockets and message queues to ensure timely delivery. To learn more about system design, check out our DSA course. What are the challenges in designing a real-time notification system? The main challenges include handling high traffic, reducing latency, and ensuring reliability. Scalability and fault tolerance are also critical. For a deeper dive into these concepts, explore our Web Development course. Which technologies are best for building a real-time notification system? Popular technologies include Kafka for event streaming, WebSockets for real-time communication, and Redis for caching. To master these technologies, enroll in our Master DSA, Web Dev & System Design course. How does YouTube manage high traffic without crashing? YouTube leverages CDNs (Content Delivery Networks), load balancing, and distributed databases to distribute traffic efficiently and prevent downtime. If you want to learn more about handling large-scale traffic and system design, check out this Master DSA, Web Dev & System Design Course. A real-time notification system captures user actions as events, processes them, and delivers notifications instantly. It uses technologies like WebSockets and message queues to ensure timely delivery. To learn more about system design, check out our DSA course.The main challenges include handling high traffic, reducing latency, and ensuring reliability. Scalability and fault tolerance are also critical. For a deeper dive into these concepts, explore our Web Development course.Popular technologies include Kafka for event streaming, WebSockets for real-time communication, and Redis for caching. To master these technologies, enroll in our Master DSA, Web Dev & System Design course.YouTube leverages CDNs (Content Delivery Networks), load balancing, and distributed databases to distribute traffic efficiently and prevent downtime. If you want to learn more about handling large-scale traffic and system design, check out this Master DSA, Web Dev & System Design Course. Got Confusion ? Accelerate your Path to a Product based Career Boost your career or get hired at top product-based companies by joining our expertly crafted courses. Gain practical skills and real-world knowledge to help you succeed. Explore our flagship courses Reach Out Now If you have any queries, please fill out this form. We will surely reach out to you. Contact Email Reach us at the following email address. arun@getsdeready.com Phone Number You can reach us by phone as well. +91-97737 28034 Our Location Rohini, Sector-3, Delhi-110085

Author: aliu36746

Best Practices for Writing Clean and Maintainable Code

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