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Which of the following updates a single attribute and saves the record (in Ruby on Rails)?

29. Which of the following updates a single attribute and saves the record?

1. update_columns(attributes)
2. update!(attributes)
3. update_column(name, value)
4. update_attribute(name, value)

Answer: D) update_attribute(name, value)

Explanation:

update_attribute(name, value) updates a single attribute and saves the record.