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FC0-U71 Practice Question: A database administrator is designing a…
A database administrator is designing a normalized database for an e-commerce site. Which TWO actions represent best practices for normalization?
⚠ Common exam trap
Many exam-takers confuse normalization with simply splitting data arbitrarily (Option A) or think that storing pre-calculated values (Option E) improves performance, when in fact normalization prioritizes data integrity over denormalization for performance.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Removing duplicate data from tables by creating separate tables for each entity
Normalization aims to reduce data redundancy and improve data integrity by removing duplicate data and organizing it into separate, related tables. By creating separate tables for each distinct entity (e.g., Customers, Orders, Products), you eliminate repeating groups and ensure each fact is stored only once, which is a core principle of database normalization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Creating separate tables for each customer order without linking them
Why it's wrong here
This duplicates customer data and lacks referential integrity.
- ✗
Storing all product details in a single column as a list
Why it's wrong here
Storing multiple values in one column violates first normal form.
- ✓
Removing duplicate data from tables by creating separate tables for each entity
Why this is correct
This reduces redundancy and improves data integrity.
- ✓
Splitting customer information into Customers and Orders tables linked by a foreign key
Why this is correct
This reduces redundancy and is a key normalization step.
- ✗
Storing calculated totals in the same table to avoid joins
Why it's wrong here
Calculated values should be derived to avoid update anomalies.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.