Higher Order Functiond and Regex

What is a lambda function in Python?

• A lambda function is an anonymous function defined with the lambda keyword, allowing for quick, inline function definitions.

• A lambda function is a method for defining classes in Python.

• A lambda function is a built-in Python library for data analysis.

• A lambda function is a type of variable in Python.

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

• lambda x, y: x - y

• lambda a, b: a * b

• lambda num1, num2: num1 / num2

• lambda x, y: x + y

What is the purpose of the map() function in Python?

• The purpose of the map() function in Python is to apply a function to every item in an iterable and return an iterator of the results.

• To filter items from an iterable

• To sort items in an iterable

• To create a new list from an existing list

How does the filter() function work in Python?

• filter() modifies the original iterable by removing elements.

• filter() filters elements from an iterable based on a function that returns True or False.

• filter() sorts elements in an iterable based on their values.

• filter() creates a new iterable without any conditions.

What does the reduce() function do in Python?

• The reduce() function reduces an iterable to a single value by applying a function cumulatively.

• The reduce() function filters elements from an iterable based on a condition.

• The reduce() function sorts an iterable in ascending order.

• The reduce() function splits an iterable into multiple values.

Can you provide an example of using map() with a lambda function?

• list(map(lambda x: x-1, range(5))

• list(map(lambda x: x+1, [1, 2, 3, 4]))

• map(lambda x: x*2, [1, 2, 3])

• list(map(lambda x: x**2, [1, 2, 3, 4]))

What is the output of the following code: list(map(lambda x: x**2, [1, 2, 3, 4]))?

• [1, 2, 3, 4]

• [1, 8, 27, 64]

• [0, 1, 4, 9]

• [1, 4, 9, 16]

How can you use filter() to get even numbers from a list?

• even_numbers = [x for x in my_list if x % 2 != 0]

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

• even_numbers = list(filter(lambda x: x > 0, my_list))

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

What is the syntax for using reduce() from the functools module?

• reduce(function, iterable)

• reduce(function, iterable, initializer)

• reduce(function, iterable[, initializer])

• reduce(iterable, function)

How do you import the reduce function in Python?

• from reduce import functools

• import functools.reduce

• import reduce from functools

• from functools import reduce