40 docs tagged with "backend"

A comprehensive guide to advanced, scenario-based, and practical Spring Boot interview questions.

Real interview questions and practical Java answers from an Accenture first-round discussion.

Advanced exception handling interview questions focused on propagation, chaining, and layered design.

A senior deep dive into the JVM's AbstractQueuedSynchronizer: exploring the CLH queue, LockSupport.park(), and CAS state transitions in ReentrantLock.

A comprehensive deep dive into consistent hashing, addressing modulo scaling bottlenecks, hash rings, virtual nodes, data replication, interview questions, and real-world implementations.

Deep-dive into web authentication mechanisms — Cookies, Sessions, and JWTs — for senior engineering interviews and production systems.

Frequently asked Core Java interview questions covering language fundamentals and JVM behavior.

Implementation of Distributed Locks using Redis, Redisson, and the Redlock algorithm for senior engineers.

Experienced Java interview scenarios including memory behavior, HashMap resizing, and performance topics.

Curated Java interview questions and answers spanning core language topics, JVM internals, collections, concurrency, and OOP.

A complete guide to rate limiting — from beginner fundamentals to senior-level distributed design. Covers all algorithms, Redis implementations, decision frameworks, failure modes, and production patterns.

A senior deep dive into Redis advanced data types — Bitmaps, HyperLogLog, Geospatial, Streams, Sorted Sets, and Bloom Filters — with internals, memory math, production patterns, and when to use each.

Distributed caching patterns with Redis — cache-aside, write-through, write-behind, read-through — and production concerns like stampede, warming, invalidation, and Spring Cache integration.

Redis as a primary in-memory database — persistence mechanisms (RDB, AOF), durability guarantees, data modeling patterns, and when to use Redis as your primary store vs cache.

Redis replication mechanics, Sentinel for HA failover, Redis Cluster sharding, and production deployment patterns for senior engineers.

Complete guide to Redis data types — Strings, Hashes, Lists, Sets, Sorted Sets, Bitmaps, HyperLogLog, Geospatial, and Streams — with senior-level use cases and encoding internals.

Comprehensive guide to Redis maxmemory algorithms (LRU, LFU, Random) and how Redis approximates caching algorithms at scale for senior engineers.

Senior-level Redis interview questions covering data structures, persistence, clustering, cache patterns, distributed systems, and production failure scenarios.

Advanced Redis patterns — distributed locking, rate limiting, session management, leaderboards, search, and production performance tuning for senior engineers.

Deep dive into Redis pipelining for throughput optimization, MULTI/EXEC transactions, optimistic locking with WATCH, and atomic Lua scripting — with production patterns and pitfalls.

Redis Pub/Sub messaging — channels, patterns, fire-and-forget semantics, delivery guarantees, and production comparison with Redis Streams.

Complete guide to Redis Streams — append-only logs, consumer groups, message acknowledgement, and comparison with Kafka for senior engineers.

Redis TTL mechanics, expiry policies (lazy vs active), memory eviction strategies (LRU, LFU, volatile, allkeys), and senior-level memory management patterns.

Redis architecture internals, single-threaded model, I/O multiplexing, and use case decision guide for senior engineers.

Managing distributed sessions with Redis and Spring Session, including security best practices and programmatic control.

A complete guide to Spring Batch — Job architecture, Chunk-oriented processing, ItemReader/Processor/Writer, fault tolerance, scaling patterns, transaction boundaries, and production monitoring.

Advanced Spring Boot topics covering security, performance tuning, reactive systems, deployment, and production-ready design.

Overview of Spring Boot, its core benefits, and why it is widely used for modern Java backend and microservice development.

Top Spring Boot interview questions covering auto-configuration mechanics, starter dependencies, BOM version resolution, and embedded server bootstrapping.

Curated Spring Boot interview questions and answers spanning fundamentals, advanced topics, and real-world production scenarios.

Complete guide to Spring Cloud, covering Service Discovery (Eureka), Config Server, API Gateway, Circuit Breakers, Distributed Tracing, internal workings, integration patterns, pros/cons, and interview questions.

Complete guide to Spring Data JPA, including repositories, entities, query methods, and persistence best practices.

A complete guide to custom JPQL, Native SQL, SpEL, projections, and senior-level internals — persistence context mechanics, N+1 prevention, memory optimization, and connection pool management.

Advanced Spring Framework guide covering bean lifecycle, AOP, data access, reactive programming, and batch processing.

Collection of Spring Framework interview questions and answers covering core concepts, containers, web, data, and architecture topics.

Foundational overview of the Spring Framework, including IoC, dependency injection, modules, and enterprise application development.

A comprehensive reference covering Spring Boot, Spring Framework, security, data access, web layer architecture, and interview preparation.

Essential SQL interview questions covering window ranking functions, B-Tree vs Hash indexing, composite index left-prefix rules, and EXPLAIN execution plan analysis.

Advanced and tricky Java interview questions aimed at experienced developers and edge-case behavior.

A comprehensive deep dive into Java 21 Virtual Threads, Carrier Threads, continuations, and avoiding synchronized pinning for senior engineers.