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Grade 4: Computing subject test

Try the supplied cases without hints first. Use paper for calculations, notes or drawings. Check all your answers together, then revisit the lessons you want to practice.

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Subject practice test

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

1. A paper pixel image has 6 rows and 7 columns. How many pixel positions need values?48 pixels49 pixels42 pixels13 pixels

2. Row BBA. Palette: A=dark, B=light. Decode the three-pixel row.Dark-light-lightLight-light-darkLight-dark-lightDark-dark-light

3. Sequence 3,2. Code: 1=A, 2=B, 3=C. Decode the supplied sequence.CBBCCAAB

4. The model stores 30 pixels at 3 bytes per pixel, with no other data. How many bytes?33 bytes91 bytes240 bytes90 bytes

5. A staff reviewer opens only the work assigned to them. Access labels: Owner=editing their own file; Viewer=reading an explicitly shared view-only copy; Guest=not signed in and limited to public pages; Assigned staff=reviewing work assigned to staff. Which label describes this specific access record?ViewerGuestAssigned staffOwner

6. Purpose is a short review that should end after its stated period. Choose access.No private accessTemporary assigned accessView onlyEdit one assigned file

7. A sudden billing message changes the established route. Choose first step.Verify independentlyUse the established public instructionsKeep a private credential privateReport the suspicious request

8. Password plus biometric check. Classify the supplied example.KnowledgePossessionInherenceDifferent categories combined

9. Screen rule: right adds x; down adds y. Start(3,3), move right 2 and down 4. Final position?(5,-1)(7,5)(5,7)(1,7)

10. Join text "Go", one explicit space, and text "Home". Choose the joined text.GoHomeGo HomeHome GoGo Home

11. SetOn,Toggle. Start sound=Off. What is the final state?OffOnUnspecifiedNo valid event

12. Display 3,1,2. Positions: 1=closed flower, 2=half-open, 3=open. Which sequence matches the listed positions?Closed-open-half-openOpen-half-open-closedHalf-open-closed-openOpen-closed-half-open

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