Palindrome Check | Dataford Interview Questions

Check whether a string/number is a palindrome (recursive and non-recursive).

Asked in the Interview R1 stage. Implement both approaches and return whether the value reads identically from left to right and right to left.

Input and Output

Implement is_palindrome(value, recursive=False). value is a non-empty string or integer. Strings are compared exactly, including case and non-alphanumeric characters. Integers use their decimal representation; negative integers are not palindromes. Return a Boolean. When recursive is False, use an iterative solution. When it is True, use recursion.

Constraints

value is a non-empty string or integer
1 <= len(str(value)) <= 100000
Strings are compared exactly, including case and non-alphanumeric characters
Negative integers are not palindromes

Function Signature

def is_palindrome(value, recursive=False):

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