1. import java.util.*; 2. 3. public class LetterASort{ 4. public static void main(String[] args) { 5. ArrayList strings = new ArrayList(); 6. strings.add("aAaA"); 7. strings.add("AaA"); 8. strings.add("aAa"); 9. strings.add("AAaa"); 10. Collections.sort(strings); 11. for (String s : strings) { System.out.print(s + " "); } 12. } 13. } What is the result?
technology programming languages

  1. Compilation fails.

  2. aAaA aAa AAaa AaA

  3. AAaa AaA aAa aAaA

  4. AaA AAaa aAaA aAa

  5. aAa AaA aAaA AAaa

  6. An exception is thrown at runtime

Show answer
Correct Option: C
Explanation:

To solve this question, the user needs to know the basics of Java programming language and the concept of ArrayList and Collections.sort() method.

The program initializes an ArrayList of strings and adds four different string elements to it. Then, it uses the Collections.sort() method to sort the elements of the ArrayList in ascending order. Finally, it prints the sorted list of strings.

When comparing strings, the sort() method uses lexicographic ordering, meaning that it compares the strings character by character based on their Unicode values.

Now, let's go through each option and explain why it is right or wrong:

A. Compilation fails. This option is incorrect. The program is syntactically correct and will compile without errors.

B. aAaA aAa AAaa AaA. This option is incorrect. The sort() method sorts the strings in ascending order, so the correct output should start with AAaa, followed by AaA, then aAa, and finally aAaA.

C. AAaa AaA aAa aAaA. This option is correct. The sort() method sorts the strings in ascending order based on their Unicode values. Therefore, the correct output is AAaa AaA aAa aAaA.

D. AaA AAaa aAaA aAa. This option is incorrect. The correct output should start with AAaa, followed by AaA, then aAa, and finally aAaA.

E. aAa AaA aAaA AAaa. This option is incorrect. The correct output should start with AAaa, followed by AaA, then aAa, and finally aAaA.

F. An exception is thrown at runtime. This option is incorrect. There are no statements in the program that could throw any exceptions.

Therefore, the correct answer is:

The Answer is: C. AAaa AaA aAa aAaA

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