1. What is serialization?

2. If the client is not satisfied with the support provided, how will you convince the client to use the product?

3. Palindrome String Validation Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols. Note: The string 'S' should be evaluated in a case-insensitive manner. Example: Input: "c1 O$d@eeD o1c" Output: "Yes" Explanation: After removing special characters and spaces, and converting to lowercase, the string becomes "c1odeedo1c", which is a palindrome. Input: The first input line contains an integer 'T', the number of test cases.Each of the following 'T' lines contains the string 'S'. Output: For each test case, print "Yes" if 'S' is a palindrome or "No" if it's not, on a new line. Constraints: 1 ≤ T ≤ 100 1 ≤ Length(S) ≤ 104 The time limit for processing is 1 second.

4. In Java, how would you find all the most frequently occurring characters in a given string using only arrays?

5. Given a sorted array, find a specific element using the binary search approach.