Question 1

How do you create a list in Python?

Accepted Answer

[1, 2, 3]. Square brackets [] create a list. Parentheses () create a tuple, curly braces {} create a set or dict, and <> is not valid Python syntax.

Question 2

What does len([10, 20, 30]) return?

Accepted Answer

3. len() returns the number of elements. The list [10, 20, 30] has 3 elements, so len() returns 3.

Question 3

Which keyword is used to define a function in Python?

Accepted Answer

def. Python uses 'def' to define functions. Unlike many languages, Python does not use 'function' as a keyword.

Question 4

Which of the following is immutable in Python?

Accepted Answer

tuple. Tuples are immutable — once created, their contents cannot be changed. Lists, dicts, and sets are all mutable.

Question 5

What is the correct way to add a single-line comment in Python?

Accepted Answer

# This is a comment. Python uses # for single-line comments. // is JavaScript/C style; /* */ is C/Java style; -- is SQL style.

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