If the provisioned read capacity units (RCUs) are consistently underutilized for a NoSQL Database Cloud...

C. Unnecessary cost expenditure:

In Oracle NoSQL Database Cloud Service, you pay for the provisioned RCUs regardless of actual usage.

Consistently underutilized RCUs mean that you are incurring costs without fully utilizing the allocated resources.

Proper capacity planning is crucial to optimize costs.

To reduce expenses, monitor utilization and adjust RCUs accordingly.

Why the other options are incorrect:

A. Improved query performance:While having adequate RCUs prevents throttling, over-provisioning does not inherently enhance performance.

B. Increased storage efficiency:Storage is independent of RCUs, which relate to read throughput.

D. Reduced data durability:Durability is not impacted by underutilized read capacity.