Exam PCAP-31-03 topic 1 question 83 discussion

A. ❌ Invalid – 'python'.sorted() 'sorted' is not a string method; it's a built-in function. → AttributeError B. ✅ Valid – "python".rindex("th") .rindex("th") searches for "th" from the right and returns the index of the first character if found. → "python" → "th" starts at index 2 → Correct C. ❌ Invalid – sort("python") sort() is a list method, not a standalone function. "python" is a string → TypeError or NameError D. ✅ Valid – "python".find("") .find("") returns 0, as the empty string is considered found at the beginning. → Correct

Explanation: The correct answers are: B. "python".rindex("th") The rindex() method finds the last occurrence of a substring in a string and returns its starting index. If the substring is not found, it raises a ValueError. Example:

result = "python".rindex("th")
print(result) # Outputs: 2 D. "python".find("") The find() method returns the lowest index where the specified substring is found.
 An empty string ("") is always considered present in any string, starting at index 0.
 Example:

result = "python".find("")
print(result) # Outputs: 0