What does the chr() function return when given an integer argument?

A string representation of the integer

The Unicode character corresponding to the integer code point

A developer is optimizing a function that builds a large string by concatenating many parts in a loop. The current implementation is slow. Which approach is most likely to improve performance?

Use a list to collect parts and join them at the end.

Use the `+=` operator more aggressively.

Use slicing to modify the string in place.

Use string repetition to build the parts.

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Domain 3Objective 2

PCAP-31-03 3.2 Operate on Strings PCAP-31 Practice Questions (Page 2)

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 6–10

6foundation · easy
What does the chr() function return when given an integer argument?
Select an answer first
7foundation · medium
Which expression evaluates to the string "ababab"?
Select an answer first
8foundation · easy
Which of the following calls to chr() would return the character 'a'?
Select an answer first
9application · medium
A developer needs to check whether a string `s` contains the substring 'py' anywhere in it. Which expression correctly performs this check?
Select an answer first
10expert · medium
A developer is optimizing a function that builds a large string by concatenating many parts in a loop. The current implementation is slow. Which approach is most likely to improve performance?
Select an answer first

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PCAP-31-03 3.2 Operate on Strings PCAP-31 Practice Questions (Page 2)

Questions 6–10

What does the chr() function return when given an integer argument?

Which expression evaluates to the string "ababab"?

Which of the following calls to chr() would return the character 'a'?

A developer needs to check whether a string `s` contains the substring 'py' anywhere in it. Which expression correctly performs this check?

A developer is optimizing a function that builds a large string by concatenating many parts in a loop. The current implementation is slow. Which approach is most likely to improve performance?

Keep studying — Strings