NPR vs Census:
Objective:
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The census involves a detailed questionnaire – there were 29 items to be filled up in the 2011 census – aimed at eliciting the particulars of every person, including age, sex, marital status, children, occupation, birthplace, mother tongue, religion, disability and whether they belonged to any Scheduled Caste or Scheduled Tribe
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On the other hand, the NPR collects basic demographic data and biometric particulars.
Legal Basis:
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The census is legally backed by the Census Act, 1948.
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The NPR is a mechanism outlined in a set of rules framed under the Citizenship Act, 1955.