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Quiz de Modelado de Datos

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Quiz de Modelado de Datos

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Desafío de modelado de datos

Created by

Ruth Elena Sermeño De Campos
Ruth Elena Sermeño De Campos
El Salvador

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Quiz de Modelado de Datos
 

Quiz de Modelado de DatosOnline version

Desafío de modelado de datos

by Ruth Elena Sermeño De Campos
1

¿Qué representa una entidad en un modelo ER (Entidad-Relación)?

2

¿Qué define la relación en un diagrama ER?

3

¿Qué es una clave primaria?

4

¿Qué son las llaves foráneas?

5

¿Qué es la normalización en bases de datos?

6

¿Qué implica la 1NF (Primera Forma Normal)?

7

¿Qué es una relación de cardinalidad?

8

¿Qué diferencia hay entre modelo lógico y modelo físico?

9

¿Qué es una forma normal avanzada como la 3NF?

10

¿Qué papel cumple un diagrama ER en el diseño de BD?

Explicación

La entidad modela un objeto del mundo relevante para la información.

Las relaciones muestran cómo las entidades se vinculan entre sí.

La clave primaria distingue cada registro de forma única.

Las llaves foráneas unen tablas y mantienen la integridad referencial.

La normalización mejora consistencia y mantiene relaciones claras.

1NF exige atomicidad y estructura tabular simple.

Cardinalidad describe una a muchas, uno a uno, etc.

El modelo lógico define estructuras sin detalle de implementación.

3NF mejora la independencia de atributos no clave.

ERD sirve como plano para crear tablas, claves y relaciones.

 
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