Question $48$

Uber offers $\frac{a}{n}$ that is essentially a published guideline on how other developers can embed Uber into their own apps.

a$.$ Cloud Endpoints

b$.$ WebSockets protocol

c$.$ EDA $($Event$-$Driven Architecture$)$

d$.$ SOAP $($Simple Object Access Protocol$)$

e$.$ API $($application programming interface$)$