No explicit interview question or task is stated in the screenshots. The images show Java code snippets: 1. The first snippet demonstrates: - Creating a List of Lists of Strings representing auto numbers. - Using streams to flatten the list and print each element. - Using streams to create a Map where keys are the original strings and values are the strings with all digits removed. 2. The second snippet shows a method: ```java public static boolean isPerfectSquare(int n){ if (n < 0) return false; int sqrt = (int) Math.sqrt(n); return sqrt * sqrt == n; } ``` This method checks if a number is a perfect square. No direct question or task is provided in the screenshots.

The first code fragment demonstrates working with collections and streams in Java. A list of lists of strings is created, then flatMap is used to "flatten" the nested lists into a single stream of elements, which is then printed. Next, a Map is created where the key is the original string, and the value is the same string but with digits removed (using the regular expression \d to remove digits).

The second fragment is a method to check if a number is a perfect square. It takes the square root of the number, converts it to an int (discarding the fractional part), and then checks if the square of this integer equals the original number. If it does, the number is a perfect square.

Example of using the method:

System.out.println(isPerfectSquare(16)); // true
System.out.println(isPerfectSquare(20)); // false