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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Azure Data Engineer Certification (DP-203) Guide
Exam DP-203 and the Azure Data Engineer Associate certification were retired on 31 March 2025. This guide explains what that means for people who hold it or were studying for it, what the exam covered, how the Fabric Data Engineer Associate exam DP-700 differs, and how to plan your preparation now.
Cost Optimization for LLM Applications in Production
LLM bills grow with every token, and most applications waste many of them. This guide breaks a request's cost into its parts, measures prompt caching and output length on a local model, then prices five options for a month of traffic using published list rates, from no changes to a cached small model.
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.
AWS Cost Optimization for Data Workloads
A practical guide to AWS cost optimisation for data platforms: what each service bills for, the levers that move the bill for S3, Athena, Glue, EMR, Redshift and streaming, a measured example where storage layout cuts the data a query reads from 306.5 MB to 92 KB, and the budgets, tags and limits that stop surprises.
How to Get Promoted in a Data Team
Promotions in data teams rarely reward hard work alone; they reward evidence that you already operate at the next level. Using a public company's documented promotion process and job ladder, this guide explains what changes between levels for analysts, scientists and engineers, and how to build and present your case.
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%.