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Collaborative Filtering Para Jumble

CAT 2019 Slot 1 · Verbal Ability & Reading Comprehension · Easy · Verbal Ability

This is an easy Verbal Ability & Reading Comprehension question from the CAT 2019 Slot 1 paper. It tests Verbal Ability. The full answer key and a step-by-step explanation are below — try it yourself first, then reveal the solution.

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The four sentences (labelled 1, 2, 3, 4) given below, when properly sequenced would yield a coherent paragraph. Decide on the proper sequence of the order of the sentences and key in the sequence of the four numbers as your answer.

  1. If you've seen a little line of text on websites that says something like "customers who bought this also enjoyed that" you have experienced this collaborative filtering firsthand.
  2. The problem with these algorithms is that they don't take into account a host of nuances and circumstances that might interfere with their accuracy.
  3. If you just bought a gardening book for your cousin, you might get a flurry of links to books about gardening, recommended just for you! – the algorithm has no way of knowing you hate gardening and only bought the book as a gift.
  4. Collaborative filtering is a mathematical algorithm by which correlations and co occurrences of behaviors are tracked and then used to make recommendations.
Answer

4123

Explanation

Sentence 4 defines collaborative filtering. Sentence 1 gives a real-world example of it ('customers who bought this...'). Sentence 2 introduces a limitation/problem with these algorithms. Sentence 3 gives a concrete example illustrating that problem (buying a gift). Thus, 4123 is the correct order.

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