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Interview Questions

Curated interview questions across domains: coding problems, system design discussions, and domain-specific technical conversations.

Categories

Coding Questions

Programming problems: algorithm design, implementation, optimization, code quality.

  • Data Structures & Algorithms: Array/String/Tree/Graph/DP problems
  • Problem-Solving Approach: Understand → Plan → Code → Test → Optimize
  • Complexity Analysis: Time/space trade-offs
  • Follow-up Questions: Edge cases, improvements, alternative approaches

Coding Questions

Verbal / Conceptual Questions

Technical discussion and conceptual understanding across topic areas.

Databases & SQL

Understanding database design, queries, transactions, optimization. DB Questions

Java Core

Fundamentals, OOP, memory, concurrency, language features. Java Core Questions

Java Advanced

Advanced patterns, frameworks, performance, architecture. Java Advanced Questions

Spring Boot & Web

Spring framework, dependency injection, REST APIs, web development. Spring Boot Questions

Microservices & Distributed Systems

Architecture patterns, scalability, resilience, distributed computing. Microservices Questions

System Design

Designing scalable systems, trade-offs, real-world scenarios. System Design Questions

DevOps & Cloud

Deployment, containerization, infrastructure, cloud platforms. DevOps Questions

Machine Learning & AI

ML concepts, algorithms, deep learning, LLM applications. ML/AI Questions

Design Patterns

Gang of Four patterns, creational/structural/behavioral, real-world applications. Design Patterns Questions

Interview Tips

Coding Questions

  • Think aloud: Explain your approach before coding
  • Clarify: Ask about constraints, edge cases, examples
  • Brute force first: Start simple, then optimize
  • Test: Walk through examples, check edge cases
  • Complexity: State time/space complexity before submitting

Verbal Questions

  • Understand the question: Rephrase to confirm understanding
  • Structured answer:
  • Direct answer
  • Why (reasoning/trade-offs)
  • Examples (real-world or code)
  • Alternatives (when applicable)
  • Deep dive: Be ready for follow-ups; show depth
  • Connect concepts: Link to related topics when relevant

General Tips

  • Be honest: "I don't know, but I'd approach it this way..."
  • Ask clarifications: Better to understand than assume
  • Discuss trade-offs: Compare approaches (speed vs readability, etc.)
  • Show enthusiasm: Problem-solving mindset, curiosity

How to Use This Section

  1. Pick a topic from the list above
  2. Review the questions (will be filled in progressively)
  3. Prepare your answer:
  4. Write down key points
  5. Practice explaining clearly
  6. Time yourself (typical interview: 10-15 min per question)
  7. Discuss with a peer: Verbal practice is valuable
  8. Iterate: Refine based on feedback

See also: Quick Reference, Behavioral / STAR, Question Bank