Data Management Foundations Preassessment – 60+ Solved Questions | SQL, Relationships, Indexing, Normalization & ETL | 2025/2026 | WGU IT & Data

This Data Management – Foundations Preassessment guide contains 60+ solved questions and answers aligned with the 2025/2026 curriculum at Western Governors University (WGU). The content provides an essential foundation in relational databases, data modeling, normalization, and structured query language (SQL), tailored to support students preparing for competency-based assessments and industry-aligned certification. The document covers: Data Basics: structured vs. unstructured data, flat files, characteristics of raw data Entity-Relationship Modeling: entity types, relationships (e.g., many-to-many), referential integrity, functional dependency SQL Queries: SELECT statements, JOIN conditions, WHERE filters, ORDER BY vs. DISTINCT, COUNT and asterisk usage Database Keys: primary key, foreign key, alternate key, candidate key Indexing: benefits, purpose, physical implementation (pointers), data duplication in indexes Normalization Forms: first and third normal form, multivalued attributes, single-valued attributes, table transformation logic ETL & BI: components of extract, transform, load (ETL), data aggregation, prediction vs. estimation, affinity grouping Business Impact: improved data access, increased throughput, query response time benefits from relational DBMS Each question is paired with a verified answer in a flashcard format—perfect for fast review or exam simulation. This resource is ideal for: WGU students enrolled in Data Management – Foundations (PBLN) or D425 Learners in IT, data analytics, or computer science programs Candidates preparing for database certifications or SQL assessments Tutors and instructors delivering foundational database content Keywords: data management, SQL queries, primary key, foreign key, ER diagram, candidate key, data normalization, ETL, relational database, index optimization, structured data, unstructured data, many-to-many relationship, functional dependency, COUNT SQL, ORDER BY, distinct filter, first normal form, third normal form, BI systems, WGU data