Hackerrank Python Basics 2

Question 1

What does the `//` operator do in Python?

Accepted Answer

Floor division (integer quotient)

Answer

The `//` operator performs floor division, truncating the result toward negative infinity.

Question 2

Which of the following correctly unpacks a tuple `t = (1, 2, 3)` into three variables?

Accepted Answer

a, b, c = t

Answer

Tuple unpacking assigns each element to a corresponding variable with `a, b, c = t`.

Question 3

What is the output of `bool([])` in Python?

Accepted Answer

False

Answer

An empty list is falsy in Python, so `bool([])` returns `False`.

Question 4

Which built-in function returns the number of elements in a list?

Accepted Answer

len()

Answer

`len()` is the built-in function that returns the number of items in a sequence or collection.

Question 5

What will `'hello'[1:4]` evaluate to?

Accepted Answer

'ell'

Answer

Slicing `[1:4]` extracts characters at indices 1, 2, and 3, yielding `'ell'`.

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