Python Core Syntax 4

Question 1

What is the output of `print(not not True)`?

Accepted Answer

True

Answer

Applying `not` twice negates the value twice, returning the original `True`.

Question 2

Which of the following creates an empty dictionary in Python?

Accepted Answer

{}

Answer

An empty pair of curly braces `{}` creates an empty dictionary; `set()` must be used for an empty set.

Question 3

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

Accepted Answer

'ell'

Answer

Slice `[1:4]` extracts characters at indices 1, 2, and 3 (stop index is exclusive), yielding `'ell'`.

Question 4

In Python, what does the `global` keyword do inside a function?

Accepted Answer

Allows modification of a variable defined in the global scope

Answer

The `global` keyword tells Python that a name refers to the global scope, allowing assignment to that global variable inside a function.

Question 5

What is the result of `list(range(2, 10, 3))`?

Accepted Answer

[2, 5, 8]

Answer

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

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