Which of the following is wrong about how a REA diagram is used to design a relational database?

a.

For each many-to-many relationship of two entities, an extra table is created to link the two entities.

b.

For each one-to-many relationship of two entities, the primary key of the one side entity must be a foreign key in the other entity (on the many side).

c.

For each one-to-many relationship of two entities, the primary key of the many side entity must be a foreign key in the other entity (on the one side).

d.

Every distinct entity in the REA diagram is a table in the relational database.

Which one of the following would not be a big data source?

a.Relational databases (e.g. a hospital's database)

b.

Online markets (e.g. Trade Me, Airbnb)

c.

Search engine (e.g. Google search)

d.

Social media platforms (e.g. Facebook)

When you need to analyse a problem through data analytics, which of the following would take the longest time?

a.

Collecting data

b.

Mining data for patterns

c.

Building information models

d.

Creating reports

Which of the following is a false statement about big data?

a.

More tools will be created to deal with big data.

b.

Only big organisations have access to the tools for analysing big data.

c.

Certain big data can be vulnerable.

d.

Big data will continue to grow.