How should I practice Palindrome with One Deletion?

Start by reading the full statement, solve the visible examples, then compare the pattern against related WhatNot phone screen problems in FastPrep.

Is Palindrome with One Deletion associated with WhatNot?

FastPrep tags this as a WhatNot phone screen coding practice problem when the problem catalog has that company and stage context.

WhatNot● EasyFULLTIMEPHONE SCREEN

Given a string s, return true if it can become a palindrome after deleting at most one character. Otherwise, return false.

A palindrome reads the same from left to right and right to left. Keeping the string unchanged is allowed.

validPalindrome(s: String) → boolean

s = "abca"return = true

Deleting b gives aca; deleting c gives aba.

s = "abc"return = false

Each possible single deletion leaves two different characters.

s = "aba"return = true

The string is already a palindrome; no deletion is required.