The answer is that the script failed to import the json module before calling json.loads(). This is the most likely root cause because the traceback’s NameError for ‘json.loads’ indicates the name ‘json’ is not defined in the script’s namespace, which happens when a module is used without a prior import statement. In file handling, the intended behavior of loading a JSON configuration file requires the json module to parse the file content, and its absence directly triggers the NameError exception. On the Certified Associate Python Programmer PCAP exam, this tests your understanding of Python’s namespace rules and module import mechanics, often appearing in file I/O and exception handling scenarios where a missing import is a common trap. A useful memory tip: if you see NameError for a module name, always check your imports first—think “NameError means Name not imported.”
PCAP Exceptions and File I/O Practice Question
This PCAP practice question tests your understanding of exceptions and file i/o. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Traceback (most recent call last):
File "app.py", line 9, in <module>
with open("config.json", "r") as f:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'config.json'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "app.py", line 11, in <module>
config = json.load(f)
^^^^^^^^^^^
NameError: name 'json' is not defined
Refer to the exhibit. A developer ran the script and saw the above traceback. The intended behavior was to load a JSON configuration file, and if the file is missing, create a default config. What is the most likely root cause of the second exception (NameError)?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Traceback (most recent call last):
File "app.py", line 9, in <module>
with open("config.json", "r") as f:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'config.json'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "app.py", line 11, in <module>
config = json.load(f)
^^^^^^^^^^^
NameError: name 'json' is not defined
A
The variable 'f' was not defined due to the FileNotFoundError.
Why wrong: The NameError is about 'json', not 'f'. The variable 'f' is defined only if open succeeds.
B
The script did not import the json module.
NameError: name 'json' is not defined indicates the import is missing.
C
The config.json file exists but is empty.
Why wrong: If the file existed but empty, the first exception wouldn't have occurred; the traceback shows FileNotFoundError.
D
The file was opened in binary mode instead of text mode.
Why wrong: The mode is 'r' (text), not binary; that would not cause NameError.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The script did not import the json module.
Option B is correct because the traceback shows a NameError for 'json.loads', which indicates that the name 'json' is not defined in the current namespace. This occurs when the script attempts to call json.loads() without first importing the json module. The intended behavior of loading a JSON configuration file requires the json module to parse the file content, and its absence causes the NameError exception.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The variable 'f' was not defined due to the FileNotFoundError.
Why it's wrong here
The NameError is about 'json', not 'f'. The variable 'f' is defined only if open succeeds.
✓
The script did not import the json module.
Why this is correct
NameError: name 'json' is not defined indicates the import is missing.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The config.json file exists but is empty.
Why it's wrong here
If the file existed but empty, the first exception wouldn't have occurred; the traceback shows FileNotFoundError.
✗
The file was opened in binary mode instead of text mode.
Why it's wrong here
The mode is 'r' (text), not binary; that would not cause NameError.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Python Institute often tests the distinction between file I/O exceptions (like FileNotFoundError) and name resolution errors (NameError), trapping candidates who focus on the file handling part of the traceback rather than recognizing that the second exception is about an undefined module name.
Trap categories for this question
Command / output trap
If the file existed but empty, the first exception wouldn't have occurred; the traceback shows FileNotFoundError.
Detailed technical explanation
How to think about this question
In Python, the json module is part of the standard library and must be explicitly imported via 'import json' before using its functions like json.loads() or json.dump(). The NameError is raised when the interpreter encounters an undefined name during execution, which in this case is 'json'. A common real-world scenario is when a developer forgets to add the import statement at the top of the script, especially when refactoring code or copying snippets from different contexts. The traceback's second exception (NameError) is a direct result of this missing import, not a file I/O issue.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Exceptions and File I/O — This question tests Exceptions and File I/O — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The script did not import the json module. — Option B is correct because the traceback shows a NameError for 'json.loads', which indicates that the name 'json' is not defined in the current namespace. This occurs when the script attempts to call json.loads() without first importing the json module. The intended behavior of loading a JSON configuration file requires the json module to parse the file content, and its absence causes the NameError exception.
What should I do if I get this PCAP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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