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Object-Oriented Databases Fundamentals

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Questions and Answers

What is an object in the context of object-oriented databases?

A real-world entity, such as a specific task, with its own state and behaviors.

What are the two main components of an object's state?

Properties (attributes) and behaviors (methods)

What is the purpose of a class in object-oriented databases?

To group all objects with the same properties and behaviors

What is the key difference between object-oriented databases and traditional relational databases?

Object-oriented databases store and manage objects directly, without tables, rows, columns, or foreign keys. Signup and view all the answers

What is the advantage of object-oriented databases in terms of querying complex data?

Fast queries with complex data Signup and view all the answers

What is the concept of abstraction in object-oriented databases?

Capturing the necessary information to perform desired functionality while excluding unneeded information. Signup and view all the answers

What is a key feature of object-oriented databases that supports code reuse and modularity?

Inheritance and polymorphism Signup and view all the answers

What is the concept of polymorphism in object-oriented databases?

A child class using class attributes like its parent class, while retaining its unique methods and attributes. Signup and view all the answers

What is a disadvantage of object-oriented databases compared to relational databases?

Limited support for SQL Signup and view all the answers

What is the purpose of the Object Definition Language (ODL) in object-oriented databases?

To define the structure of an Entity-relationship diagram Signup and view all the answers

What is the primary language used for querying object-oriented databases?

Object Query Language (OQL) Signup and view all the answers

What is a characteristic of ODL class definitions in object-oriented databases?

They look like Entity sets with binary relationships, plus methods Signup and view all the answers