Practice - 5 Tasks
Answer the questions below
1fill in blank
easyComplete the code to identify the main goal of normalization.
HLD
Normalization primarily aims to [1] data redundancy in a database.
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing 'increase' because it sounds like adding more data.
✗ Incorrect
Normalization is about reducing data duplication to improve consistency.
2fill in blank
mediumComplete the code to describe denormalization's effect on query speed.
HLD
Denormalization is used to [1] query performance by adding redundant data. Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Confusing denormalization with normalization effects.
✗ Incorrect
Denormalization adds redundancy to speed up data retrieval.
3fill in blank
hardFix the error in the statement about normalization forms.
HLD
The [1] Normal Form (1NF) requires that all table columns contain atomic values.
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Mixing up 1NF with 2NF or 3NF.
✗ Incorrect
1NF requires atomic (indivisible) values in each column.
4fill in blank
hardFill both blanks to complete the description of denormalization trade-offs.
HLD
Denormalization [1] data redundancy and [2] data consistency challenges.
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing 'reduces' because it sounds positive.
✗ Incorrect
Denormalization increases redundancy and can cause consistency issues.
5fill in blank
hardFill all three blanks to complete the example of normalization benefits.
HLD
In normalization, [1] tables are created to [2] data duplication and [3] update anomalies.
Drag options to blanks, or click blank then click option'
Attempts:
3 left
💡 Hint
Common Mistakes
Choosing 'single' because it sounds simpler.
✗ Incorrect
Normalization creates multiple tables to reduce duplication and prevent update errors.