1Z0-811 Exception Handling and Development Tools Practice Question
This 1Z0-811 practice question tests your understanding of exception handling and development tools. 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.
Exhibit
public class ResourceHandler {
public void process() throws IOException {
try (FileInputStream fis = new FileInputStream("data.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fis))) {
// read file
} catch (IOException e) {
throw e;
}
}
}
Refer to the exhibit. Which statement about this code is true?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The catch block is unnecessary.
Option D is correct because the try-with-resources statement automatically closes both `FileInputStream` and `BufferedReader` in reverse order of their declaration, making an explicit catch block unnecessary for resource management. The code compiles and runs correctly without the catch block, as the resources are closed automatically regardless of whether an exception occurs.
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 resource 'br' is not closed properly.
Why it's wrong here
Try-with-resources closes both resources automatically, in reverse order.
✗
The code will not compile because of the throws clause.
Why it's wrong here
The method declares it throws IOException, which is correct and compiles.
✗
The resource 'fis' is closed before 'br'.
Why it's wrong here
Resources are closed in the reverse order of declaration, so 'br' is closed first, then 'fis'.
✓
The catch block is unnecessary.
Why this is correct
The try-with-resources already ensures proper handling; the catch block just rethrows, making it redundant.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a catch block is required in try-with-resources, but the catch block is optional and only needed if you want to handle exceptions locally rather than propagating them with `throws`.
Detailed technical explanation
How to think about this question
Under the hood, try-with-resources desugars into a try-finally block where each resource's `close()` method is called in reverse order, and any exceptions from `close()` are suppressed if a primary exception is thrown. This pattern is defined by the `AutoCloseable` interface, which `BufferedReader` and `FileInputStream` implement, ensuring deterministic cleanup without manual finally blocks. In real-world file I/O, this prevents resource leaks and simplifies code, especially when chaining streams like `BufferedReader` wrapping a `FileInputStream`.
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 1Z0-811 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.
Exception Handling and Development Tools — This question tests Exception Handling and Development Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The catch block is unnecessary. — Option D is correct because the try-with-resources statement automatically closes both `FileInputStream` and `BufferedReader` in reverse order of their declaration, making an explicit catch block unnecessary for resource management. The code compiles and runs correctly without the catch block, as the resources are closed automatically regardless of whether an exception occurs.
What should I do if I get this 1Z0-811 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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