To answer this question, we need to analyze the given code. However, since the code is not provided, we can only evaluate the given options based on their likelihood.
Option A) Compilation fails - This option suggests that there may be a compilation error in the code. However, since the code is not given, we cannot determine if there is a compilation error. Therefore, this option cannot be confirmed as correct or incorrect based on the information provided.
Option B) The program hangs at line 22 - This option suggests that the program gets stuck or freezes at line 22. Without the code, we cannot determine if this is true. Therefore, this option cannot be confirmed as correct or incorrect based on the information provided.
Option C) Out of Memory! is printed to the system console - This option suggests that the program encounters an out-of-memory error and outputs "Out of Memory!" to the system console. Without the code, we cannot determine if this is true. Therefore, this option cannot be confirmed as correct or incorrect based on the information provided.
Option D) An exception is thrown at runtime but there is no guarantee an alert will be shown to the user - This option suggests that an exception occurs during runtime, but it is not guaranteed that an alert will be shown to the user. This is a plausible scenario in many programming languages. Therefore, this option is a valid possibility.
Based on the given options and the likelihood of each scenario, Option D is the most reasonable answer. An exception is likely to be thrown at runtime, but there is no guarantee that an alert will be shown to the user.