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Inheritable attributes are characteristics or properties of an object in an object-oriented programming language that can be passed down from a parent object to its child objects. Inheritance allows child objects to inherit the attributes and behavior of their parent objects, promoting code reuse and maintaining a hierarchical relationship between objects.

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What is key attribute and non key attributes?

A key attribute is an attribute that uniquely identifies a record in a database table. Non-key attributes are attributes that are not used to uniquely identify records, but provide additional information about the data.


What is the difference between meta data and attributes?

Metadata provides information about a piece of data, such as its size, format, or author. Attributes, on the other hand, are characteristics or properties of an entity, object, or file that define its features or behavior. In essence, metadata describes the data itself, while attributes describe specific qualities or traits of an entity.


What is a non key attribute in normalization?

An attribute is another name for a field in a table. Some attributes are used as keys to help specifically identify individual records,like a code number or reference number for example. Most attributes are not used as keys. Any of those are non-key attributes.


What is the relationship between entities and attributes?

Entities and attributes unable you to explicitly define what information, or data, is beingstored in the database. Relationships are the other powerful feature of relational modelingand give the modeling technique its name. A relationship is a logical linkage between twoentities that describes how those entities are associated with each other. Think ofrelationships as the logical links in a database that turn simple data into useful information.For instance, our definition of a teacher reads: “A person employed by the college who isresponsible for instructing students in a class.”


What are the Names of the types of data models in an ER diagram in the proper sequence they should be created?

In an ER diagram, the types of data models created in sequence are entities, attributes, relationships, and constraints. Entities represent the real-world objects, attributes describe the properties of entities, relationships establish connections between entities, and constraints define rules for the relationships or attributes. This sequence helps in organizing the structure and relationships of the data model effectively.