CAT 2025 Reading Comprehesnion | SET 1 Question 2

Question

Question 2
: The passage suggests that contact tracing apps could inadvertently raise risky interactions by altering local behaviour. Which one of the assumptions below is most necessary for that suggestion to hold?

Accepted Answer

Individuals base movement choices partly on observed infections and on the behaviour of others. So, local responses interact, which turns many small adjustments into large scale patterns that can frustrate the intended aim of risk reduction. — With regard to how contact tracing apps negatively impact our collective movement, the passage says, 'If each of us changes our behaviour to avoid the infected, we might generate a collective pattern we had aimed to avoid: higher levels of interaction between the infected and susceptible, or high levels of interaction among the asymptomatic.' In other words, local responses may interact to generate a collective pattern that goes against the original aim of the app. Option 1 is the correct choice.
All other choices are easily eliminated. Options 2 and 4 talk of 'city movement' and 'routing decisions', which are completely unrelated to the contents of the passage. Option 3, too is unrelated to the question.

Answer

Urban networks have uniform traffic conditions at all hours, which allows perfectly predictable routing independent of personal choices, social signals, or crowd reactions and, therefore, makes interdependence negligible in city movement decisions.

Answer

App alerts always include precise location to within one metre and deliver real time updates for all users, which ensures that the data feed is perfectly accurate regardless of privacy settings, power limits, or network conditions.

Answer

Most users uninstall apps within a week, which leaves only highly exposed individuals participating. This neutralises any systematic bias in routing decisions and prevents any predictable change in aggregate contact patterns.

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CAT 2025 Reading Comprehesnion | SET 1 Question 2

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