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.
Featured Guides
Data Science Roadmap 2026: A Complete Step-by-Step Guide
A data science roadmap in dependency order, from Python and SQL through cleaning, statistics and honest model evaluation to communicating results, with an exit test at every stage and one dataset that carries through the whole path.
What Is Generative AI? A Complete Beginner's Guide
What generative AI is, in plain language: how language models produce text one token at a time (shown with a tiny runnable model), how chat models are trained, how image models differ, what the technology is reliable for, and why it confabulates.
Learn Python from Scratch: A Complete 2026 Roadmap
How to learn Python from zero: install a current version (including the new Windows install manager), then work through seven stages, from values and loops to files, virtual environments, classes and tests, each ending with a small program you should be able to write on your own.
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Apache Kafka Explained: Streaming Data Basics
Apache Kafka explained from the ground up: events, topics and partitions, why keys decide ordering, how consumer groups track offsets and why data is not deleted when read, each shown by producing 1,000 real taxi events to a running broker and reading them back, plus replication and delivery guarantees.
Building a Customer Support Bot with LLMs
A useful support bot knows when to answer and when to hand over. This guide sets out the architecture of an LLM support bot, then routes 3,080 real banking queries to 77 intents with a small embedding model and shows how a confidence threshold trades the share the bot answers against how often it is right.
Power BI Performance Tuning: Make Reports Faster
A method for making Power BI reports faster: measure first with Performance Analyzer and read its DAX query, visual display and other timings, then shrink the import model, reduce column cardinality on a real retail dataset, write lighter DAX, filter and simplify pages, and check capacity and gateways.
Batch vs Streaming Data Processing: A Clear Comparison
Batch and streaming data processing compared honestly: what each is, a measurement on a real day of 77,033 taxi trips showing what a nightly, hourly, five-minute and per-event pipeline would each know at 12:30, where micro-batching fits, what streaming costs in complexity, and how to choose.
Building a Document Q&A Chatbot with RAG
Answering one question about a document is the easy part. A chatbot also gets follow-ups such as which one, and why. This guide builds a document Q&A chatbot over a 48-page PDF with page citations, runs one conversation two ways, and shows how rewriting follow-ups turned a wrong answer into a right one.
Tableau Interview Questions and Answers
Tableau interviews return to one topic more than any other: when each calculation happens. This guide answers the core questions on FIXED, INCLUDE and table calculations, with the Tableau formulas and their results reproduced on a year of real online orders: one filter, two answers, 100% or 2.57%.