Interview Fundamentals

Core Java concepts, practical Q&A, and coding discussion topics asked in technical interviews.

• Kafka Partitions: Ordering, Keys and Parallelism Explained

  14 Sep, 2026

  By Pratik Bhuite | 24 min read

  Series: Backend Interview Mastery

  Learn Kafka partitions, message keys, ordering, and consumer parallelism with production trade-offs, sizing guidance, and interview questions.

  • Backend
  • Apache Kafka
  • Messaging

• Kafka Architecture: Producers, Brokers, Topics and Offsets

  13 Sep, 2026

  By Pratik Bhuite | 22 min read

  Series: Backend Interview Mastery

  Learn Kafka architecture through producers, brokers, topics, partitions, consumers, and offsets. Understand ordering, replication, lag, and trade-offs.

  • Backend
  • Kafka
  • Messaging

• Queue vs Pub/Sub: When to Use Each Pattern

  12 Sep, 2026

  By Pratik Bhuite | 20 min read

  Series: Backend Interview Mastery

  Compare queue vs pub/sub patterns for backend systems. Learn delivery models, retries, fanout, ordering, and how to choose the right fit.

  • Backend
  • Messaging
  • Distributed Systems

• Cache Stampede: Avalanche, Penetration and Prevention

  11 Sep, 2026

  By Pratik Bhuite | 29 min read

  Series: Backend Interview Mastery

  Learn cache stampede prevention for avalanche and penetration failures with TTL jitter, request coalescing, stale data, and Bloom filters.

  • Backend
  • Caching
  • Redis

• Cache Invalidation Strategies: TTL, Events and Versioned Keys

  10 Sep, 2026

  By Pratik Bhuite | 27 min read

  Series: Backend Interview Mastery

  Learn cache invalidation strategies for backend systems: TTLs, delete-on-write, event-driven updates, versioned keys, race conditions, and trade-offs.

  • Backend
  • Caching
  • Redis

• Redis Architecture: Data Types, Persistence and Scaling

  9 Sep, 2026

  By Pratik Bhuite | 19 min read

  Series: Backend Interview Mastery

  Learn Redis architecture through data types, persistence, replication, failover, clustering, and the production trade-offs behind fast in-memory systems.

  • Backend
  • Redis
  • Caching

• Cache Eviction Policies: LRU, LFU, FIFO and TTL

  8 Sep, 2026

  By Pratik Bhuite | 23 min read

  Series: Backend Interview Mastery

  Learn cache eviction policies including LRU, LFU, FIFO, and TTL. Choose a policy using workload patterns, memory limits, and production metrics.

  • Backend
  • Caching
  • Redis

• Write-Through vs Write-Back Caching: Key Differences

  7 Sep, 2026

  By Pratik Bhuite | 21 min read

  Series: Backend Interview Mastery

  Compare write-through vs write-back caching: write latency, durability, consistency, failure recovery, and when each cache write strategy fits.

  • Backend
  • Caching
  • Redis

• Cache-Aside Pattern: Read and Write Flows Explained

  6 Sep, 2026

  By Pratik Bhuite | 19 min read

  Series: Backend Interview Mastery

  Learn the cache-aside pattern, cache hit and miss flows, write invalidation, TTLs, stampede prevention, and production trade-offs.

  • Backend
  • Caching
  • Redis

• Why Is My SQL Query Slow? A Backend Debugging Guide

  5 Sep, 2026

  By Pratik Bhuite | 20 min read

  Series: Backend Interview Mastery

  Learn why SQL queries are slow and use EXPLAIN ANALYZE, query plans, indexes, and production evidence to fix them safely.

  • Backend
  • Databases
  • SQL