Question 1
Fill in the code to complete the following method for checking whether a string is a palindrome.
public static boolean isPalindrome(String s) {
if (s.length() <= 1) // Base case
else if ________
else
| | return isPalindrome(s.substring(1, s.length() - 1)); |
}
◦ (s.charAt(0) != s.charAt(s.length())) // Base case
◦ (s.charAt(1) != s.charAt(s.length() - 1)) // Base case
◦ (s.charAt(0) != s.charAt(s.length() - 1)) // Base case
◦ (s.charAt(1) != s.charAt(s.length())) // Base case
Question 2
Analyze the following code:
public class Test {
public static void main(String[] args) {
| | int[] x = {1, 2, 3, 4, 5}; |
}
public static void xMethod(int[] x, int length) {
| | System.out.print(" " + x[length - 1]); |
}
}
◦ The program displays 5 4 3 2 1 and then raises an ArrayIndexOutOfBoundsException.
◦ The program displays 5 4 3 2 1.
◦ The program displays 1 2 3 4 6.
◦ The program displays 1 2 3 4 5 and then raises an ArrayIndexOutOfBoundsException.
Do-Ho Suh, Public Figures.
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