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Why do they also need an API?

A retail store has discovered a cost-effective solution for creating self-service kiosks. They can use existing check-out hardware and purchase a virtual customer service application.

Why do they also need an API?
A . To connect the check-out hardware to the public cloud.
B. To connect the new application with the legacy system.
C. To migrate all customer data for disaster recovery.
D. To update the check-out hardware remotely.

Answer: B

Explanation:

APIs can create new business value by connecting legacy systems (the checkout hardware) with new software (the virtual customer service application).

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