Collections in java, String manipulation programs Selenium Manual testing Puzzles

Questions ranged from test planning, types of testing, how would I test Amazon website, use cases to basic programming questions on Java and Selenium. Made me write code on an online IDE for Java. Most of the questions were related to my previous experiences and how would I approach a use case for testing. Were interested to understand the types of testing like Security testing, accessibility testing, localization testing and functional testing and their use cases Questions on Java: (Strings) - How to find if a string is a palindrome - Find all substrings of a given string - Find the longest palindrome of a given string - Difference between Assert and Verify - Most common exceptions - How do you pass control to a different page in POM - How do you find elements when IDs are dynamic - How do you handle alerts in selenium