Java
JavaSpring IoC & Dependency Injection Explained (Beginner Guide)
Understand Inversion of Control and Dependency Injection in Spring, the concept that unlocks all of Spring Boot. Plain-English explanation with clear Java examples.
JavaWhat is Spring Boot? A Beginner-Friendly Introduction
Understand what Spring Boot is and why it powers so many Java jobs: the problem it solves, Spring vs Spring Boot, auto-configuration, starters, and the embedded server.
JavaLearn Spring Boot: The Complete Roadmap (Zero to Pro)
Your complete beginner-friendly Spring Boot roadmap in Java: 18 lessons from IoC and REST APIs to security, testing, Docker, and deployment — with real examples from a production app.
JavaDSA Interview Practice Plan: How to Prepare (Beginner Guide)
Your complete DSA interview prep plan: the patterns that cover most problems, a realistic daily study routine, how to solve problems in interviews, and the right mindset.
JavaDSA in Java: Dynamic Programming Made Simple (Beginner Guide)
Dynamic Programming demystified: it is just recursion that remembers. Learn memoization and tabulation in Java with Fibonacci, and how to approach any DP problem.
JavaDSA in Java: Graphs — BFS & DFS Explained (Beginner Guide)
Learn graphs in Java from scratch: nodes and edges, adjacency lists, and the two essential traversals — BFS with a queue and DFS with recursion, plus the visited-set trick.
JavaDSA in Java: Heaps & Priority Queues (Beginner Guide)
Learn heaps and PriorityQueue in Java: the min-heap rule, O(1) peek and O(log n) insert/remove, max-heaps, and the Top-K interview pattern.
JavaDSA in Java: Trees & Binary Search Trees (Beginner Guide)
Learn trees and binary search trees (BST) in Java: nodes and children, the BST ordering rule, O(log n) search, in-order traversal, and why balance matters.
JavaDSA in Java: Hashing — HashMap & HashSet (Beginner Guide)
Master hashing in Java: how HashMap and HashSet give O(1) lookups, and the Two Sum pattern that turns O(n^2) brute force into O(n). The key DSA tool.