Grokking Modern Mobile System Design Interview
Vote

0% completed

​

Feature Flag SDK

Design a feature-flag SDK that provides fast local evaluations, refreshes configuration, and explains why a value was returned.

A flag can select UI behavior or a rollout variant. It must not replace server authorization for a protected operation.

1. Define typed evaluation

initialize(config, context) -> readiness state
evaluate(flagKey, typedDefault, context) -> evaluation details
refresh() -> async refresh result
updateContext(context)
recordExposure(evaluation, actionContext)

.....

.....

.....

Like the course? Get enrolled and start learning!

Reading Progress

0%

Vote for new content