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Even so, unstructured data makes up most of the information in the world today.

The three most common forms of unstructured data are images, audio and text.
Each form is gathered and used in different ways, as shown in the table below:

Type Common Examples How It Is Used?

Audio Voice recordings, songs, Voice assistants like Siri or Alexa
podcasts, phone calls understand spoken words. Music

apps can identify a song from a few
seconds of sound.

Images Photographs, X-rays, Doctors use AI to check X-rays for

drawings, satellite pictures signs of illness. Plant identification
apps use photos to name flowers.

Text Stories, emails, chat Chatbots read text to understand
messages, news articles questions. AI tools can summarise
a long article into a few short

sentences.

AI systems are being trained to handle all three types of unstructured data. For

example, when a voice assistant understands what you are saying, it is processing
audio data. When a photo app tells you the name of the bird sitting on your windowsill,
it is processing image data. These amazing abilities depend on huge amounts of

carefully collected data.

In a class of 30 students, 15 prefer math, 10 prefer science, and 5 like both. How
many students like either math or science, but not both?

a) 10 students b) 15 students

c) 20 students d) 25 students

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