A dictionary `temperatures = {'mon': 20, 'tue': 22, 'wed': 19}` records daily highs. The developer must compute the average temperature. Which code correctly calculates the average?

`avg = sum(temperatures) / len(temperatures)`

`avg = sum(temperatures.keys()) / len(temperatures)`

`avg = sum(temperatures.values()) / len(temperatures)`

`avg = sum(temperatures.items()) / len(temperatures)`

Given `d = {'a': 1, 'b': 2}`, what does `d.keys()` return?

A view of values: dict_values([1, 2])

A view of the keys: dict_keys(['a', 'b'])

A developer receives two parallel lists: `names = ['ada', 'bob']` and `ages = [36, 42]`. They must build a dictionary mapping each name to its age. Which approach creates the correct dictionary?

`people = {names[i]: ages[i] for i in range(len(names))}`

`people = dict(zip(names, ages))`

Python InstitutePCEP - Certified Entry-Level Python Programmer

Domain 3Objective 3

PCEP-30-02 3.3 Collect and Process Data Using Dictionaries PCEP-30 Practice Questions (Page 1)

Part of the Data Collections Tuples, Dictionaries, Lists, and Strings domain, which accounts for 25% of the PCEP-30 exam. Python Institute does not publish an official question count, but from its 45-minute exam (~20–30 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

9concepts

25%of the exam

Questions 1–5

1application · medium
A dictionary `temperatures = {'mon': 20, 'tue': 22, 'wed': 19}` records daily highs. The developer must compute the average temperature. Which code correctly calculates the average?
Select an answer first
2foundation · easy
Given `d = {'a': 1, 'b': 2}`, what does `d.keys()` return?
Select an answer first
3application · medium
A dictionary `session = {'user': 'alice', 'token': 'abc123'}` represents an active session. The developer must clear the session by removing ALL key-value pairs. Which code accomplishes this?
Select an answer first
4foundation · easy
Given `d = {'a': 1, 'b': 2}`, what is the result of `'a' in d`?
Select an answer first
5application · medium
A developer receives two parallel lists: `names = ['ada', 'bob']` and `ages = [36, 42]`. They must build a dictionary mapping each name to its age. Which approach creates the correct dictionary?
Select an answer first

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PCEP-30-02 3.3 Collect and Process Data Using Dictionaries PCEP-30 Practice Questions (Page 1)

Questions 1–5

A dictionary `temperatures = {'mon': 20, 'tue': 22, 'wed': 19}` records daily highs. The developer must compute the average temperature. Which code correctly calculates the average?

Given `d = {'a': 1, 'b': 2}`, what does `d.keys()` return?

A dictionary `session = {'user': 'alice', 'token': 'abc123'}` represents an active session. The developer must clear the session by removing ALL key-value pairs. Which code accomplishes this?

Given `d = {'a': 1, 'b': 2}`, what is the result of `'a' in d`?

A developer receives two parallel lists: `names = ['ada', 'bob']` and `ages = [36, 42]`. They must build a dictionary mapping each name to its age. Which approach creates the correct dictionary?

Keep studying — Data Collections Tuples, Dictionaries, Lists, and Strings