Briefly answer the following questions:

A) Explain what is wrong with the given code. Describe the fault precisely by proposing a modification to the code.

B) If possible, give a test case that does not execute the fault. If not, briefly explain why not.

C) If possible, give a test case that executes the fault, but does not result in an error state. If not, briefly explain why not.

D) If possible give a test case that results in an error, but not a failure. If not, briefly explain why not. Hint: Dont forget about the program counter.

E) For the given test case below, describe the first error state. Be sure to describe the complete state. Hint: Dont forget about the program counter.

Test case: source = "All I know is that I know nothing"; word = "know"; Expected = 2

Counts the number of occurrence of a substring in another string *@param source string to use as a source of the match * @param word string which is a substring of the source * @return number of occurrences of word in source * @throws NullPointerException if source is null You can assume that neither source nor word contain punctuations (e.g., ?, comma etc.), except that multiple words in the source are separated by spaces. * private static int countOccurrence(String source, String word) \{ String[] temp = source.split(" "); int count =0; for (String str : temp) \{ if (word ==str){ count++; \} \} return count; \}