Question

what is a primary advantage of using cloud - based databases for data management?
a complete control over physical hardware
b reduced scalability
c limited availability
d pay - as - you - go pricing

Explanation:

Cloud - based databases offer several advantages. Pay - as - you - go pricing is a key financial benefit. Complete control over physical hardware (A) is not a cloud - based advantage as cloud users typically don't manage physical hardware. Reduced scalability (B) is incorrect as cloud databases are known for high scalability. Limited availability (C) is wrong as cloud services aim for high availability. Pay - as - you - go pricing (D) allows users to pay only for the resources they use, which is a primary advantage.

Answer:

D. Pay - as - you - go pricing