Quick Answer
The answer is 'nohtyP'. This is correct because the slice notation [::-1] in Python uses a step value of -1, which instructs the interpreter to traverse the string from the last character to the first, effectively reversing the sequence. Since strings are immutable, this operation creates a new string object with the characters in reverse order while preserving the original case of each letter. On the Certified Associate Python Programmer PCAP exam, this concept tests your understanding of Python’s slice mechanics and sequence immutability, often appearing in questions that require you to predict output or identify valid slicing syntax. A common trap is confusing the start and stop indices with the step; remember that a negative step automatically reverses the traversal direction without needing to specify start or stop values. For a quick memory tip, think of the colon-colon-negative-one as a "reverse gear" for any sequence—just append [::-1] to flip the order instantly.
This PCAP practice question tests your understanding of strings. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Given the string 'Python', what is the result of 'Python'[::-1]?
'nohtyp'
Why wrong: Incorrect case; 'P' should be uppercase at end.
'NOHYP'
Why wrong: Not the reversed string.
'nohtyP'
Correct reversal: 'nohtyP'.
'Python'
Why wrong: No reversing applied.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
'nohtyP'
Option C is correct because the slice notation [::-1] creates a reversed copy of the string by using a step of -1, which traverses the sequence from the end to the beginning. Since strings in Python are immutable sequences of Unicode characters, this operation returns a new string with the characters in reverse order, preserving the original case of each character.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
'nohtyp'
Why it's wrong here
Incorrect case; 'P' should be uppercase at end.
'NOHYP'
Why it's wrong here
Not the reversed string.
'nohtyP'
Why this is correct
Correct reversal: 'nohtyP'.
Related concept
Read the scenario before looking for a memorised answer.
'Python'
Why it's wrong here
No reversing applied.
Common exam traps
Python Institute often tests whether candidates understand that [::-1] reverses the sequence without altering case, so the trap is assuming the step of -1 also applies case transformations like lowercasing or uppercasing.
Detailed technical explanation
Under the hood, Python's slice operation with a negative step invokes the sequence's __getitem__ method with a slice object, which internally computes indices using the length of the sequence. For strings, this creates a new string object in memory, making it O(n) in time and space. This technique is commonly used in palindrome checks or reversing user input without modifying the original data.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
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FAQ
Strings — This question tests Strings — Read the scenario before looking for a memorised answer..
The correct answer is: 'nohtyP' — Option C is correct because the slice notation [::-1] creates a reversed copy of the string by using a step of -1, which traverses the sequence from the end to the beginning. Since strings in Python are immutable sequences of Unicode characters, this operation returns a new string with the characters in reverse order, preserving the original case of each character.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This PCAP 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 PCAP exam.
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