The correct choice is the code fragment that creates a new FileInputStream, because that constructor throws a checked exception, FileNotFoundException, which must be handled or declared. In Java, checked exceptions are those that the compiler forces you to address—you must either catch them in a try-catch block or declare them in the method signature using the throws clause. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this concept frequently appears in questions about compilation errors, often testing your ability to spot which statements introduce a checked exception that the surrounding code fails to manage. A common trap is confusing checked exceptions with unchecked exceptions (like NullPointerException), which do not require explicit handling. Remember the mnemonic: “Checked means checked by the compiler—you must catch or declare.”
1Z0-829 Handling Exceptions Practice Question
This 1Z0-829 practice question tests your understanding of handling exceptions. 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
Refer to the exhibit.
Compilation output:
Error: unreported exception java.io.IOException; must be caught or declared to be thrown
at Test.main(Test.java:5)
Given the exhibit showing a compilation error at line 5 of Test.java, which of the following code fragments could be at that line?
Refer to the exhibit.
Compilation output:
Error: unreported exception java.io.IOException; must be caught or declared to be thrown
at Test.main(Test.java:5)
A
FileInputStream fis = new FileInputStream("test.txt");
FileInputStream constructor throws FileNotFoundException (subclass of IOException).
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
FileInputStream fis = new FileInputStream("test.txt");
Option A is correct because the code at line 5 is a checked exception (FileNotFoundException) that must be handled or declared. The compilation error indicates that the method containing line 5 does not handle or declare this checked exception, which is required by the Java compiler.
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.
✓
FileInputStream fis = new FileInputStream("test.txt");
Why this is correct
FileInputStream constructor throws FileNotFoundException (subclass of IOException).
Related concept
Read the scenario before looking for a memorised answer.
✗
int x = 5;
Why it's wrong here
No checked exception.
✗
try { ... } catch (Exception e) { }
Why it's wrong here
Handles the exception.
✗
System.out.println("Hello");
Why it's wrong here
No checked exception.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often forget that checked exceptions must be handled or declared, and mistakenly think any code that throws an exception will compile as long as it is inside a method, ignoring the compiler's requirement for checked exception handling.
Detailed technical explanation
How to think about this question
Checked exceptions (like FileNotFoundException, IOException) must be either caught with a try-catch block or declared in the method signature using 'throws'. The Java compiler enforces this at compile time to ensure that the programmer explicitly handles potential failures from I/O operations, database connections, or other recoverable errors. In real-world scenarios, forgetting to handle FileNotFoundException when opening a file is a common source of compilation errors.
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: FileInputStream fis = new FileInputStream("test.txt"); — Option A is correct because the code at line 5 is a checked exception (FileNotFoundException) that must be handled or declared. The compilation error indicates that the method containing line 5 does not handle or declare this checked exception, which is required by the Java compiler.
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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