Python Institute Associate Tester with Python (PCAT) Certification Sample Questions

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Python Institute PCAT Sample Questions:

01. What is the result of running this code?

def func(x):

assert x != 0, "Zero not allowed"

return 10 / x

print(func(0))

a) A ZeroDivisionError raised by the division that follows

b) An AssertionError with no message attached to it

c) A SyntaxError, reported when the module is compiled

d) An AssertionError carrying the message Zero not allowed

02. Which two practices break the Arrange, Act, Assert structure of a test method?

(Choose two.)

a) Moving the arrange work into setUp so every test in the class starts from it

b) Calling several unrelated operations in one method and asserting on all of them at the end

c) Naming the test method after the behavior it checks rather than after the method it calls

d) Asserting inside the arrange section, so a setup problem is reported as a failed check

03. A nightly run reports four failures, and the only information the on-call reader has is the failing test method names.

Which two naming practices make those report lines self-explanatory?

(Choose two.)

a) Use the same naming convention across every test module in the suite

b) Number the tests in the order they run, as test_01, test_02, and so on

c) Name each test for the condition under test and the outcome it expects

d) Keep every test name to a single word so the report lines stay narrow

04. Two defects were fixed in one module last week, and three more have since been reported in that same module while the rest of the application has reported none. Which of the seven testing principles does this pattern illustrate?

a) Pesticide paradox, since a test set that never changes stops finding new defects over time.

b) Absence-of-errors fallacy, since a product with no known defects can still fail to meet a real need.

c) Early testing, since defects found sooner in the life cycle are cheaper to remove than later ones.

d) Defect clustering, since a small number of modules usually contains most of the defects found.

05. Which two statements about the Python assert statement are accurate?

(Choose two.)

a) It records the failure and lets execution continue, so later checks in the same function still run.

b) It is removed under the -O flag, so it must never be used to validate production input.

c) It raises AssertionError when the expression it guards evaluates as false.

d) It is equivalent to TestCase.assertEqual, which is a thin wrapper written around it.

06. Analyze the following test:

def test_compute(self):

self.assertTrue(compute(3, 4))

What is the main weakness of this test?

a) It only establishes that the result is truthy, not that the result is right

b) It checks several conditions at once, hiding which one broke

c) It has no Arrange section, so the method is not collected

d) It uses assertTrue where assertEqual states the check more plainly

07. A developer mistypes a boundary comparison in a discount routine. The mistake is committed to the repository, and during a customer demonstration the application charges the wrong price.

Which two statements apply the terms error, defect and failure correctly to this situation?

(Choose two.)

a) The wrong price shown during the demonstration is a failure, an externally observable deviation from expected behavior.

b) The developer's slip while typing the comparison is a failure, because it was made by a person rather than by the code.

c) The wrong price shown during the demonstration is an error, an internal miscalculation the program made at run time.

d) The mistyped comparison now sitting in the repository is a defect, because the fault has been written into the code itself.

08. Three test methods each repeat the same six lines that build a customer record before acting on it.

Which principle is applied by moving those six lines into a single shared helper?

a) AAA (Arrange, Act, Assert), which fixes the order of a test's sections

b) The refactoring loop, which alternates small changes with a full test run

c) DRY (Don't Repeat Yourself), which keeps one copy of a piece of logic

d) KISS (Keep It Simple, Stupid), which favors the simplest structure that works

09. A test module repeats the same six-line customer record in nine tests, and one of those tests wraps its checks in a small rule interpreter that reads a table to decide what to assert.

Which changes apply the DRY and KISS principles to this module?

(Choose two.)

a) Add a layer of helper classes so that every assertion is reached through one common interface across the module.

b) Collapse the nine tests into one method that loops over the nine records, leaving the module with less code in it.

c) Move the repeated customer record into one factory function that each of the nine tests calls for the data it needs.

d) Replace the rule interpreter inside that test with the three plain assertions it was computing from the table.

10. Which two methods must a class define for its instances to be usable in a with statement?

(Choose two.)

a) __exit__()

b) __init__()

c) __del__()

d) __enter__()

Answers:

Question: 01 Answer: d	Question: 02 Answer: b, d	Question: 03 Answer: a, c	Question: 04 Answer: d	Question: 05 Answer: b, c
Question: 06 Answer: a	Question: 07 Answer: a, d	Question: 08 Answer: c	Question: 09 Answer: c, d	Question: 10 Answer: a, d

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