Hackerrank Python Basics 3

Question 1

Which keyword is used to define an anonymous (lambda) function in Python?

Accepted Answer

lambda

Answer

The `lambda` keyword creates small anonymous functions without a full `def` statement.

Question 2

What does `range(2, 10, 3)` produce?

Accepted Answer

[2, 5, 8]

Answer

`range(2, 10, 3)` starts at 2, steps by 3, and stops before 10: 2, 5, 8.

Question 3

Which of the following is a valid dictionary comprehension?

Accepted Answer

{k: v for k, v in items}

Answer

Dictionary comprehensions use curly braces with a `key: value` expression followed by `for`.

Question 4

What happens when you access a dictionary key that does not exist using `dict['key']`?

Accepted Answer

Raises KeyError

Answer

Accessing a missing key with bracket notation raises a `KeyError` exception.

Question 5

Which method removes and returns the last element of a list?

Accepted Answer

pop()

Answer

`list.pop()` without arguments removes and returns the last element of the list.

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