The answer is that both the try block and the close method threw exceptions. This is correct because in try-with-resources, when both the primary code and the resource's close() method fail, the exception from the try block is the one propagated to the caller, while the exception from close() is suppressed and attached to that primary exception. The output showing both exceptions confirms that both occurred, with the suppressed exception listed after the primary one. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this concept tests your understanding of exception suppression mechanics, a common trap being that candidates assume only one exception can be thrown. Remember the memory tip: "Primary gets thrown, suppressed gets shown" — the primary exception is what you catch, but suppressed exceptions are always listed in the stack trace as "Suppressed:" lines, so always check for them when debugging resource cleanup failures.
1Z0-829 Handling Exceptions Practice Question
This 1Z0-829 practice question tests your understanding of handling exceptions. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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
Refer to the exhibit.
Execution output:
Exception in thread "main" java.io.IOException: IO error
at Test.main(Test.java:10)
Suppressed: java.io.IOException: Close error
at Test$MyResource.close(Test.java:20)
Given the exhibit showing output from a program that uses try-with-resources, which of the following best describes the program?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Refer to the exhibit.
Execution output:
Exception in thread "main" java.io.IOException: IO error
at Test.main(Test.java:10)
Suppressed: java.io.IOException: Close error
at Test$MyResource.close(Test.java:20)
A
The try block threw an exception, but the resource closed successfully.
Why wrong: Close also threw an exception (suppressed).
B
Only the close method threw an exception, and the try block did not throw.
Why wrong: Primary exception from main indicates try threw.
C
Both the try block and the close method threw exceptions.
Both exceptions present; close exception is suppressed.
D
The close method threw an exception, and the try block completed normally.
Why wrong: Primary exception is from try block, not close.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both the try block and the close method threw exceptions.
Option C is correct because the output shows both a primary exception from the try block and a suppressed exception from the close method. In try-with-resources, if both the try block and the close method throw exceptions, the primary exception from the try block is propagated, and the close method's exception is added as a suppressed exception. The output displays both exceptions, confirming that both occurred.
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 try block threw an exception, but the resource closed successfully.
Why it's wrong here
Close also threw an exception (suppressed).
✗
Only the close method threw an exception, and the try block did not throw.
Why it's wrong here
Primary exception from main indicates try threw.
✓
Both the try block and the close method threw exceptions.
Why this is correct
Both exceptions present; close exception is suppressed.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The close method threw an exception, and the try block completed normally.
Why it's wrong here
Primary exception is from try block, not close.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the misconception that only one exception can be thrown, leading candidates to think that if a close method throws, the try block's exception is lost, but in reality both are captured via suppressed exceptions.
Detailed technical explanation
How to think about this question
In try-with-resources, when both the try block and the close method throw exceptions, the primary exception from the try block is thrown to the caller, and any exceptions from close methods are added as suppressed exceptions to the primary exception via Throwable.addSuppressed(). This mechanism ensures that the primary failure is not masked by resource-closing failures. The output's stack trace typically lists the primary exception first, followed by 'Suppressed: ...' for each close exception.
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 practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Handling Exceptions — This question tests Handling Exceptions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Both the try block and the close method threw exceptions. — Option C is correct because the output shows both a primary exception from the try block and a suppressed exception from the close method. In try-with-resources, if both the try block and the close method throw exceptions, the primary exception from the try block is propagated, and the close method's exception is added as a suppressed exception. The output displays both exceptions, confirming that both occurred.
What should I do if I get this 1Z0-829 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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