ExamAdept

How can you define a generator function that yields squares of numbers up to a given limit?

A:

def square_generator(limit):
    for i in range(limit):
        yield i**2

B:

generator square_generator(limit):
    for i in range(limit):
        return i**2

C:

def square_generator(limit):
    return (i**2 for i in range(limit))

D:

generator square_generator(limit):
    return [i**2 for i in range(limit)]

Answer: A

The correct definition for a generator function that yields squares of numbers up to a given limit is shown in option A.

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How can you use the filter function to filter out even numbers from a list?

A:

filter(lambda x: x % 2 != 0, my_list)

B:

filter(lambda x: x % 2 == 0, my_list)

C:

filter(is_even, my_list)

D:

filter(is_odd, my_list)

Answer: A

The correct usage of the filter function to filter out even numbers is filter(lambda x: x % 2 != 0, my_list).

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How can you define a lambda function that adds two numbers?

A:

lambda x, y: x + y

B:

def add(x, y): return x + y

C:

lambda add(x, y): x + y

D:

lambda add: x + y

Answer: A

The correct syntax for a lambda function that adds two numbers is lambda x, y: x + y.

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What does the zip(*iterables) function do?

A:

It compresses files in a directory.

B:

It combines multiple iterables element-wise into tuples.

C:

It filters elements from an iterable based on a condition.

D:

It creates a zip archive of files.

Answer: B

The zip(*iterables) function in Python combines multiple iterables element-wise into tuples.

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What is the purpose of the __enter__ and __exit__ methods in a Python class?

A:

To define the initialization and cleanup methods of a class.

B:

To define methods for adding and removing elements in a class.

C:

To create context managers for resource management.

D:

To define methods for comparison operations in a class.

Answer: C

The __enter__ and __exit__ methods in a Python class are used to create context managers for resource management, allowing proper setup and cleanup.

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Questions for: Functions