Python Quiz

431. What is the output of:

print([i for i in range(3)][-1])

3

2

-1

0

432. Which of these is the correct syntax to check if a class is a subclass of another?

A inherits B

A is B

issubclass(A, B)

A instanceof B

433. What is the result of this code?

x = (1,)
print(type(x))

<class 'int'>

<class 'tuple'>

<class 'list'>

<class 'NoneType'>

434. What will this print?

def f():
    yield from range(3)
print(list(f()))

[0, 1, 2]

[1, 2, 3]

[0, 1, 2, 3]

[1, 2]

435. Which one is **not** a valid way to merge two dictionaries in Python 3.9+?

a | b

a.update(b)

{**a, **b}

a + b

436. What is the output of:

print({i: i*i for i in range(3)})

{0: 0, 1: 1, 2: 4}

[0, 1, 4]

{0, 1, 4}

(0: 0, 1: 1, 2: 4)

437. What is the main use of the `__init__` method in a class?

To destroy an object

To create a method

To initialize the instance when created

To define a private method

438. What will be printed?

x = [1, 2, 3]
print(id(x) == id(x[:]))

True

False

Depends on Python version

Error

439. Which of the following statements about `@classmethod` is true?

It passes the instance as the first argument

It can only access class variables

It cannot access the class

It runs in a separate thread

440. Which of the following is true about Python's `with` statement?

Used only for file handling

Manages context and ensures proper cleanup

Only works with try-except blocks

Automatically closes the program