Hierarchical vs. Network Database Quiz

What is the degree of a relation in a relational database?

The degree of a relation is the number of attributes.

What is a primary key in a relational database?

A primary key is an attribute column whose value uniquely identifies a particular record in the relation.

How are relations connected to each other in a relational database?

Relations are connected to each other through keys.

What is the purpose of joining tables in a relational database?

Joining tables allows for querying across different relational tables through common fields. Signup and view all the answers

Explain the term 'foreign key' in the context of a relational database.

A foreign key is a column in a table that corresponds to a primary key in another table, establishing a relationship between the two tables. Signup and view all the answers

How are records represented in a relation in a relational database?

Each row in a relation represents a record, and each column represents an attribute. Signup and view all the answers

What is the main purpose of a database in terms of data redundancy?

To control data redundancy Signup and view all the answers

What does a relational database need to offer in terms of service?

Continual, uninterrupted service Signup and view all the answers

Why is it important for a database to have built-in integrity checks?

To ensure correct items are entered Signup and view all the answers

What is a key characteristic of a reliable database?

Correct & Consistent Signup and view all the answers

How should a database be able to evolve over time?

Cope with changing technology Signup and view all the answers

Why is it important for a database to be technology-proof?

To ensure only authorized users have access Signup and view all the answers

What is the main advantage of a Relational Database Management System (RDBMS)?

Data can be accessed without reorganization of tables. Signup and view all the answers

Explain how tables are connected in a Relational Database Management System (RDBMS).

Tables are connected through keys. Signup and view all the answers

What is a Relational Database?

A collection of relations that can be linked through keys. Signup and view all the answers

What type of data structure does a Relational Database Management System (RDBMS) use?

Tables Signup and view all the answers

What is the key feature that distinguishes RDBMS from other database models?

No pointers or hierarchy information is stored. Signup and view all the answers

How does RDBMS handle object properties or attributes?

Column contains object properties or attributes. Signup and view all the answers