MCPA-LEVEL1 Web TestEngine Demo

Q1 Single choice

A system API is deployed to a primary environment as well as to a disaster recovery (DR) environment, with different DNS names in each environment. A process API is a client to the system API and is being rate limited by the system API, with different limits in each of the environments. The system API's DR environment provides only 20% of the rate limiting offered by the primary environment.

What is the best API fault-tolerant invocation strategy to reduce overall errors in the process API, given these conditions and constraints?

A
Invoke the system API deployed to the primary environment; add timeout and retry logic to the process
API to avoid intermittent failures; if it still fails, invoke the system API deployed to the DR environment
B
Invoke the system API deployed to the primary environment; add retry logic to the process API to
handle intermittent failures by invoking the system API deployed to the DR environment
C
In parallel, invoke the system API deployed to the primary environment and the system API deployed to
the DR environment; add timeout and retry logic to the process API to avoid intermittent failures; add
logic to the process API to combine the results
D
Invoke the system API deployed to the primary environment; add timeout and retry logic to the process
API to avoid intermittent failures; if it still fails, invoke a copy of the process API deployed to the DR
environment

MCPA-LEVEL1 Web TestEngine demo