POC Troubleshooting & Problem Resolution 2

Question 1

A Python script raises `RecursionError: maximum recursion depth exceeded`. What is the most appropriate fix?

Accepted Answer

Add a base case to terminate recursion

Answer

A missing or unreachable base case is the root cause of infinite recursion; adding one stops the runaway calls.

Question 2

You call `int('3.14')` and get a `ValueError`. How do you convert the string '3.14' to an integer correctly?

Accepted Answer

int(float('3.14'))

Answer

`int()` cannot parse a string containing a decimal point, so you must first convert to float then to int.

Question 3

A `KeyError` occurs when accessing `my_dict['name']`. Which approach gracefully handles a missing key?

Accepted Answer

my_dict.get('name', 'default')

Answer

`dict.get(key, default)` returns the default value instead of raising `KeyError` when the key is absent.

Question 4

Your script produces `IndentationError: unexpected indent`. What is the most likely cause?

Accepted Answer

Mixing tabs and spaces in the same block

Answer

Python treats tabs and spaces as different characters, so mixing them causes inconsistent indentation levels.

Question 5

A `TypeError: 'NoneType' object is not subscriptable` appears. What likely happened?

Accepted Answer

A function returned None and the result was indexed with []

Answer

This error means you tried to use subscript notation on a None value, often from a function that returns nothing explicitly.

(POC) Python Online Certification Practice Test