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Data Science, Vision and Language

Track quiz

Before the questions, here is the line to keep from each idea.

The line to keep from each of the four ideas
IdeaThe line to keep
The data science loopCollect and clean the data. Train a model. Improve it with fresh data.
Data that fits the questionA data-driven answer needs data that matches the question.
How a computer seesA vision system usually tidies the picture first. Then it finds features, and names, locates or follows objects.
How a computer readsNLP cuts text into words and tidies them. Then it works out grammar and meaning.

A canteen table lists one order twice by mistake. Which part of the loop fixes that?

  • Cleaning, because repeated rows are removed
  • Training, because the model learns the order
  • Checking with fresh data, because it finds new orders

A model was trained last year. This month its guesses are worse. What can help?

  • Nothing, because a trained model stays right
  • Deleting the old data, because it is old
  • Training again, because fresh data shows what is true now

A school wants to guess how many chairs a hall needs. Which data fits best?

  • The colour of the chairs
  • Past attendance at the hall
  • The price of the chairs

Cinema ticket sales are used to guess tomorrow's milk sales. Why may it fail?

  • The ticket numbers are too big
  • It does not describe milk sales
  • Sales cannot be used for guessing

A camera takes a picture. Which step usually comes next in a vision system?

  • Pre-processing
  • Object tracking
  • Object categorisation

A system boxes each bus in a photo of a bus stand. Which step is that?

  • Object categorisation
  • Object tracking
  • Object identification

Why is noise removed before edges are found?

  • Edges cannot be found in a clean picture
  • Noise makes a picture too small
  • Noise can look like a real edge

Which step cuts a sentence into words?

  • Stemming
  • Tokenisation
  • Lower-casing

Stemming chops the ends of words. What does it do to plays and played?

  • It makes both play
  • It makes both lower case
  • It cuts both into letters

The word date can mean a fruit or a calendar day. Which job picks the right meaning?

  • Cutting the text into words
  • Working out the meaning
  • Making every letter lower case

Tables, pictures and messages each have steps you can now follow. Next comes AI in Industries.

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This track

  1. 0 Start here
  2. 1 The data science loop
  3. 2 Data that fits the question
  4. 3 How a computer sees
  5. 4 How a computer reads
  6. 5 The big picture
  7. 6 Track quiz

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