Hackerrank Python Basics 4

Question 1

Which of the following creates a set in Python?

Accepted Answer

set()

Answer

`{}` creates an empty dict, so `set()` is the correct way to create an empty set.

Question 2

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

Accepted Answer

[2, 4, 6]

Answer

`map` applies the lambda to each element, doubling 1, 2, 3 to produce [2, 4, 6].

Question 3

Which exception is raised when dividing by zero in Python?

Accepted Answer

ZeroDivisionError

Answer

Python raises `ZeroDivisionError` specifically when the divisor is zero.

Question 4

What does `'abc' * 3` produce in Python?

Accepted Answer

'abcabcabc'

Answer

String repetition with `*` concatenates the string the given number of times.

Question 5

Which of the following correctly checks if `x` is NOT in a list `lst`?

Accepted Answer

Both A and B

Answer

Both `x not in lst` and `not x in lst` are valid; `not in` is the idiomatic form.

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