Reverse String and Unique Values | Dataford Interview Questions

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Problem

For a Tata Consultancy Services North America data-validation utility, process a string and a Python dictionary in one function. Return the string reversed and the dictionary values deduplicated while preserving the order of their first occurrence.

Formal Specification

Implement reverse_and_unique_values(text, data).

text is a string. Return its characters in reverse order.
data is a dictionary whose keys and values are strings. Examine values in normal dictionary iteration order.
Return a dictionary with two entries: reversed_text, containing the reversed string, and unique_values, containing a list of distinct values in first-seen order.
Treat values as equal when their string contents are equal.

Constraints

0 <= len(text) <= 10^5
0 <= len(data) <= 10^5
Every dictionary key and value is a string
Dictionary insertion order must be preserved

Function Signature

def reverse_and_unique_values(text, data):