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Docs & OpenAPI interview questions

15 real Docs & OpenAPI questions from the FastAPI bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.

1. What is Automatic OpenAPI schema?

Junior
  1. A.the machine-readable API description generated from routes and models, served by default at /openapi.json
  2. B.labels assigned to endpoints to group them into named sections in the generated documentation
  3. C.short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  4. D.the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
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3. Which statement is correct?

Junior
  1. A.Automatic OpenAPI schema — the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  2. B.Automatic OpenAPI schema — the machine-readable API description generated from routes and models, served by default at /openapi.json
  3. C.Automatic OpenAPI schema — the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
  4. D.Automatic OpenAPI schema — short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
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4. What is Swagger UI?

Junior
  1. A.short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  2. B.the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  3. C.labels assigned to endpoints to group them into named sections in the generated documentation
  4. D.the machine-readable API description generated from routes and models, served by default at /openapi.json
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5. Which term means: "the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser"?

Junior
  1. A.Swagger UI
  2. B.ReDoc
  3. C.Automatic OpenAPI schema
  4. D.Summary and description
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6. Which statement is correct?

Junior
  1. A.Swagger UI — the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  2. B.Swagger UI — the machine-readable API description generated from routes and models, served by default at /openapi.json
  3. C.Swagger UI — the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
  4. D.Swagger UI — labels assigned to endpoints to group them into named sections in the generated documentation
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7. What is ReDoc?

Junior
  1. A.the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
  2. B.labels assigned to endpoints to group them into named sections in the generated documentation
  3. C.the machine-readable API description generated from routes and models, served by default at /openapi.json
  4. D.short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
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8. Which term means: "the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path"?

Junior
  1. A.ReDoc
  2. B.Swagger UI
  3. C.Summary and description
  4. D.Tags
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9. Which statement is correct?

Junior
  1. A.ReDoc — short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  2. B.ReDoc — the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  3. C.ReDoc — the machine-readable API description generated from routes and models, served by default at /openapi.json
  4. D.ReDoc — the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
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10. What is Tags?

Mid
  1. A.short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  2. B.the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  3. C.labels assigned to endpoints to group them into named sections in the generated documentation
  4. D.the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
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12. Which statement is correct?

Mid
  1. A.Tags — the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
  2. B.Tags — the machine-readable API description generated from routes and models, served by default at /openapi.json
  3. C.Tags — short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  4. D.Tags — labels assigned to endpoints to group them into named sections in the generated documentation
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13. What is Summary and description?

Mid
  1. A.the machine-readable API description generated from routes and models, served by default at /openapi.json
  2. B.short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  3. C.labels assigned to endpoints to group them into named sections in the generated documentation
  4. D.the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
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14. Which term means: "short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs"?

Mid
  1. A.ReDoc
  2. B.Automatic OpenAPI schema
  3. C.Swagger UI
  4. D.Summary and description
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15. Which statement is correct?

Mid
  1. A.Summary and description — short and long human-readable text, the latter often drawn from the handler's docstring, shown for an endpoint in the docs
  2. B.Summary and description — the machine-readable API description generated from routes and models, served by default at /openapi.json
  3. C.Summary and description — the alternative read-only, three-panel documentation page rendered from the same schema and reachable by default at its own path
  4. D.Summary and description — the interactive documentation page, served by default at /docs, that lets users try endpoints from the browser
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