WGU D427 OBJECTIVE ASSESSMENT FINAL EXAM AND PRACTICE EXAM COMPLETE 300 QUESTIONS COVERING DATA MODELING, SQL QUERIES, DATABASE DESIGN, NORMALIZATION, AND RELATIONAL DATABASE MANAGEMENT SYSTEMS.

WGU D427 OBJECTIVE ASSESSMENT FINAL EXAM AND PRACTICE EXAM COMPLETE 300 QUESTIONS COVERING DATA MODELING, SQL QUERIES, DATABASE DESIGN, NORMALIZATION, AND RELATIONAL DATABASE MANAGEMENT SYSTEMS.
Question :What are the three parts of a database model?
Correct answer:1. Data structures that prescribe how data
is organized. 2. Operations that manipulate data
structures. 3. Rules that govern valid data.
Question :What is the relational model and who
introduced it?
Correct answer:The relational model is a database model
based on a tabular data structure, introduced by E. F.
Codd of IBM in 1970.
2 | Page
Question :What was the initial impediment to the
commercial adoption of relational databases in the early
1980s?
Correct answer:Processing speed. Early relational
products were not as fast as more established nonrelational products.
Question :The relational model was originally developed
for which types of applications?
Correct answer:Transactional applications like banking
and airline reservations.

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