Context Manager

This quiz tests your understanding of Context Managers in Python tools that help manage resources like files and connections efficiently using the with statement.

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Question 1

What is the primary benefit of using the with statement when handling files in Python?

  • It allows multiple files to be opened simultaneously

  • It improves file reading speed

  • It ensures automatic resource cleanup

  • It adds encryption to file content

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Question 2

Which of the following will correctly open and automatically close a file using a context manager?

  • file = open("data.txt", "r")

  • with open("data.txt", "r"):

  • open("data.txt", "r").close()

  • try open("data.txt", "r"):

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Question 3

What happens if a file is not properly closed after being opened in a script?

  • The file is automatically deleted

  • You may run out of memory

  • It could cause resource leakage

  • Nothing, it always closes automatically

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Question 4

What are the required methods in a custom context manager class?

  • __open__() and __close__()

  • __start__() and __end__()

  • __init__() and __cleanup__()

  • __enter__() and __exit__()

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Question 5

What does the __enter__() method typically do in a custom context manager?

  • Returns a cleanup function

  • Yields data one item at a time

  • Acquires the resource and returns it

  • Closes the file

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Question 6

In the following code, what happens after the with block finishes?

Python 
with open("log.txt", "w") as file:
    file.write("Logging data")


  • File remains open

  • File is automatically closed

  • File data is lost

  • Exception is raised

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Question 7

What does the @contextmanager decorator from contextlib allow?

  • Manual file handling with error checking

  • Using generators to create context managers

  • Converting lists to file objects

  • Auto-closing all open files

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Question 8

What is the output of this context manager class?

Python 
class Demo:
    def __enter__(self):
        print("Enter")
    def __exit__(self, *args):
        print("Exit")

with Demo():
    print("Inside")


  • Inside

  • Enter Inside Exit

  • Enter Exit Inside

  • Exit Inside

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Question 9

What happens if an exception is raised inside a with block managed by a context manager?

  • The context manager crashes

  • The file remains open

  • __exit__() still runs and can handle the error

  • Python skips cleanup

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There are 9 questions to complete.

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