Android Code Challenges & Tips

1. Write a function to reverse a string in Kotlin.

2. Implement a method to check if a given list contains duplicates in Java.

3. Write a function that takes a list of integers and returns the maximum product of any two integers in the list in Kotlin.

4. Create a simple Android AsyncTask that fetches data from a given URL and returns it as a string.

5. Write a method to implement a basic Calculator (addition, subtraction, multiplication, division) in Java.

6. Implement a function that flattens a nested list of integers in Kotlin.

7. Write a method to perform a binary search on a sorted array in Java.

8. Create a RecyclerView adapter in Kotlin that displays a list of user profiles with name and age.

9. Write a function to implement the "Fibonacci Sequence" up to the nth number in Java.

10. Implement a method that checks if a given string is a palindrome in Kotlin.