A developer is implementing a search that needs to find all positions where a substring `sub` appears in a string `s`. Which approach correctly returns a list of all starting indices?

[i for i, ch in enumerate(s) if ch == sub]

[i for i in range(len(s)) if s.startswith(sub, i)]

Which of the following statements about Python strings is true?

Strings are mutable but only within the same memory location.

Strings can be modified in place using indexing.

Strings can be changed by using the append() method.

Strings are immutable, so operations like concatenation create new strings.

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Domain 3Objective 2

PCAP-31-03 3.2 Operate on Strings PCAP-31 Practice Questions (Page 1)

Part of the Strings domain, which accounts for 18% of the PCAP-31 exam. Python Institute does not publish an official question count, but from its 65-minute exam (~25–45 total, ~5–8 in this domain), expect 2–3 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

10concepts

18%of the exam

Questions 1–5

1foundation · easy
What is the output of the following code? s = "Hello" print(s[1])
Select an answer first
2expert · medium
A developer is implementing a search that needs to find all positions where a substring `sub` appears in a string `s`. Which approach correctly returns a list of all starting indices?
Select an answer first
3foundation · easy
Given the string s = "Python", what is the result of s[-1]?
Select an answer first
4foundation · easy
Which of the following statements about Python strings is true?
Select an answer first
5application · medium
A data-cleaning script processes a string `s = 'abcdefghij'`. The developer needs to extract every second character starting from the beginning, producing 'acegi'. Which slice expression achieves this?
Select an answer first

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PCAP-31-03 3.2 Operate on Strings PCAP-31 Practice Questions (Page 1)

Questions 1–5

What is the output of the following code? s = "Hello" print(s[1])

A developer is implementing a search that needs to find all positions where a substring `sub` appears in a string `s`. Which approach correctly returns a list of all starting indices?

Given the string s = "Python", what is the result of s[-1]?

Which of the following statements about Python strings is true?

A data-cleaning script processes a string `s = 'abcdefghij'`. The developer needs to extract every second character starting from the beginning, producing 'acegi'. Which slice expression achieves this?

Keep studying — Strings