Tuple methods in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of count() method on a tuple

What is the output of this Python code?

t = (1, 2, 3, 2, 2, 4)
print(t.count(2))

Python

t = (1, 2, 3, 2, 2, 4)
print(t.count(2))

A 3

B 2

C 1

D 0

💡 Hint

The count() method returns how many times the given value appears in the tuple.

The number 2 appears three times in the tuple, so t.count(2) returns 3.

❓ Predict Output

intermediate

Output of index() method with repeated elements

What will this code print?

t = ('a', 'b', 'c', 'b', 'd')
print(t.index('b'))

Python

t = ('a', 'b', 'c', 'b', 'd')
print(t.index('b'))

A 2

B 3

C 4

D 1

💡 Hint

The index() method returns the first position of the value.

The first 'b' is at position 1 (counting from zero), so t.index('b') returns 1.

❓ Predict Output

advanced

What error does this code raise?

What error will this code produce?

t = (1, 2, 3)
print(t.index(4))

Python

t = (1, 2, 3)
print(t.index(4))

A ValueError

B IndexError

C TypeError

D KeyError

💡 Hint

The value 4 is not in the tuple, so index() cannot find it.

Calling index() with a value not in the tuple raises a ValueError.

❓ Predict Output

advanced

Output of count() with no matching elements

What does this code print?

t = ('x', 'y', 'z')
print(t.count('a'))

Python

t = ('x', 'y', 'z')
print(t.count('a'))

A 1

B None

C 0

D KeyError

💡 Hint

count() returns zero if the value is not found.

Since 'a' is not in the tuple, count() returns 0.

🧠 Conceptual

expert

Why can't you use append() on a tuple?

Which statement best explains why the tuple method append() does not exist?

A Tuples do not support any methods at all.

B Tuples are immutable, so their size and contents cannot be changed after creation.

C append() is only for strings, not tuples.

D append() is a method only for dictionaries.

💡 Hint

Think about whether tuples can be changed after you make them.

Tuples cannot be changed after creation, so methods that modify them like append() do not exist.