IT Career Guides & Free Resources
Expert roadmaps, tutorials, salary guides and interview prep across Data Science, Generative AI, Python, Cloud & Analytics — written by GloryTecks trainers in Hyderabad.
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Spark vs Hadoop: What Changed and Why
What changed when Spark overtook Hadoop MapReduce: the three parts of Hadoop, the MapReduce model emulated step by step on three million taxi trips with its intermediate data written to disk, why in-memory processing and DAGs mattered, what Spark still borrows from Hadoop, and what that means today.
How Transformers Changed AI: Attention Explained
Attention lets every word in a sentence draw information from every other word in one step. That idea, from a 2017 paper, replaced the older sequence models and underlies current language models. This guide works the arithmetic by hand, then shows a real attention head in GPT-2 linking a pronoun to its noun.
Semantic Search vs Keyword Search: What Changed with AI
Keyword search matches the words you typed. Semantic search matches what you meant. Each fails where the other succeeds, and this guide shows it with a test: 40 questions over 148 sections of Python documentation, answered by BM25, by embeddings and by a hybrid of the two.