Question

The AP Exam uses the following format to insert an item to a list and to generate a random integer from a to b, including a and b. INSERT (aList, i, value) RANDOM(a, b) Given the following code segment, how can you best describe its behavior? i 1 FOR EACH X IN list { REMOVE(list, i) random - RANDOM(1, LENGTH(list)) INSERT(list, random, x) i + i + 1 } O This code replaces everything in the list with random numbers. O This code shuffles the order of the numbers in the list by removing them and inserting them back in a random place. O This code removes all of the numbers in the list and inserts random numbers in random places in the list. O This code errors by trying to access an element at an index greater than the length of the list.

Answer 1

Answer: This code shuffles the order of the numbers in the list by removing them and inserting them back in a random place.

Explanation: Here's how the code works:

1. The i variable is initialized to 1. This variable keeps track of the index of the element in the list being processed.
   
2. The code uses a for loop to iterate over each element x in the list.
   
3. In each iteration, the code calls the REMOVE function to remove the current element at index i from the list.
   
4. The code then generates a random number between 1 and the length of the list (inclusive) using the RANDOM function, and assigns it to the random variable.
   
5. The code calls the INSERT function to insert the removed element x back into the list at index random.
   
6. The code increments the value of i by 1.
   
7. The process repeats until all elements have been processed and shuffled.

As a result, the original order of the elements in the list is changed and the elements are randomly reordered.