Whiteboard Function: Reverse or Filter | Dataford Interview Questions

Write a simple function on the whiteboard to reverse a string or filter an array.

Implement the string-reversal option. Given a string s, return a new string containing the same characters in reverse order. Preserve spaces, punctuation, letter case, and all character occurrences.

Use the signature def reverse_string(s):. The input is a string, and the output must be a string.

Constraints

0 <= len(s) <= 100000
s may contain letters, digits, spaces, punctuation, and Unicode characters
Return every input character exactly once in reverse order

Function Signature

def reverse_string(s):

Your question is Whiteboard Function: Reverse or Filter. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Write a simple function on the whiteboard to reverse a string or filter an array.

Use the signature def reverse_string(s):. The input is a string, and the output must be a string.

Constraints

0 <= len(s) <= 100000
s may contain letters, digits, spaces, punctuation, and Unicode characters
Return every input character exactly once in reverse order

Function Signature

def reverse_string(s):

Your question is Whiteboard Function: Reverse or Filter. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.