Model Data in Database

Why do architects create blueprints before constructing a building?

• To plan and understand the structure of the building before starting construction.

• To showcase their drawing skills to clients.

• To create a coloring book for children.

• To design a new logo for the construction company.

Explain the concept of normalization in database design using a real-world scenario.

• Normalization helps in reducing data redundancy, improving data integrity, and making the database more flexible and scalable.

• Normalization is not relevant in database design.

• Normalization makes the database less flexible and scalable.

• Normalization is used to increase data redundancy and decrease data integrity.

What is the difference between logical and physical data modeling in a company's database design?

• The size of the data stored in the company's database

• The color of the font used in the company's database

• The number of columns in the company's database

• The main difference between logical and physical data modeling is the level of abstraction and focus in the company's database design.

What is the most popular open-source Content Management System (CMS) used for building websites, and what are some of its key features?

• WordPress

• Joomla

• Drupal

• Magento

What is a database schema and why is it important in database management?

• A database schema is essential for organizing a library's collection of books and ensuring that each book is correctly categorized.

• A database schema is a physical representation of the layout of a house, detailing where each room is located and how they are connected.

• A database schema is a visual representation of the layout of a city, showing how streets, buildings, and parks are interconnected. It is crucial in urban planning to ensure efficient organization and development.

• A database schema is not required for organizing a collection of toys.

Explain the process of designing a new house.

• Remove all furniture

• Choose random paint colors

• Ignore the layout

• Identify rooms, plan layout, select materials, finalize design.

What are the primary keys and foreign keys in a library system?

• Primary keys can have duplicate values

• Primary keys uniquely identify books in the library, while foreign keys establish relationships between tables by referencing the primary key of another table.

• Foreign keys are used to check out books from the library

• Primary keys are used for categorizing books in the library

Explain the concept of cardinality in data modeling using a library example.

• Cardinality in data modeling refers to the size of the library

• Cardinality in data modeling refers to the color coding of books

• Cardinality in data modeling refers to the uniqueness of book titles within a library

• Cardinality in data modeling refers to the font style used in library catalogs

What is the purpose of indexing in a library catalog system?

• To organize books randomly

• To categorize books by color

• To arrange books by size

• To facilitate quick book search by title, author, or subject

How does denormalization impact database performance in a real-world scenario?

• Denormalization increases the need for joins and decreases read performance.

• Denormalization only impacts write performance, not read performance.

• Denormalization reduces the need for joins and improves read performance.

• Denormalization has no impact on database performance.