Track quiz

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