Impact of Computing

What this unit covers

The topics below follow the published CS Principles course framework for Unit 5. This unit is worth 21–26% of the exam, so budget your time against that rather than against how long the unit takes to teach.

Lessons in this unit

• The Digital Divide12 min · 3 objectivesDefine the digital divide and identify the factors that cause it · Explain how unequal access affects opportunity and participation · Recognize the difference between individual and societal impacts
• Bias in Computing Systems12 min · 3 objectivesExplain how bias can be embedded in algorithms and their training data · Describe real consequences of biased automated decisions · Identify ways bias can be detected and reduced
• Cybersecurity13 min · 3 objectivesIdentify common cyber threats such as phishing and malware · Explain how encryption and authentication protect data · Apply good security practices like strong, unique passwords and multifactor authentication
• Legal & Ethical Concerns12 min · 3 objectivesExplain intellectual property, copyright, and open-source licensing · Distinguish legal from ethical questions in computing · Describe privacy trade-offs of collecting and combining personal data

Formulas in Unit 5

What examiners penalize here

• When a scenario assumes "everyone has access," look for a **digital divide** harm. Effective answers name a cause (cost, rural infrastructure) and a societal impact (widened opportunity gap), often with a mitigation.
• Two exam essentials on bias: (1) bias often comes from the **data** a system was trained on, and (2) it must be **tested and audited** for — it does not disappear because a computer made the decision.
• Match each defense to its job: **encryption** protects data confidentiality in transit and storage; **authentication/MFA** verifies identity. Phishing and malware are threats; strong unique passwords and MFA are the everyday defenses.
• Beware of **data aggregation**: combining separate, innocuous pieces of personal data can reveal private facts and re-identify people. And remember that "legal" never automatically means "ethical" — the exam rewards recognizing both dimensions.

Practice CS Principles

Our practice bank is drawn from across the whole course rather than filtered to one unit, which is closer to how the exam asks anyway — it will not tell you which unit a question is testing.

Questions about this unit

All 5 units of AP Computer Science Principles

1. Unit 1 · Creative Development
2. Unit 2 · Data
3. Unit 3 · Algorithms & Programming
4. Unit 4 · Computer Systems & Networks
5. Unit 5 · Impact of Computing