Question 479 of 498
PCEP Practice Question: Functions, Tuples, Dictionaries and Exceptions
Which TWO of the following are valid methods that can be called on a tuple object? (Choose two.)
⚠ Common exam trap
The PCEP exam often tests the distinction between mutable and immutable sequence types, trapping candidates who assume that because lists have methods like `.pop()`, `.append()`, and `.sort()`, tuples must have them too, when in fact tuples only support non-mutating methods like `.index()` and `.count()`.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
.index()
The `.index()` method is a built-in tuple method that returns the index of the first occurrence of a specified value. Tuples are immutable sequences, so they support only non-mutating methods like `.index()` and `.count()`, which do not modify the tuple.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
.pop()
Why it's wrong here
pop is a list method, not tuple.
- ✓
.index()
Why this is correct
index returns first index of a value.
- ✗
.append()
Why it's wrong here
append is a list method, not tuple.
- ✗
.sort()
Why it's wrong here
sort is a list method, not tuple.
- ✓
.count()
Why this is correct
count returns number of occurrences.
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Last reviewed: Jul 4, 2026
This PCEP practice question is part of Courseiva's free Python Institute certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCEP exam.
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