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.
Azure Synapse Analytics Explained for Beginners
Azure Synapse Analytics puts a data warehouse, a query engine over the data lake, Spark and pipelines in one workspace. This guide explains each part in plain terms, shows with real data why the distribution of a table matters in a dedicated SQL pool, and sets out what Microsoft now says about Fabric.
BigQuery SQL: Tips, Tricks and Optimization
BigQuery rewards a few specific habits. This guide gives twelve, each tied to Google's own guidance: read fewer columns, filter and aggregate before joining, do several measures in one pass with COUNTIF, guard division with SAFE_DIVIDE, and stop expecting CTEs to be cached. Three are shown on 2.9 million real trips.
Row-Level Security (RLS) in Power BI: A Complete Guide
A complete guide to row-level security in Power BI: the workflow from roles in Desktop to members in the service, static rules, dynamic security with USERPRINCIPALNAME and a user-mapping table shown on a real database, testing roles, why RLS applies only to viewers, group membership, and the limitations to plan for.
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%.