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.
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Incremental Data Loading in Azure Data Factory
Incremental loading copies only what changed since the last run. This guide explains the four approaches Azure Data Factory documents, builds the watermark pattern step by step, runs it on a real table to show what it catches and what it silently misses, and says when to use change tracking, dated folders or windows.
Statistics for Data Science: The 20% You Actually Need
The statistics data scientists use constantly, each idea shown on real data in Python: when the median beats the mean, confidence intervals by bootstrapping, what a p-value does and does not say, why effect sizes matter, how testing many things manufactures findings, and how Simpson's paradox reverses a conclusion.
Statistics Interview Questions for Data Science
Statistics questions in data science interviews test judgement more than formulas. Eight common questions are worked here on 12,330 real online shopping sessions: skewed averages, standard error, p-values two ways, a bootstrap interval, a confounder in a weekend effect, multiple testing, outliers and sample size.
Airflow Tutorial: Orchestrating Data Pipelines
A practical introduction to Apache Airflow: what orchestration adds to a pipeline, the scheduler, DAG processor and metadata database, a complete three-task DAG written with the TaskFlow API and run on real taxi data with dag.test, how XComs, retries and logical dates work, an idempotent rerun, and design habits.
How to Tell a Story with Data: A Practical Framework
A framework for telling a story with data: five steps, context, change, cause, consequence and choice, organised with the main message first so the audience never gets lost, applied to a real online retailer's year from a flat summer to a pre-Christmas surge, with the chart for each step and the traps to avoid.
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.