Recall & Review
beginner
What is database normalization?
Database normalization is the process of organizing data to reduce duplication and improve data integrity by dividing large tables into smaller related tables.
Click to reveal answer
beginner
What is database denormalization?
Database denormalization is the process of combining tables or adding redundant data to improve read performance at the cost of some data duplication.
Click to reveal answer
beginner
Name one advantage of normalization.
Normalization reduces data redundancy, which helps keep data consistent and saves storage space.
Click to reveal answer
beginner
Name one advantage of denormalization.
Denormalization improves read speed by reducing the number of table joins needed to get data.
Click to reveal answer
intermediate
When would you choose denormalization over normalization?
When the system needs faster read queries and can tolerate some data duplication and complexity in updates.
Click to reveal answer
What is the main goal of database normalization?
✗ Incorrect
Normalization aims to reduce duplication and keep data consistent.
Which is a common effect of denormalization?
✗ Incorrect
Denormalization reduces joins, making reads faster.
Which scenario favors normalization?
✗ Incorrect
Normalization helps keep data consistent by avoiding duplication.
Denormalization can cause which of the following?
✗ Incorrect
Denormalization duplicates data, which can lead to inconsistencies.
Which is NOT a benefit of normalization?
✗ Incorrect
Normalization can slow reads due to more joins.
Explain the differences between database normalization and denormalization.
Think about data duplication and query speed.
You got /5 concepts.
Describe a real-life example where you would use denormalization instead of normalization.
Imagine a system where reading data fast is more important than perfect consistency.
You got /4 concepts.