Computer ScienceISC Class 11 · Trends in Computing and Ethical Issues

AI, IoT, Virtual Reality and Augmented Reality (ISC Class 11 Computer Science)

Updated 17 October 2026 · Fact-checked

Artificial intelligence (AI) is the ability of computer systems to perform tasks that normally need human intelligence, such as learning from data, recognising patterns and making decisions; machine learning is the part of AI in which systems improve from examples. The Internet of Things (IoT) is a network of physical devices with sensors and software that collect and exchange data. Virtual reality (VR) creates a fully computer-generated environment; augmented reality (AR) overlays digital information on the real world.

Understand Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality

Artificial intelligence. Systems that learn from data, recognise patterns (images, speech), understand language, and make decisions and predictions. *Machine learning:* learning from examples instead of hand-written rules. *Uses:* voice assistants, recommendations, medical image analysis, translation, fraud detection, chatbots and generative AI that creates text or images. *Issues:* bias (unfair results from biased training data), privacy (large data collection), job changes, misinformation and deepfakes, accountability (who is responsible for an AI decision?) and the need for transparency.

Internet of Things. Everyday objects (thermostats, watches, vehicles, utility readers, farm sensors) with sensors, small processors and network connections that collect data and may act on it through actuators. *Examples:* smart home lights; fitness bands; soil-moisture sensors that start irrigation; smart energy monitors. *Benefits:* automation, remote monitoring, efficiency. *Concerns:* security of many weak devices, privacy of data, interoperability, dependence on the network.

Virtual reality. A fully computer-generated, immersive environment that replaces the real world; the user wears a headset and interacts with controllers or body movement. *Uses:* training simulators (pilots, surgeons), virtual field trips, games, architecture walk-throughs.

Augmented reality. Digital information or objects overlaid on the real world, seen through a phone camera, tablet or smart glasses. *Uses:* navigation arrows on a live street view, trying furniture in a room, interactive textbooks, maintenance guidance.

Basis	VR	AR
Environment	Entirely virtual	Real world plus overlay
Device	Headset	Phone, tablet or glasses
Real surroundings	Hidden	Visible
Example	Flight simulator	Furniture preview

Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality: key facts

AI accuracy: Accuracy % = Correct predictions / Total predictions x 100 | Per cent; Simple measure.
IoT data volume: Data per day = Devices x Readings per day x Bytes per reading | Bytes; Planning storage.
VR vs AR: VR: replaces the real world | AR: adds to the real world; Key contrast.

How to answer Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality questions

Match each technology to its defining feature and an example.

1Does the system learn from data? AI or machine learning.
2Are physical objects with sensors connected? IoT.
3Is the real world replaced or overlaid? VR or AR.
4Give one benefit and one concern.

Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

IoT data

Suppose a farm installs 500 sensors, each sending 2 readings a minute of 100 bytes.

How much data comes in per day?

Try it first, then show the solutionSolution

Readings per day = 500 x 2 x 1,440 minutes = 14,40,000.
Data = 14,40,000 x 100 bytes = 14,40,00,000 bytes = 144 MB (decimal megabytes).

Answer: About 144 MB per day.

Memory hook: Many small readings add up.

Tricks to remember Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality

Short memory aids. Say each one aloud once, then use it on a question the same day.

AI learns, IoT senses
AI = learning; IoT = connected sensors.
Use it when: Meaning.
VR replaces, AR adds
Virtual Reality replaces; Augmented Reality adds.
Use it when: Difference.
Bias in, bias out
Biased data give biased AI.
Use it when: AI issues.

Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Technology · 1 mark · MCQBoard level

A phone app that places a virtual sofa in your living room through the camera uses:
(a) virtual reality (b) augmented reality (c) a database only (d) a spreadsheet

Try it first, then show the solutionSolution

It overlays digital objects on the real room: AR.

Answer: (b) augmented reality

Example 2: Distinguish VR and AR · 3 marks · Short answerBoard level

Distinguish between VR and AR on three points with one example each. (3 marks)

Try it first, then show the solutionSolution

Environment: entirely virtual vs real plus overlay.
Device: headset vs phone or glasses.
Examples: flight simulator vs furniture preview.

Answer: VR is fully virtual, needs a headset (flight simulator); AR overlays digital items on the real world through a phone or glasses (furniture preview).

Example 3: AI accuracy · 4 marks · Short answerHarder board level

A model checks 200 medical images and classifies 188 correctly. Find its accuracy. A second model gets 92% right on 250 images; find the number correct and which model is more accurate. (4 marks)

Try it first, then show the solutionSolution

188 / 200 x 100 = 94%.
92% of 250 = 230 correct.
94% > 92%, so the first model is more accurate in percentage; the second got more images right in number (230 > 188) because it tested more.

Answer: 94%; 230 correct; the first model has higher accuracy (94% against 92%).

Example 4: IoT planning · 5 marks · Long answerHarder board level

A city places 2,000 smart streetlights, each sending 1 status message of 200 bytes every 30 seconds. Find the messages per day, the data per day in MB (decimal), and the data for 30 days. If each message used 3 times the data, what would the daily figure be? (5 marks)

Try it first, then show the solutionSolution

Messages per light per day = 24 x 60 x 2 = 2,880.
Total messages = 2,000 x 2,880 = 57,60,000.
Data per day = 57,60,000 x 200 = 115,20,00,000 bytes = 1,152 MB.
30 days = 34,560 MB = 34.56 GB.
3 times: 3,456 MB per day.

Answer: 57,60,000 messages; 1,152 MB a day; 34.56 GB in 30 days; 3,456 MB a day if messages are three times larger.

Example 5: Ethical case · 4 marks · Short answerHOTS / competency

A company uses an AI system to screen job applications, trained on past hiring data where most selected candidates were from one group. Identify two ethical issues and give two safeguards. (4 marks)

Try it first, then show the solutionSolution

Bias: the system may copy past unfairness.
Accountability and transparency: applicants cannot know why they were rejected.
Safeguards: audit the data and the outcomes for bias; keep a human reviewer and explain decisions.
Protect applicants' personal data.

Answer: Bias and lack of transparency/accountability; safeguards are bias audits of data and results and human review with explanations.

Where students lose marks in Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality

The slips examiners see most often, and what to write instead.

Mistake: Calling VR and AR the same
Both use headsets or screens.
Wrong working
AR replaces the real world
Right working
VR replaces; AR overlays
Do this: Check the real world remains visible.
Usually costs: 1-2 marks.
Mistake: Listing only benefits of AI
One-sided.
Wrong working
Faster and accurate
Right working
Also bias, privacy, accountability
Do this: Add issues.
Usually costs: 1 mark.
Mistake: Mixing IoT and the internet
Similar names.
Wrong working
IoT is the web
Right working
IoT is connected physical devices with sensors
Do this: Define by devices.
Usually costs: 1 mark.

Exam tips

Give an example for each technology.
Mention a benefit and an issue for AI and IoT.
Use the VR/AR table.

Practice questions on Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Machine learning is a branch of:
(a) hardware design (b) artificial intelligence (c) networking (d) word processing
Hint
Learning from data.
Answer
(b) artificial intelligence
Q2 · 3 marks · Short answerBoard level
State three applications of IoT with the sensor or data involved in each. (3 marks)
Hint
Home, farm, health.
Answer
Smart home lighting (motion sensors), precision farming (soil-moisture sensors) and fitness bands (heart-rate and step sensors).
Q3 · 4 marks · Short answerHarder board level
Explain bias in AI with an example and two ways to reduce it. (4 marks)
Hint
Training data.
Answer
Bias occurs when training data are unrepresentative, so results are unfair (a face-recognition system trained mostly on one group performs worse on others). Ways: use diverse and balanced data, and test the results for fairness with human oversight.
Q4 · 5 marks · Long answerHarder board level
A smart energy monitor sends a 150-byte reading every 15 minutes. Find the readings and bytes per day for one monitor, and the total data per month (30 days) for 10,000 monitors in MB (decimal). (5 marks)
Hint
96 readings per day.
Answer
Readings per day = 96; bytes per day = 14,400. For 10,000 monitors over 30 days: 14,400 x 10,000 x 30 = 4,320,000,000 bytes = 4,320 MB (4.32 GB).
Q5 · 4 marks · Short answerHOTS / competency
A school considers VR field trips instead of real trips. Evaluate with two advantages and two limitations, and say when AR would be a better choice. (4 marks)
Hint
Cost, safety, immersion.
Answer
Advantages: safe, cheaper and allows places hard to visit. Limitations: equipment cost and the lack of real experience or social interaction. AR is better when students must see the real surroundings with extra information, such as a museum label overlay.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.AI is?Show answer
Systems that perform tasks needing human intelligence.
2.IoT needs?Show answer
Sensors and network connections.
3.VR hides the real world?Show answer
Yes.
4.AR overlays on?Show answer
The real world.
5.A deepfake is?Show answer
AI-made fake media.

Artificial Intelligence, the Internet of Things, Virtual Reality and Augmented Reality: frequently asked questions

Is a chatbot AI?

Often, yes.

Is IoT secure by default?

No, devices need protection.

Can VR be used without a headset?

Basic forms use screens, but headsets are common.

What is generative AI?

AI that creates new text or images.