I received a call from HR and had three levels of interview. Four levels were scheduled, but after the third, they informed me that my background and qualifications did not match their requirements. Clearly, I did not perform as well as they expected. They could have been more straightforward.

From a given input JSON (nested JSON), create a list of all keys and another list of all values.

Print all possible sub-lists of a given list whose sum of elements will be equal to a specific number.

Generate the Fibonacci series for a given number.