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Functions, Tuples, Dictionaries and Exceptions practice questions

Practise Certified Entry-Level Python Programmer PCEP Functions, Tuples, Dictionaries and Exceptions practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security
20 questionsDomain: Functions, Tuples, Dictionaries and Exceptions
Practice 10 questionsBrowse domain →

What the exam tests

What to know about Functions, Tuples, Dictionaries and Exceptions

Functions, Tuples, Dictionaries and Exceptions questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Functions, Tuples, Dictionaries and Exceptions exam traps

  • ▸Answering from memory before reading the full scenario.
  • ▸Missing a constraint such as cost, availability, security, scope or command context.
  • ▸Choosing a broad answer when the question asks for the most specific fix.
  • ▸Ignoring why the wrong options are tempting.

Practice set

Functions, Tuples, Dictionaries and Exceptions questions

20 questions · select your answer, then reveal the explanation

Question 1easymulti select
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Which THREE of the following dictionary methods return a view object that changes when the dictionary changes?

Question 2hardmultiple choice
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A function is defined as: def func(*args, **kwargs): print(args, kwargs). It is called as func(1, 2, a=3, b=4). What is printed?

Question 3mediummultiple choice
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A developer wants to raise a ValueError with a custom message when a negative number is passed. Which code is correct?

Question 4easymulti select
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Which THREE of the following are built-in exceptions in Python? (Select three.)

Question 5mediummulti select
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Which TWO of the following are valid dictionary methods? (Select two.)

Question 6easymultiple choice
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A developer wants to create a tuple containing a single integer value 5. Which code snippet correctly creates such a tuple?

Question 7hardmultiple choice
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Refer to the exhibit. What is the output of Line C?

Exhibit

def func(a, b, c=10, d=20):
    return a + b + c + d

print(func(1, 2, 3, 4))  # Line A
print(func(1, 2, 3))     # Line B
print(func(1, 2))        # Line C
Question 8easymultiple choice
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A developer writes a function to calculate the average of a list of numbers, but the function sometimes returns a wrong result when the list contains non-numeric values. What is the best way to handle this?

Question 9mediummultiple choice
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A Python script uses a dictionary to store user session data. The developer writes `user = {'id': 101, 'name': 'Alice'}` and later tries to access `user['email']`. What is the outcome?

Question 10hardmultiple choice
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A server logs are stored as a list of tuples: `logs = [('2024-01-10', 'INFO', 'Started'), ('2024-01-10', 'ERROR', 'Disk full')]`. A developer wants to count how many ERROR logs exist. Which code snippet correctly counts them?

Question 11easymultiple choice
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A function `def process(data):` modifies the dictionary passed as argument by adding a new key. The developer wants to avoid modifying the original dictionary. What should the function do?

Question 12mediummultiple choice
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A developer writes a function that returns multiple values as a tuple. Which of the following is a valid way to unpack the result into separate variables?

Question 13hardmultiple choice
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A Python script processes a list of tuples representing coordinates: `points = [(1,2), (3,4), (5,6)]`. The developer wants to create a dictionary mapping each coordinate to its distance from origin. Which code correctly creates the dictionary?

Question 14easymultiple choice
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A developer writes a function that takes a tuple as an argument and tries to modify an element inside the tuple. What happens?

Question 15mediummultiple choice
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A script uses a dictionary to store counts of words. The code `counts['apple'] += 1` raises a KeyError the first time because the key doesn't exist. Which approach best solves this?

Question 16mediummulti select
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Which TWO of the following statements about tuples in Python are true?

Question 17hardmulti select
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Which THREE of the following are valid ways to handle an exception in Python?

Question 18mediummultiple choice
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What is the output of the code?

Exhibit

Refer to the exhibit.

def divide(a, b):
    try:
        return a / b
    except ZeroDivisionError:
        return float('inf')
    except TypeError:
        return None

result = divide(10, '5')
print(result)
Question 19hardmultiple choice
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What is the output of this code?

Exhibit

Refer to the exhibit.

data = {'a': 1, 'b': 2, 'c': 3}
for key, value in data.items():
    if value % 2 == 0:
        data.pop(key)
print(data)
Question 20hardmultiple choice
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You are a developer for a financial application that processes transactions. The application uses a dictionary to store account balances where keys are account numbers (strings) and values are floats. A function `transfer(from_acc, to_acc, amount)` is supposed to subtract amount from `from_acc` and add it to `to_acc`. However, some transfers are resulting in incorrect balances: the `from_acc` balance is reduced but the `to_acc` balance is not increased. The code uses `try-except` to catch KeyError if an account does not exist. Upon inspection, the function first checks if both accounts exist, then performs subtraction, then addition, and finally returns success. No exceptions are raised during the problematic transfers. The accounts definitely exist. What is the most likely cause?

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Frequently asked questions

What does the PCEP exam test about Functions, Tuples, Dictionaries and Exceptions?
Functions, Tuples, Dictionaries and Exceptions questions test whether you can apply the concept in context, not just recognise a definition.
How should I use these practice questions?
Select your answer before revealing the explanation. Then read why each option is right or wrong — this active recall approach builds retention far faster than re-reading notes.
Can I practise just Functions, Tuples, Dictionaries and Exceptions questions in a focused session?
Yes — the session launcher on this page draws every question from the Functions, Tuples, Dictionaries and Exceptions domain. Use a 10-question session first to gauge your baseline, then move to 20 or 30 once the weak spots are clear.
Where can I practise other PCEP topics?
Use the topic links above to move to related areas, or go back to the PCEP question bank to see all topics.
Are these real exam questions or dumps?
These are original practice questions written to test the same concepts the PCEP exam covers. They are not copied from any real exam or dump site.