WGU C175 Data Management Foundations 2026 Pre-Assessment – Correct Q&A on SQL, Normalization, ER Diagrams & Data Mining

This WGU C175 Data Management Foundations 2026 Pre-Assessment document contains structured exam questions with correct answers covering foundational database concepts, SQL querying, normalization, entity-relationship modeling, and data management principles. The material includes definitions of structured and unstructured data, flat files versus database management systems, primary keys, foreign keys, candidate keys, referential integrity rules (insert, update, delete), and indexing strategies for performance optimization. The guide provides detailed SQL practice including SELECT statements, WHERE clauses, DISTINCT vs ORDER BY differences, JOIN conditions across multiple tables, COUNT functions, IN operators, and filtering with comparison operators. It also reviews relational design concepts such as functional dependency, intersection data, many-to-many relationships, unary relationships, modality and cardinality interpretation in ER diagrams, and normalization through first normal form (1NF) and third normal form (3NF). Advanced topics include extract, transform, load (ETL) processes, business intelligence systems, data mining concepts such as prediction vs estimation, affinity grouping, and structured versus unstructured data examples. Practical scenarios test understanding of indexing, domain matching between primary and foreign keys, and query optimization techniques relevant to modern relational database management systems. This resource is especially suitable for: WGU students enrolled in C175 Data Management Foundations Students preparing for the WGU C175 Objective Assessment IT and data analytics students reviewing relational database concepts Learners studying SQL querying and database normalization Professionals seeking foundational knowledge in data management and BI systems The structured question-and-answer format supports efficient pre-assessment preparation, strengthens SQL fluency, reinforces ER modeling interpretation skills, and builds mastery of relational database design concepts required to pass the C175 course assessment. Keywords: WGU C175 pre assessment 2026 data management foundations structured vs unstructured data flat files vs DBMS entity relationship diagram ERD primary key foreign key candidate key alternate key referential integrity rules database indexing purpose SQL SELECT WHERE clause DISTINCT vs ORDER BY SQL JOIN conditions COUNT function SQL data normalization 1NF 3NF functional dependency many to many relationship unary relationship ERD ETL extract transform load business intelligence systems data mining prediction estimation