- A
NullPointerException
Why wrong: Unchecked runtime exception.
- B
ArithmeticException
Why wrong: Unchecked runtime exception.
- C
IOException
Checked exception, must be handled or declared.
- D
IllegalArgumentException
Why wrong: Unchecked runtime exception.
Question 350 of 519
Identifying Checked Exceptions in Java
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.
Which of the following is a checked exception in Java?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
IOException
Option C is correct because IOException is a checked exception in Java. Checked exceptions are subclasses of Exception (excluding RuntimeException and its subclasses), and the compiler enforces that they are either caught or declared in the method's throws clause. IOException directly extends Exception, making it a checked exception that must be handled at compile time.
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.
- ✗
NullPointerException
Why it's wrong here
Unchecked runtime exception.
- ✗
ArithmeticException
Why it's wrong here
Unchecked runtime exception.
- ✓
IOException
Why this is correct
Checked exception, must be handled or declared.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
IllegalArgumentException
Why it's wrong here
Unchecked runtime exception.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse any exception that occurs at runtime with a 'checked exception', forgetting that only subclasses of Exception that are not subclasses of RuntimeException are checked, so they incorrectly select NullPointerException or ArithmeticException.
Detailed technical explanation
How to think about this question
Under the hood, Java's exception hierarchy is rooted in Throwable, with Exception and Error as direct subclasses. Checked exceptions (like IOException) are designed for recoverable conditions that a well-written application should anticipate, such as file not found or network failures. A common subtlety is that RuntimeException and its subclasses are unchecked, meaning they represent programming errors (e.g., null pointer, illegal argument) that could have been avoided with proper coding, and the compiler does not enforce handling.
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.
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FAQ
Questions learners often ask
What does this 1Z0-829 question test?
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: IOException — Option C is correct because IOException is a checked exception in Java. Checked exceptions are subclasses of Exception (excluding RuntimeException and its subclasses), and the compiler enforces that they are either caught or declared in the method's throws clause. IOException directly extends Exception, making it a checked exception that must be handled at compile time.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 more ways this is tested on 1Z0-829
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which of the following is a checked exception in Java?
easy- A.NullPointerException
- B.ArrayIndexOutOfBoundsException
- ✓ C.SQLException
- D.IllegalArgumentException
Why C: SQLException is a checked exception because it extends Exception directly (not RuntimeException). Checked exceptions must be either caught with a try-catch block or declared in the method signature using 'throws'. SQLException is thrown by JDBC API methods when database access errors occur, forcing the developer to handle potential SQL failures at compile time.
Variation 2. Which TWO of the following are checked exceptions in Java?
medium- ✓ A.SQLException
- B.ArithmeticException
- C.ArrayIndexOutOfBoundsException
- D.NullPointerException
- ✓ E.IOException
Why A: A is correct because `SQLException` is a subclass of `java.lang.Exception` (which is a checked exception class) and does not extend `RuntimeException`. Checked exceptions must be either caught or declared in the method signature; `SQLException` is commonly thrown when database access errors occur, such as connection failures or SQL syntax errors.
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Last reviewed: Jun 25, 2026
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