Palindrome-testing Java program for an interview
It's enough to loop until word.length() / 2, as this will compare the first half with the second half, so no need to go until the end.

As you use word.length() multiple times, you could extract it to a helper variable.

There is a typo in the method name.

As for testing, yes, JUnit is the way to go. In a cloud IDE, you could create a helper method that takes a single string, calls isPalindrome and prints the result. That way you can test multiple cases easily, by adding one line per case. It's important to try to cover corner cases and potentially interesting cases, not just the "happy path". For example:


palindrome with even length
palindrome with odd length
single letter
empty string
non-palindromes


During an interview, it might also be worth mentioning the trade-off between comparing characters using .charAt, or using the array of characters returned by .toCharArray.