PMI CPMAI Practice Test 2026 – Section 4 Data Preparation – Cleaning The Mess скачать в хорошем качестве

PMI CPMAI Practice Test 2026 – Section 4 Data Preparation – Cleaning The Mess

You know the dirty secret of AI? Nobody talks about it in job interviews. Eighty percent of your time is not spent building cool models. It is spent fixing dates, merging messy spreadsheets, and figuring out why the same customer name is spelled three different ways. That is Data Preparation. And if you hate it, you are normal. But if you skip it, you fail. In this video, I walk you through Phase 3 of the CPMAI methodology. I explain why cleaning comes after understanding, how to handle missing values without introducing leakage, and what feature engineering actually means in plain English. I also give you five new practice questions with full explanations. These are designed to trick you the same way the real PMI CPMAI exam does. 🔗 Get 35%Off the full 550+-question practice test on Udemy here: https://tinyurl.com/a7e9ck6p 📌 What is inside this video: 00:00 – Hook: The 80% rule nobody tells you 01:15 – Why Data Preparation is not Data Understanding 03:30 – The five tasks: Select, Clean, Construct, Integrate, Format 06:50 – Data leakage explained with a simple example 09:20 – Five practice questions with answers and explanations 14:00 – How to know when your data is ready 15:30 – Next video: Section 5 – Model Development 💬 Leave a comment: What is the messiest data you ever had to clean? Was it dates, names, or something worse? I want to hear your war stories. I reply to comments personally. 🔔 Subscribe for more: I upload new CPMAI practice test videos every week. Section 5 drops soon. Hit subscribe so you do not miss it. #Tags: #PMICPMAI #CPMAI2026 #DataPreparation #DataCleaning #FeatureEngineering #AIProjectManagement #PMI #AICertification #DataScience #MachineLearning #DataLeakage #PracticeTest #Udemy #Etsy #ExamPrep #TechTraining #Cognota #DataWrangling #AIWorkflow #CertificationPrep Tags (comma separated): PMI CPMAI, CPMAI 2026, Data Preparation, data cleaning, feature engineering, data leakage, AI project management, CPMAI Phase 3, PMI certification, AI practice test, data science exam, machine learning certification, how to pass CPMAI, Udemy practice test, Etsy study guide, data integration, cognitive project management, data formatting, 2026 exam prep, tech certification