Hackerrank File I/O and Exception Handling 3

Question 1

What does the `tell()` method return when called on an open file object?

Accepted Answer

The current byte position of the file pointer

Answer

The file name

Answer

The total file size

Answer

The number of lines read so far

Question 2

Which mode opens a file for exclusive creation, failing if the file already exists?

Accepted Answer

'x'

Answer

'w'

Answer

'a'

Answer

'c'

Question 3

How do you define a custom exception class named `AppError` in Python?

Accepted Answer

class AppError(Exception):

Answer

class AppError(BaseException):

Answer

class AppError extends Exception:

Answer

exception AppError:

Question 4

What happens if an exception raised inside a `with` block is not handled?

Accepted Answer

The context manager's __exit__ is called, then the exception propagates

Answer

The context manager's __exit__ is never called

Answer

The exception is silently suppressed

Answer

The with block retries automatically

Question 5

What is the output of `f.read()` called a second time on a file already read to EOF?

Accepted Answer

An empty string ''

Answer

None

Answer

Raises EOFError

Answer

The full file content again

Question 6

Which built-in Python module provides the `suppress` context manager to silently ignore specific exceptions?

Accepted Answer

contextlib

Answer

builtins

Answer

exceptions

Answer

functools

Question 7

When writing text to a file with `f.write(s)`, what does the method return?

Accepted Answer

The number of characters written

Answer

None

Answer

True on success

Answer

The updated file size