1Z0-829 Java I/O API and Securing Applications Practice Question
This 1Z0-829 practice question tests your understanding of java i/o api and securing applications. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A developer is designing a service that processes multiple files concurrently. To avoid resource leaks, which practice is essential?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use try-with-resources for each AutoCloseable resource
Option B is correct because try-with-resources guarantees that each AutoCloseable resource is closed automatically at the end of the statement, even if an exception occurs. This is essential when processing multiple files concurrently, as it prevents resource leaks without requiring explicit close() calls in finally blocks.
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.
✗
Ensure each thread has its own copy of the file handle
Why it's wrong here
Thread safety does not prevent resource leaks.
✓
Use try-with-resources for each AutoCloseable resource
Why this is correct
try-with-resources guarantees closure of each resource in the correct order, even with exceptions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Call close() on each stream in a separate try-catch block
Why it's wrong here
This is error-prone and can lead to leaks if an exception occurs before close.
✗
Use FileLock to prevent concurrent access
Why it's wrong here
FileLock prevents conflicts but does not handle resource cleanup.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think explicit close() calls in separate try-catch blocks are safer, but they overlook that try-with-resources handles suppression and automatic closure more reliably, especially in concurrent scenarios where resource leaks are harder to detect.
Detailed technical explanation
How to think about this question
Under the hood, try-with-resources compiles to code that calls close() in a finally block, and if both the try block and close() throw exceptions, the exception from close() is suppressed and added to the primary exception via Throwable.addSuppressed(). This is critical in concurrent file processing where multiple resources are opened, as it ensures all resources are released even if one fails, preventing file descriptor exhaustion in the operating system.
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.
Java I/O API and Securing Applications — This question tests Java I/O API and Securing Applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use try-with-resources for each AutoCloseable resource — Option B is correct because try-with-resources guarantees that each AutoCloseable resource is closed automatically at the end of the statement, even if an exception occurs. This is essential when processing multiple files concurrently, as it prevents resource leaks without requiring explicit close() calls in finally blocks.
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.
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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