Hackerrank File I/O and Exception Handling 4

Question 1

What does the `seek(0)` method do on a file object?

Accepted Answer

Moves the file cursor to the beginning

Answer

Closes the file and reopens it

Answer

Reads the first line of the file

Answer

Truncates the file to zero bytes

Question 2

Which exception is raised when you try to open a file that does not exist using `open('missing.txt', 'r')`?

Accepted Answer

FileNotFoundError

Answer

IOError

Answer

OSError

Answer

ValueError

Question 3

What is the output of the following code?
```python
try:
    x = int('abc')
except ValueError as e:
    print('caught')
finally:
    print('done')
```

Accepted Answer

caught
done

Answer

caught

Answer

done
caught

Answer

done

Question 4

Which mode string opens a binary file for both reading and writing without truncating it?

Accepted Answer

rb+

Answer

wb

Answer

ab+

Answer

xb

Question 5

What does `f.tell()` return?

Accepted Answer

The current position of the file cursor in bytes

Answer

The total size of the file in bytes

Answer

The number of lines read so far

Answer

The encoding of the file

Question 6

Which built-in function can be used to suppress a specific exception and continue execution silently?

Accepted Answer

contextlib.suppress

Answer

exception.ignore

Answer

try.pass

Answer

os.ignore_error

Question 7

What happens when you call `f.readlines()` on an empty file?

Accepted Answer

Returns an empty list []

Answer

Raises an EOFError

Answer

Returns None

Answer

Returns an empty string ''