ICSE Class 10 Computer Applications project and internal assessment, done properly.

import java.util.*;
class p {
 void main() {
  Scanner s = new Scanner(System.in);
  String a = s.next(), b = "";
  for (int i = a.length()-1; i >= 0; i--)
   b = b + a.charAt(i);
  if (a.equals(b)) System.out.println("yes");
  else System.out.println("no");
 }
}
# No comments, no variable description,
# no output, and "Madam" prints "no"
# because case was never handled.

It compiles and mostly works, which is why it gets into files. It fails the question's own condition, so it loses execution marks on the one input that matters, and gives the examiner nothing to read but code.

// checks whether a word is a palindrome, ignoring case
class PalindromeWord {
  public static void main(String[] args) {
    java.util.Scanner in = new java.util.Scanner(System.in);
    System.out.print("Enter a word: ");
    String word = in.next().toUpperCase();
    String rev = "";
    for (int i = word.length() - 1; i >= 0; i--)
      rev = rev + word.charAt(i);   // build reverse
    if (word.equals(rev))
      System.out.println(word + " is a palindrome");
    else
      System.out.println(word + " is not a palindrome");
  }
}
Variable description
word  String  the word, in upper case
rev   String  the word reversed
i     int     loop index, last char to first
Output  Enter a word: Madam
        MADAM is a palindrome

A clear name, comments, the case condition handled with toUpperCase(), a variable description and a real run on the tricky input. Each criterion is visibly met, and the student can explain every line because they wrote it in class.