A credit card with the last few numbers visible is an example of what?

What term describes two re-identifiable data sets that both come from the same unidentified individual?

When analyzing user data, how is differential privacy applied?

All of the following can be indications of a ransomware attack EXCEPT?

SCENARIO
Clean-Q is a company that offers house-hold and office cleaning services. The company receives requests from consumers via their website and telephone, to book cleaning services. Based on the type and size of service, Clean-Q then contracts individuals that are registered on its resource database - currently managed in- house by Clean-Q IT Support. Because of Clean-Q's business model, resources are contracted as needed instead of permanently employed.
The table below indicates some of the personal information Clean-Q requires as part of its business operations:

Clean-Q has an internal employee base of about 30 people. A recent privacy compliance exercise has been conducted to align employee data management and human resource functions with applicable data protection regulation. Therefore, the Clean-Q permanent employee base is not included as part of this scenario.
With an increase in construction work and housing developments, Clean-Q has had an influx of requests for cleaning services. The demand has overwhelmed Clean-Q's traditional supply and demand system that has caused some overlapping bookings.
Ina business strategy session held by senior management recently, Clear-Q invited vendors to present potential solutions to their current operational issues. These vendors included Application developers and Cloud-Q's solution providers, presenting their proposed solutions and platforms.
The Managing Director opted to initiate the process to integrate Clean-Q's operations with a cloud solution (LeadOps) that will provide the following solution one single online platform: A web interface that Clean-Q accesses for the purposes of resource and customer management. This would entail uploading resource and customer information.
* A customer facing web interface that enables customers to register, manage and submit cleaning service requests online.
* A resource facing web interface that enables resources to apply and manage their assigned jobs.
* An online payment facility for customers to pay for services.
Considering that LeadOps will host/process personal information on behalf of Clean-Q remotely, what is an appropriate next step for Clean-Q senior management to assess LeadOps' appropriateness?