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Grade 8 · unit review

Review: Coordinate Client and Server State

A service holds private work, serves an old cached v2 while source v3 exists, and retrieves 20 items in batches of 4. Identify the security check, freshness issue and request count.

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Unit review questions
1. Write the saved record on the service. Which responsibility is described?
Need a hint?
  • Identify where the described operation runs and whether the server must verify it independently.
  • A client-side restriction does not by itself protect server-held private data.
2. A server record holds the draft body. Which role is stated?
Need a hint?
  • Use the stated session identifier for request context and the work record for saved contents.
  • Possessing a session label in a diagram does not justify exposing another user’s work.
3. Known source v6 but returned v5. Classify the supplied request evidence.
Need a hint?
  • Compare the copy’s stated version and freshness rule with the requested resource.
  • A200 response can still deliver an old cached version.
4. Exact-fit model: 36 items, 6 items per request. How many requests?
Need a hint?
  • Divide total items by items per batch under the exact-fit model.
  • A smaller request count does not automatically prove faster or safer operation.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

A service holds private work, serves an old cached v2 while source v3 exists, and retrieves 20 items in batches of 4. Identify the security check, freshness issue and request count.

Work on paper or in your own document. Explain the choices you made.

  • Use only supplied fictional inputs and state the relevant rule.
  • Include labeled steps or evidence for each decision.
  • Name one limitation or tempting mistake.
  • Check that the result meets the task and revise a justified error.
Compare with a model response

The server must authorize private-work access independently of client controls. Servingv 2 is stale when verified source v3 is required. Exact-fit batching uses 20/4=5 requests, excluding retries and transport overhead.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.