What happens when you call a user-defined function with fewer arguments than it has parameters?

The missing parameters are set to None.

The function runs but ignores the missing arguments.

The function runs with default values of zero.

A developer needs to process a stream of log entries, but the stream is too large to fit in memory. They write a generator function that reads lines from a file and yields only lines containing 'ERROR'. They then iterate over it with a for loop. Which statement about this approach is true?

The generator will raise a MemoryError because it processes a large file.

The generator must be converted to a list to be iterated over.

The generator loads the entire file into memory before yielding the first line.

The generator reads and yields lines one at a time, so only one line is in memory at a time.

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Domain 4Objective 1

PCEP-30-02 4.1 Decompose the Code Using Functions PCEP-30 Practice Questions (Page 1)

Part of the Functions and Exceptions domain, which accounts for 28% of the PCEP-30 exam. Python Institute does not publish an official question count, but from its 45-minute exam (~20–30 total, ~6–8 in this domain), expect 2–2 from this objective — we provide 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

7concepts

28%of the exam

Questions 1–5

1expert · hard
A developer is implementing a recursive function to calculate the sum of digits of a positive integer. They write: def digit_sum(n): if n < 10: return n return n % 10 + digit_sum(n // 10) What is the result of `digit_sum(1234)`?
Select an answer first
2expert · hard
A developer is writing a recursive function to reverse a string. They write: def reverse(s): if len(s) == 0: return s return reverse(s[1:]) + s[0] What is the result of `reverse('abc')`?
Select an answer first
3foundation · easy
Which keyword is used inside a generator function to produce a value and pause execution?
Select an answer first
4foundation · easy
What happens when you call a user-defined function with fewer arguments than it has parameters?
Select an answer first
5expert · hard
A developer needs to process a stream of log entries, but the stream is too large to fit in memory. They write a generator function that reads lines from a file and yields only lines containing 'ERROR'. They then iterate over it with a for loop. Which statement about this approach is true?
Select an answer first

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PCEP-30-02 4.1 Decompose the Code Using Functions PCEP-30 Practice Questions (Page 1)

Questions 1–5

A developer is implementing a recursive function to calculate the sum of digits of a positive integer. They write: def digit_sum(n): if n < 10: return n return n % 10 + digit_sum(n // 10) What is the result of `digit_sum(1234)`?

A developer is writing a recursive function to reverse a string. They write: def reverse(s): if len(s) == 0: return s return reverse(s[1:]) + s[0] What is the result of `reverse('abc')`?

Which keyword is used inside a generator function to produce a value and pause execution?

What happens when you call a user-defined function with fewer arguments than it has parameters?

A developer needs to process a stream of log entries, but the stream is too large to fit in memory. They write a generator function that reads lines from a file and yields only lines containing 'ERROR'. They then iterate over it with a for loop. Which statement about this approach is true?

Keep studying — Functions and Exceptions