ADevGuide Java
Java learning path from interview fundamentals to design patterns and coding problem-solving.
Explore subtopics:
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Database Replication: Read Replicas, Lag, and Failover
Series: Backend Interview Mastery
Learn database replication, read replicas, replication lag, stale reads, and failover trade-offs for reliable backend systems.
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Database Deadlocks: Causes, Detection, and Prevention
Series: Backend Interview Mastery
Learn database deadlocks through transaction examples, wait-for cycles, retries, lock ordering, query design, and production prevention practices.
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Optimistic vs Pessimistic Locking: How to Choose
Series: Backend Interview Mastery
Compare optimistic vs pessimistic locking with SQL examples, conflict handling, retries, deadlocks, and practical backend trade-offs.
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Database Isolation Levels Explained With Real Transaction Examples
Series: Backend Interview Mastery
Learn database isolation levels through real transaction examples, including dirty reads, phantoms, write skew, retries, and SQL trade-offs.
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Composite Index Column Order: How to Choose the Right SQL Index
Series: Backend Interview Mastery
Learn how to choose composite index column order for SQL queries using equality, range, sort, selectivity, and EXPLAIN plan trade-offs.
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Abstract Factory Pattern in Java: Explanation and Example
Series: Java Design Patterns Series
Master the Abstract Factory pattern in Java with a hands-on example, object families, benefits, trade-offs, and when to choose it over Factory Method.
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Adapter Design Pattern in Java: Explanation and Example
Series: Java Design Patterns Series
Learn the Adapter design pattern in Java with class and object adapter examples, real-world analogies, use cases, pitfalls, and when to use it.
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Builder Pattern in Java: Explanation and Example
Series: Java Design Patterns Series
Learn the Builder pattern in Java with a hands-on example, method chaining, immutable objects, benefits, and key trade-offs to decide when to use it.
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Composite Design Pattern in Java: Explanation and Example
Series: Java Design Patterns Series
Learn the Composite design pattern in Java with a tree-structure example, uniform handling of leaf and composite objects, benefits, and common pitfalls.
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Factory Design Pattern in Java Explained with Example
Series: Java Design Patterns Series
Learn the factory design pattern in Java with a practical example, object creation flow, benefits, trade-offs, and when to use this pattern correctly.