Python Quiz

Question 1

Which of these Python types is immutable?

Accepted Answer

tuple

Answer

list

Answer

dict

Answer

set

Question 2

What does the list comprehension `[x*2 for x in range(3)]` produce?

Accepted Answer

[0, 2, 4]

Answer

[0, 1, 2]

Answer

[2, 4, 6]

Answer

[1, 2, 3]

Question 3

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

Accepted Answer

False

Answer

True

Answer

None

Answer

raises TypeError

Question 4

What does the Global Interpreter Lock (GIL) in CPython do?

Accepted Answer

Ensures only one thread executes Python bytecode at a time

Answer

Allows true parallel execution of threads

Answer

Locks global variables from modification

Answer

Prevents memory leaks

Question 5

What does `a = [1, 2]; b = a; b.append(3)` leave `a` as?

Accepted Answer

[1, 2, 3]

Answer

[1, 2]

Answer

[3]

Answer

raises an error

Question 6

What does `"hello"[1:4]` return?

Accepted Answer

"ell"

Answer

"hel"

Answer

"ello"

Answer

"hell"

Question 7

Which statement about Python dictionaries (3.7+) is true?

Accepted Answer

They preserve insertion order

Answer

They do not preserve insertion order

Answer

Keys must be integers

Answer

They allow duplicate keys

Question 8

What is a common pitfall of using a mutable default argument like `def f(x=[])`?

Accepted Answer

The default list is shared and persists across calls

Answer

It raises a SyntaxError

Answer

It is faster than `x=None`

Answer

The argument becomes immutable

Question 9

What does `5 // 2` evaluate to in Python 3?

Accepted Answer

2

Answer

2.5

Answer

3

Answer

2.0

Question 10

How do you create a set literal in Python?

Accepted Answer

{1, 2, 3}

Answer

{}

Answer

[1, 2, 3]

Answer

(1, 2, 3)

Python quiz

Which of these Python types is immutable?

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