Parse a query string in C#
C# interview exercise on Practical, difficulty 2 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Write ParseQuery(qs) that turns "?page=2&sort=name" into a list of (Key, Value) tuples in order. Accept a leading "?", skip empty segments, give a key without "=" an empty value, and split only at the first "=". No percent-decoding.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.