High-Level Design (HLD)
High-Level Design (HLD) outlines the system architecture and overall structure of a software solution. It defines components, modules, data flow, technologies and their interactions. HLD focuses on scalability, performance and reliability, serving as a bridge between requirements and Low-Level Design. It’s essential for planning system-wide decisions.
Top High-Level Design (HLD) Articles
System Design Interview – BIGGEST Mistakes to Avoid
Learn the biggest mistakes to avoid in a system design interview, from unclear requirements to poor trade-off analysis. Includes real-world cases, advanced insights and examples to help you ace your next system design interview.
Top High-Level Design(HLD) Interview Questions 2025
Top High-Level Design(HLD) Interview Questions and answers, HLD QnA, HLD interview preparation
Top High-Level Design (HLD) Blogs
System Design Interview: How to Prevent Duplicate Payments Using Idempotency
How to prevent duplicate payments using idempotency keys, database constraints and reconciliation, a full system design interview walkthrough.
System Design Basics: High Level Design (HLD) vs Low Level Design (LLD)
System design explained in plain words, what HLD and LLD actually mean, with a real project story, a URL shortener example and working Java code
Functional vs Non-Functional Requirements (With Real Examples)
Functional vs non-functional requirements explained with a real incident, ISO/IEC 25010 types, examples, templates and a 5-minute audit checklist.
Availability in System Design: A Beginner-to-Advanced Guide
Learn availability in system design, including high availability, CAP, SLA, SLO, SLI, nines, redundancy, failover, observability, trade-offs and FAQs.
My Microsoft SWE Interview Experience (July 2026): 4 Rounds, Real Mistakes and the Offer
Read my Microsoft Software Engineer (L62) interview experience with coding, LLD, HLD, managerial rounds, mistakes, solutions, and preparation tips.
Uber SDE-2 Interview Experience : LLD, HLD, DSA & Hiring Manager Round
Read a real Uber SDE-2 interview experience covering DSA, low-level design, high-level system design, behavioral rounds, hiring freeze and key takeaways.
High-Level Design (HLD): A Complete Beginner to Advanced Guide
Learn High-Level Design (HLD) in system design with architecture, components, scalability, load balancing, databases, real-world examples and best practices.
Latency vs Throughput in System Design
Compare latency vs throughput in system design. Learn key differences, trade-offs, Little's Law, real-world examples and optimization techniques.
Throughput in System Design : The Complete Beginner to Advanced Guide
Understand throughput in system design with real-world examples, Little's Law, optimization strategies, scalability techniques and interview tips.
Latency in System Design: The Complete Beginner to Advanced Guide
Learn latency in system design with real-world examples, types, causes, RTT, tail latency, measurement tools, optimization techniques and best practices.
Popular Topics
Coding ProblemsLanguage-ConceptsMySQLArtificial IntelligenceDSASystem Design InterviewAIInterviewInterview QuestionsSystem Design
Coding problems are exercises designed to test a programmer’s ability to write logic, solve challenges and apply algorithms or data structures. They help improve problem-solving skills, logical thinking and coding efficiency. Common in interviews and competitive programming, coding problems range from simple tasks to complex algorithmic challenges, preparing developers for real-world software development scenarios.
This tag is used to understand a basic part of the language.
MySQL is an open-source relational database management system widely used for storing and managing structured data. It supports SQL for querying, updating and controlling data efficiently. Known for reliability, speed and scalability, MySQL powers web applications, enterprise systems and cloud platforms. It is commonly used with PHP, Java, Python and modern application stacks like LAMP and MERN.
Artificial Intelligence (AI) is the simulation of human intelligence in machines, enabling them to think, learn and make decisions. It powers systems to solve problems, recognize patterns, understand language and adapt over time. AI is used in various fields, including robotics, healthcare, finance and everyday applications like virtual assistants.
DSA (Data Structures and Algorithms) is a fundamental concept in computer science that focuses on efficiently storing, organizing and processing data. Data structures like arrays, linked lists, stacks and trees manage data, while algorithms provide step-by-step solutions to problems. Mastering DSA is essential for writing optimized, scalable and high-performance code.
System Design Interview is a technical interview round where candidates design scalable, reliable and efficient software systems. It evaluates understanding of architecture, databases, APIs, scalability, load balancing, caching and real-world problem-solving to assess the ability to build large-scale applications.
Artificial Intelligence (AI) is the simulation of human intelligence in machines, enabling them to think, learn and make decisions. It powers systems to solve problems, recognize patterns, understand language and adapt over time. AI is used in various fields, including robotics, healthcare, finance and everyday applications like virtual assistants.
A structured conversation where one participant asks questions and the other provides answers of those questions.
Interview Questions are structured queries asked by employers to evaluate a candidate’s technical skills, problem-solving ability, experience, communication skills and cultural fit. These questions can include HR, behavioral, technical, coding and situational topics to assess whether the candidate is suitable for the job role and organization.
System design is the process of defining the architecture, components, modules, interfaces and data flow of a system to meet specific requirements. It focuses on creating scalable, efficient and maintainable solutions, covering both high-level design (HLD) and low-level design (LLD). Essential for building reliable, high-performance software systems.
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You are given two integer arrays arr1 and arr2, sorted in accending order, and two integers m and n, representing the number of elements in arr1 and arr2 respectively. Merge arr1 and arr2 into a single array sorted in accending order.
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Top High-Level Design(HLD) Interview Questions and answers, HLD QnA, HLD interview preparation
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