Hackerrank File I/O and Exception Handling

Question 1

Which built-in function is used to open a file in Python?

Accepted Answer

open()

Answer

file()

Answer

read()

Answer

load()

Question 2

What mode string opens a file for writing, creating it if it doesn't exist and truncating it if it does?

Accepted Answer

'w'

Answer

'r'

Answer

'a'

Answer

'x'

Question 3

What is the preferred Python idiom for opening a file to ensure it is properly closed afterward?

Accepted Answer

with statement

Answer

try/finally block

Answer

close() call in __del__

Answer

atexit handler

Question 4

Which file method reads all remaining lines of a file and returns them as a list of strings?

Accepted Answer

readlines()

Answer

read()

Answer

readline()

Answer

fetchall()

Question 5

What does the 'b' flag signify when added to a file mode (e.g., 'rb' or 'wb')?

Accepted Answer

Binary mode

Answer

Buffered mode

Answer

Blocking mode

Answer

Backup mode

Question 6

Which method moves the file pointer to a specific byte position within an open file?

Accepted Answer

seek()

Answer

tell()

Answer

move()

Answer

position()

Question 7

What exception is raised when Python cannot find the file you are trying to open?

Accepted Answer

FileNotFoundError

Answer

IOError

Answer

OSError

Answer

MissingFileError