Database Schema Design Planning Quiz

1. What is the main advantage of using a composite primary key in a junction table?

It eliminates the need for foreign keys

It uniquely identifies each many-to-many relationship instance

It reduces the total number of tables required

It automatically enforces data validation

2. When designing a schema for a multi-tenant application, what is a key consideration?

All tenants must share identical table structures

Data isolation and security between tenants while optimizing storage

Avoiding the use of indexes to reduce complexity

Storing all tenant data in a single denormalized table

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4. Which indexing strategy is most suitable for columns frequently used in WHERE clauses and JOIN conditions?

Full-text indexing

B-tree indexing

Hash indexing

Bitmap indexing

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6. What does BCNF (Boyce-Codd Normal Form) ensure that 3NF does not always guarantee?

Every determinant is a candidate key

No transitive dependencies exist

All attributes are atomic

Foreign key relationships are defined

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8. Which approach to schema design prioritizes read performance over write efficiency?

Strict normalization

Denormalization and data redundancy

Eliminating all indexes

Using only surrogate keys

9. In database planning, what does the term cardinality refer to?

The number of rows in a table

The number of columns in a table

The number of relationships between entities

The number of possible instances in a relationship between entities

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11. Which normal form eliminates partial dependencies on composite primary keys?

First Normal Form (1NF)

Second Normal Form (2NF)

Third Normal Form (3NF)

Boyce-Codd Normal Form (BCNF)

12. Which normal form addresses the issue of anomalies caused by partial dependencies?

1NF

2NF

3NF

4NF

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14. In schema design, what does a surrogate key provide?

A business-meaningful identifier for end users

An artificially created unique identifier for internal use

Protection against SQL injection attacks

Automatic data compression in storage

15. Which statement about Third Normal Form (3NF) is correct?

It eliminates transitive dependencies on non-key attributes

It requires all attributes to be atomic

It removes all NULL values from tables

It mandates single-column primary keys only

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17. What is the primary purpose of creating an index on a database column?

To enforce referential integrity

To accelerate data retrieval and query performance

To automatically generate backup copies

To prevent NULL values in the column

18. Which of the following best describes denormalization in database design?

Reducing data redundancy to save storage

Intentionally introducing redundancy to improve query performance

Eliminating all foreign key relationships

Converting from relational to NoSQL format

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20. In an Entity-Relationship model, what does a crow's foot notation represent?

One-to-one relationship

One-to-many relationship

Many-to-many relationship

Weak entity relationship

DataSys+ Database Schema Design Planning Quiz

1. What is the main advantage of using a composite primary key in a junction table?

2.

What first name or nickname would you like us to use?

2. When designing a schema for a multi-tenant application, what is a key consideration?

3. A ______ is a specialized table that stores pre-computed results of a query to improve performance on complex analytical queries.

4. Which indexing strategy is most suitable for columns frequently used in WHERE clauses and JOIN conditions?

5. In ER modeling, a ______ entity depends on another entity for its existence and cannot be uniquely identified by its own attributes alone.

6. What does BCNF (Boyce-Codd Normal Form) ensure that 3NF does not always guarantee?

7. A ______ constraint restricts the values that can be inserted into a column based on a specified condition.

8. Which approach to schema design prioritizes read performance over write efficiency?

9. In database planning, what does the term cardinality refer to?

10. A ______ is a schema design technique that combines multiple related tables into one to reduce join operations.

11. Which normal form eliminates partial dependencies on composite primary keys?

12. Which normal form addresses the issue of anomalies caused by partial dependencies?

13. A ______ constraint ensures that every value in a foreign key column matches a primary key value in the referenced table.

14. In schema design, what does a surrogate key provide?

15. Which statement about Third Normal Form (3NF) is correct?

16. A ______ relationship occurs when an entity references itself through a foreign key.

17. What is the primary purpose of creating an index on a database column?

18. Which of the following best describes denormalization in database design?

19. A ______ key is a minimal set of attributes that uniquely identifies each tuple in a relation.

20. In an Entity-Relationship model, what does a crow's foot notation represent?