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.
Power BI vs Tableau vs Looker: A 2026 Comparison
Power BI, Tableau and Looker compared from each vendor's own documentation: where reports are built, how each models and queries data, what is free, how sharing works, which kind of organisation each suits, how Looker differs from Data Studio, and the skills that transfer between all three.
BigQuery vs Snowflake vs Redshift: A Comparison
BigQuery, Snowflake and Amazon Redshift all separate storage from compute and all speak SQL. They differ in what you manage, what you are billed for and which levers you tune. This comparison is drawn from each vendor's documentation, with a model of how idle time drives the bill on time-based compute.
GitHub Profile Tips to Impress Hiring Managers
A hiring manager who opens your GitHub profile sees a few things first: your profile README, up to six pinned repositories and a contribution graph. GitHub's documentation explains how each works. This guide shows how to set them up so the first minute shows your best work, and each project is easy to judge.
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.
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%.