Hackerrank Python Basics 3

Question 1

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

Accepted Answer

lambda

Answer

def

Answer

func

Answer

anon

Question 2

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

Accepted Answer

[2, 5, 8]

Answer

[2, 4, 6, 8]

Answer

[2, 5, 8, 11]

Answer

[3, 6, 9]

Question 3

Which of the following is a valid dictionary comprehension?

Accepted Answer

{k: v for k, v in items}

Answer

[k: v for k, v in items]

Answer

(k: v for k, v in items)

Answer

{k, v for k, v in items}

Question 4

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

Accepted Answer

Raises KeyError

Answer

Returns None

Answer

Returns an empty string

Answer

Raises IndexError

Question 5

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

Accepted Answer

pop()

Answer

remove()

Answer

delete()

Answer

discard()

Question 6

What is the correct way to open a file for writing in Python?

Accepted Answer

open('file.txt', 'w')

Answer

open('file.txt', 'r')

Answer

open('file.txt', 'a')

Answer

open('file.txt', 'x')

Question 7

What does the `*args` syntax in a function definition allow?

Accepted Answer

Any number of positional arguments

Answer

Keyword-only arguments

Answer

A fixed number of positional arguments

Answer

Default argument values