GuideTechnology
12 min read
How to sort objects with Comparable and Comparator, how queues, deques and priority queues work, why ArrayDeque replaces the legacy Stack, and a decision guide with complexity and memory trade-offs for choosing the right collection.
GuideTechnology
14 min read
How Java stores key-value pairs, and how HashMap finds a value in constant time: hashing, buckets, collisions, resizing and treeification, explained with a small map you build yourself. Plus LinkedHashMap, TreeMap, the everyday Map methods, and the mistakes that corrupt a map.
GuideTechnology
5 min read
DSA is the most feared part of software interviews. The fear mostly comes from learning it badly. Here is a calm, pattern-based way to learn it, with a topic order, daily habits and ways to retain what you solve.
GuideCareer
5 min read
Most candidates prepare randomly and burn out. This six-week plan covers coding problems, fundamentals, system design basics, behavioural answers and mock interviews, with realistic daily time.
