Coding (Platform)
angular · Easy · derived filter state
A catalog screen receives available facet values after every search. The current state boundary keeps selections that no longer exist, so the UI announces filters that cannot affect the visible result.
Normalize the query, remove unavailable selections, preserve the order of surviving selections, and derive the active-filter count used by the supplied screen adapter.
Facet state without impossible selections is a coding (platform) interview exercise that trains prompt interpretation, explicit assumptions, a concrete response, and a clear explanation of tradeoffs. The catalog marks it as easy difficulty. It focuses on State Modeling, Regression Testing, Technical Reasoning. The signed-in workspace provides the tools for the round and evaluates the attempt against task-specific criteria. Reference solutions, hidden checks, evaluator instructions, and candidate work remain private.