- A
A checked custom exception must be declared in the throws clause of any method that throws it.
Checked exceptions must be either caught or declared.
- B
A custom exception can be either checked or unchecked.
If it extends Exception (but not RuntimeException), it is checked; if it extends RuntimeException, it is unchecked.
- C
An unchecked custom exception must extend RuntimeException.
Unchecked exceptions are subclasses of RuntimeException or Error.
- D
A custom exception class must directly extend Throwable.
Why wrong: Custom exceptions typically extend Exception or RuntimeException, which indirectly extend Throwable.
- E
A custom exception cannot have constructors that call super.
Why wrong: Custom exceptions commonly have constructors that call super() with a message or cause.
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.
Which THREE statements about custom exceptions in Java are correct? (Select exactly 3)
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
A checked custom exception must be declared in the throws clause of any method that throws it.
Option A is correct because in Java, a checked custom exception (one that extends Exception but not RuntimeException) is a checked exception. The Java Language Specification (JLS) requires that any method which might throw a checked exception must either handle it with a try-catch block or declare it in its throws clause. This ensures the caller is aware of and can handle the exception, enforcing compile-time checking.
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.
- ✓
A checked custom exception must be declared in the throws clause of any method that throws it.
Why this is correct
Checked exceptions must be either caught or declared.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
A custom exception can be either checked or unchecked.
Why this is correct
If it extends Exception (but not RuntimeException), it is checked; if it extends RuntimeException, it is unchecked.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
An unchecked custom exception must extend RuntimeException.
Why this is correct
Unchecked exceptions are subclasses of RuntimeException or Error.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A custom exception class must directly extend Throwable.
Why it's wrong here
Custom exceptions typically extend Exception or RuntimeException, which indirectly extend Throwable.
- ✗
A custom exception cannot have constructors that call super.
Why it's wrong here
Custom exceptions commonly have constructors that call super() with a message or cause.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that custom exceptions must directly extend Throwable or that they cannot have constructors calling super, when in fact they can extend any appropriate subclass and commonly do call super to set the message and cause.
Detailed technical explanation
How to think about this question
Under the hood, Java's exception handling mechanism relies on the class hierarchy rooted at Throwable. Checked exceptions (subclasses of Exception but not RuntimeException) are enforced at compile time by the compiler, which checks throws clauses and try-catch blocks. Unchecked exceptions (subclasses of RuntimeException or Error) are not checked at compile time, allowing them to propagate without explicit handling. A real-world scenario: a custom checked exception like InsufficientFundsException in a banking application forces the developer to handle insufficient funds explicitly, preventing silent failures.
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.
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FAQ
Questions learners often ask
What does this 1Z0-811 question test?
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: A checked custom exception must be declared in the throws clause of any method that throws it. — Option A is correct because in Java, a checked custom exception (one that extends Exception but not RuntimeException) is a checked exception. The Java Language Specification (JLS) requires that any method which might throw a checked exception must either handle it with a try-catch block or declare it in its throws clause. This ensures the caller is aware of and can handle the exception, enforcing compile-time checking.
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.
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 →
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Last reviewed: Jun 25, 2026
This 1Z0-811 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-811 exam.
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