Data Bases

A database is a tool whose purpose is to collect and organize information.

• False

• True

• Using Excel is preferred

• Text files are also worth for this

In the 60's and 70's one of the most important technological improvements of the time was:

• Online database

• Distributed systems

• Emergence of centralized DBs

• NoSQL DataBases

These two concepts define the main properties that a database must have

• Concurrrency

• Integrity

• Access in real time

• File set

Which of these characteristics is NOT among the main characteristics of Databases?

• Consistency

• Centralization

• Physical independence of data

• Data redundancy

Which of the following software is a database management system

• Access

• Excel

• Powerpoint

• Adobe

The entity-relationship model, also called conceptual data model, is a special graphical representation technique.

• True

• False

Select the one that is not a type of cardinality in E/R model

• 1:1

• 1:*

• 1:N

• N:M

How can we define a Table in a DataBase?

• A column set

• A row set

• A set of keys

• A set of registers

Regarding the players table (id, name, number, position) what would be a record?

• (id, name, number, position)

• (29018280, Leo Messi, 30, Striker)

• (Leo Messi, Striker)

• (Leo Messi, 29018280, Striker, 30)