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Java Backend Full-Stack

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Latest from Java Backend Full-Stack

21 recent articles

Java Backend Full-Stack

May 1, 2025 · Databases

Common Interview Question: When Does a MySQL Index Fail? Hands‑On Demo

This article walks through a mini‑project that creates a student table, adds indexes, populates it with 100 k rows, and then demonstrates six concrete scenarios—such as leading wildcards, arithmetic on indexed columns, functions, type mismatches, composite‑index misuse, and encoding differences—that cause MySQL indexes to become ineffective, showing the EXPLAIN output for each case.

Database PerformanceEXPLAINMySQL

0 likes · 8 min read

Common Interview Question: When Does a MySQL Index Fail? Hands‑On Demo

Java Backend Full-Stack

Apr 26, 2025 · Backend Development

Master ThreadLocal: Answer Interview Questions and Prevent OOM Leaks

This article explains ThreadLocal’s internal mechanism, why improper use can cause OutOfMemoryError in thread pools, demonstrates the issue with a Java example, and provides best‑practice guidance—especially calling remove()—to prevent memory leaks while preparing for interview questions.

JavaMemory LeakOutOfMemoryError

0 likes · 11 min read

Master ThreadLocal: Answer Interview Questions and Prevent OOM Leaks

Java Backend Full-Stack

Apr 20, 2025 · Interview Experience

Common Interview Questions from Over 10 Companies – What You’ll Face

A friend who landed a 16K job in a first‑tier city shares more than 30 interview questions he encountered across ten+ companies, covering JVM internals, performance tuning, concurrency, design patterns, database locking, distributed transactions, and system reliability.

JVMPerformanceconcurrency

0 likes · 4 min read

Common Interview Questions from Over 10 Companies – What You’ll Face

Java Backend Full-Stack

Apr 15, 2025 · Backend Development

How to Retrieve Nearby Charging Station Information Using Redis GEO

This tutorial shows how to obtain a user's current latitude and longitude via an IP API, send the coordinates to a backend service that stores charging stations in Redis GEO, and query stations within a 20‑kilometer radius, with complete front‑end and back‑end code examples.

Charging StationGEOJava

0 likes · 4 min read

How to Retrieve Nearby Charging Station Information Using Redis GEO

Java Backend Full-Stack

Apr 13, 2025 · Interview Experience

7 Tell‑tale Signs You’re an Inexperienced Programmer (And How to Fix Them)

The article outlines seven common behaviors—such as massive one‑off commits, messy code, multitasking without planning, arrogance, ignoring feedback, handling personal matters at work, and chasing every new tech trend—that reveal a developer’s lack of experience, and offers concrete actions to overcome each pitfall.

career advicecode reviewinexperience

0 likes · 11 min read

7 Tell‑tale Signs You’re an Inexperienced Programmer (And How to Fix Them)

Java Backend Full-Stack

Apr 8, 2025 · Backend Development

Interview Question: Designing a Service Registry

The article walks through the need for a service registry in a micro‑service scenario, explains how services register and discover each other, discusses high‑availability deployment, and compares push, pull, and long‑polling mechanisms for dynamic detection of service instances.

high availabilitylong pollingmicroservices

0 likes · 10 min read

Interview Question: Designing a Service Registry

Java Backend Full-Stack

Mar 27, 2025 · Databases

Hands‑On Sharding: Implementing Database and Table Partitioning with Spring Boot and Sharding‑JDBC

This article walks through a complete sharding implementation that splits a user table across four MySQL databases and sixteen tables, discusses challenges such as distributed IDs, transactions, data migration and pagination, and provides full Spring Boot, Sharding‑JDBC, Elasticsearch and Redis configurations with code examples.

Distributed IDElasticsearchMySQL

0 likes · 10 min read

Hands‑On Sharding: Implementing Database and Table Partitioning with Spring Boot and Sharding‑JDBC

Java Backend Full-Stack

Mar 21, 2025 · Interview Experience

Only Four Interviews After a Layoff: My Takeaways

After being laid off, the author interviewed only four companies, detailing each interview’s technical questions—from Spring Cloud and MySQL to concurrency and design patterns—and reflecting on the interviewers’ professionalism, the relevance of his skill set, and the importance of matching resumes to job requirements.

JavaMySQLRedis

0 likes · 6 min read

Only Four Interviews After a Layoff: My Takeaways

Java Backend Full-Stack

Mar 18, 2025 · Backend Development

18 Essential Practices for Designing Robust Backend APIs

The article outlines eighteen critical considerations for designing backend interfaces, ranging from documentation format and unified parameter schemas to encryption, idempotency, versioning, and monitoring, providing interview-ready insights that can impress hiring managers.

api-designbackendidempotency

0 likes · 5 min read

18 Essential Practices for Designing Robust Backend APIs

Java Backend Full-Stack

Mar 17, 2025 · Fundamentals

How Redis Implements Bloom Filters to Prevent Cache Penetration

The article explains the probabilistic Bloom filter data structure, its initialization, hash‑based insertion and query process, illustrates collisions with concrete examples, and shows how Redis (via Redisson) supports Bloom filters with Java code to efficiently block cache‑penetration attacks.

bloom filtercache penetrationprobabilistic data structure

0 likes · 6 min read

How Redis Implements Bloom Filters to Prevent Cache Penetration