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Computer ScienceIntermediateRevision 1

Data Systems & Security

See how indexes accelerate queries, how database systems organize work, and how cryptography supports practical system security.

5 stepsAbout 85 minutesConnect storage performance and security controls to their underlying trade-offs.

A lab, not a slideshow

How each chapter works

1 · Predict

Commit to what you think the system will do before pressing play.

2 · Observe

Change one variable and watch the state, algorithm, or model respond.

3 · Explain

State the invariant or principle, then prove it in the checkpoint.

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Next: Compare indexed and full scans

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  1. Next suggested
    Step 1

    Step 1Experiment

    Compare indexed and full scans

    Predict first, change one input, then explain the state change you observe.

    Open simulation
  2. Step 2

    Step 2Experiment

    Explore database system behaviour

    Predict first, change one input, then explain the state change you observe.

    Open simulation
  3. Step 3

    Step 3Experiment

    Experiment with cryptography

    Predict first, change one input, then explain the state change you observe.

    Open simulation
  4. Step 4

    Step 4Experiment

    Model defence in depth

    Predict first, change one input, then explain the state change you observe.

    Open simulation
  5. Step 5

    Step 5Prove

    Data systems and security checkpoint

    Use the evidence from the chapter to pass a server-scored knowledge check.

    Take knowledge check