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Testing / Karate Framework Interview questions

Explain the execution flow of a Karate scenario from feature file to HTTP response?

When a scenario runs, Karate processes its steps sequentially, building up request state before finally triggering the HTTP call, then applying the assertions that follow.

sequenceDiagram participant Runner as Karate Runner participant Engine as Karate Engine (karate-js) participant HTTP as HTTP Client participant API as Target API Runner->>Engine: Load feature file, run Background Engine->>Engine: Evaluate Given steps (url, path, header, request) Engine->>HTTP: Execute When method (build final request) HTTP->>API: Send HTTP request API-->>HTTP: Return response HTTP-->>Engine: Populate response, responseStatus variables Engine->>Engine: Evaluate Then steps (status, match, assert) Engine-->>Runner: Report scenario pass/fail

Steps under Given accumulate request configuration, URL, path segments, headers, query params, and body, into an in-memory request object without sending anything yet. The When method <verb> step is what actually triggers the HTTP call, using everything accumulated so far. Once the response returns, Karate populates built-in variables like response, responseStatus, and responseHeaders, which the following Then steps then assert against.

If any step fails, whether a connection error, an unexpected status, or a failed match, the scenario stops immediately and is marked failed, with the remaining steps in that scenario skipped rather than executed.

Which step is responsible for actually sending the HTTP request?
If a step in the middle of a scenario fails:

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