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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LoRA and QLoRA: Efficient Fine-Tuning Explained
Full fine-tuning retrains every weight in a model. LoRA freezes them all and trains a small add-on instead, and QLoRA shrinks the frozen model to 4 bits so it fits on one graphics card. This guide explains both and runs LoRA for real: 294,912 trainable parameters out of 124 million, and an adapter of 1.2 MB.
Delta Lake Explained: Reliable Lakes with ACID
Delta Lake explained with a working table built from real taxi data: what the transaction log is, how each write becomes an atomic version, schema enforcement rejecting a bad append, delete and merge, a merge that quietly re-inserted deleted rows, time travel between versions, and maintenance.
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.
Behavioral Interview Questions for Data Roles
Behavioural questions decide more data job offers than candidates expect, because they are usually scored against a written rubric. This guide explains how structured interviews score you, how to use STAR with the right proportions, and how to answer the questions data roles get most, with illustrative answers.
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%.