Expert level python quiz

What will be the output of the following code: print('abc'.count('a', 0, 1))?

1

0

Error

None

What is the purpose of the `__del__()` method in Python?

It is used for object destruction

It initializes class attributes

It is used to finalize a class method

It prevents object deletion

Which of the following is true about the `asyncio` module in Python?

It allows asynchronous programming using coroutines

It is used for creating threads

It is used for file I/O operations

It simplifies multiprocessing

What will be the output of the following code: print(list(map(lambda x: x**2, range(3))))?

[0, 1, 4]

[0, 1, 2]

[1, 4, 9]

[0, 1, 3]

What is the time complexity of Python's built-in `list.append()` method?

O(1)

O(n)

O(log n)

O(n^2)

What is the purpose of the `yield from` expression in Python?

It allows you to delegate part of a generator's operations to another generator

It is used to return multiple values from a function

It is used to initialize a generator

It is used to create a closure

What will be the result of the following code: print(isinstance(3, (int, float)))?

True

False

Error

None

Which of the following is a feature of Python’s `multiprocessing` module?

It allows parallel execution of processes

It allows asynchronous function execution

It simplifies memory management in multithreading

It uses global interpreter lock (GIL)

What is the output of the following code: print(sorted([3, 1, 4, 1, 5], key=lambda x: x**2))?

[1, 1, 3, 4, 5]

[1, 1, 3, 4, 5]

[1, 1, 3, 4, 5]

[3, 1, 4, 1, 5]

Which of the following methods is used to create a weak reference to an object in Python?

weakref.ref()

ref()

del()

weak()