# If you’ve seen a little line of text on websites | CAT VARC Questions- Parajumble

### CAT Verbal Ability

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## CAT 2019 – Slot -1 - Question 4 - If you’ve seen a little line of text on websites...

Q. 4: 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 cooccurrences of behaviors are tracked and then used to make recommendations.

It is clear that the paragraph is about “Collaborative filtering.” Sentence 4 defines collaborative filtering and is our introductory sentence.

Sentence 1 follows by giving an example of collaborative filtering that occurs on websites.

Sentence 2 highlights a flaw in the process of collaborative filtering and sentence 3 gives an example of this type of flaw. Sentence 2 mentions how collaborative filtering algorithms do not take into account the nuances that might interfere with their accuracy while sentence 3 follows this with a suitable example, which is, 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.

Hence, the correct sequence is 4123.

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