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Grade 10: Computing subject test

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Subject practice test

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1. Neighbors of C. Undirected edges A-B, A-C, B-D, C-E, C-F. Which direct-neighbor set is requested?A,E,FA,EB,DC,F

2. Vertex F. Undirected edges A-B, A-C, B-D, C-E, D-F. Start B. Which layer contains the requested vertex?Layer 0Layer 1Layer 3Layer 2

3. Route has three edge costs 7,2,6 minutes. Total modeled time?9 minutes16 minutes15 minutes3 minutes

4. Time changes across morning and evening. Which omitted detail matters?Metric definitionVariable travel conditionsEdge availability updateAccessibility requirement

5. Rows item_id=H/count=4 and item_id=I/count=4 are supplied. Only item_id is required unique. What follows about their shared count?Accept under this key rule: a shared non-key count is allowed while H and I remain distinctReject: matching counts mean the primary keys are equalReject: both required item_ids are missingReject: the count must be unique under this rule

6. Child has no required parent value. Parents A,B,C. Each child must reference an existing parent. Classify the child reference.Accepted parent referenceMissing referenced parentNot enough schema informationMissing required reference

7. A fractional amount is forbidden by the stated token contract. Atomic model moves 3 tokens from A to B. Classify the recorded outcome.Roll back incomplete transferNo transfer requestedReject invalid input before changeCommit complete valid transfer

8. A requested field name must be checked against allowed identifiers. Which query-plan property is described?Fixed allowed structureIdentifier needs separate allowlistBound data parameterUnsafe string concatenation

9. Fictional policy: each false positive costs 2 points; each false negative 5 points. FP=6,FN=3. Total modeled error cost?27 points9 points36 points28 points

10. Labeled set: 15 actual positives; model detects 12 of them. Positive-category recall percentage?125%81%400%80%

11. Score −0.1. Contract: a valid score is a real number from 0 to 1 inclusive; reject anything outside that contract before using thresholds. For valid scores, score≥0.8 requires human review for action; 0.4≤score<0.8 holds for more evidence; score<0.4 does not act. Choose the documented action.Hold for more evidenceDo not actReject invalid scoreReview for action

12. Missing-input measure is absent from the log. Policy: review if missing-input rate>10%; otherwise continue monitoring; absent measurements stay unknown. Choose status.Outside stated metricMeasurement unknownReview trigger metContinue monitoring

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