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Database Normalization

Computers

11th Grade

10 Questions

Database Normalization
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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 1NF in database normalization?

Each attribute in a relation must have a single value.

1NF requires all attributes to be composite.

Each attribute in a relation must have multiple values.

1NF stands for First Normal Form.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 2NF in database normalization?

2NF ensures that all attributes are fully functional dependent on the primary key.

2NF guarantees that all non-key attributes are partially dependent on the primary key.

2NF allows for redundancy in the database schema.

2NF ensures that all non-key attributes are fully functional dependent on the primary key.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 3NF in database normalization?

3NF ensures that every attribute is dependent on the primary key

3NF guarantees that there are no repeating groups of data

3NF in database normalization ensures that every non-prime attribute is non-transitively dependent on every candidate key.

3NF allows for partial dependencies between attributes

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between 1NF and 2NF?

1NF requires a composite key, while 2NF does not

1NF ensures each cell has a single value, while 2NF requires non-key attributes to be fully functionally dependent on the primary key.

1NF allows duplicate rows, while 2NF does not

1NF allows partial dependencies, while 2NF does not

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between 2NF and 3NF?

2NF allows partial key dependencies, unlike 3NF

2NF always leads to 3NF normalization

3NF eliminates transitive dependencies, while 2NF does not.

3NF is concerned with atomicity, while 2NF is not

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between 1NF and 3NF?

1NF deals with atomic values and repeating groups, while 3NF deals with transitive dependencies.

1NF deals with atomic values, while 3NF deals with repeating groups.

1NF deals with transitive dependencies, while 3NF deals with atomic values.

1NF deals with repeating groups, while 3NF deals with atomic values.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is database normalization important?

Database normalization increases data redundancy

Database normalization makes the database structure less efficient

Database normalization helps in reducing data redundancy, improving data integrity, and making the database structure more efficient.

Database normalization decreases data integrity

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