This 1Z0-811 practice question tests your understanding of arrays and methods. 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 writes two methods: public void process(int a) { ... } and public void process(double a) { ... }. Which method is called by process(10)?
The method with double parameter
Why wrong: Would require implicit widening conversion, but int version is more specific.
Compilation error: ambiguous call
Why wrong: No ambiguity because int version is a perfect match.
The method with int parameter
The int version is the best match for an int argument.
Runtime error: NoSuchMethod
Why wrong: Method exists and is resolved at compile time.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The method with int parameter
Option C is correct because Java selects the most specific overloaded method at compile time. When calling process(10), the integer literal 10 is an int, so the compiler prefers the method with the int parameter over the double parameter, as no implicit widening conversion is required.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The method with double parameter
Why it's wrong here
Would require implicit widening conversion, but int version is more specific.
Compilation error: ambiguous call
Why it's wrong here
No ambiguity because int version is a perfect match.
The method with int parameter
Why this is correct
The int version is the best match for an int argument.
Related concept
Read the scenario before looking for a memorised answer.
Runtime error: NoSuchMethod
Why it's wrong here
Method exists and is resolved at compile time.
Common exam traps
Oracle often tests the misconception that Java will always widen an int to a double when both overloads exist, leading candidates to incorrectly choose the double parameter method.
Detailed technical explanation
Under the hood, Java's overload resolution follows the Java Language Specification (JLS) §15.12.2, which selects the most specific method among candidates. If no exact match exists, widening conversions (e.g., int to double) are considered, but here the exact match takes precedence. In real-world scenarios, this prevents unexpected behavior when both int and double overloads are present, ensuring that integer arguments are handled by the int version for performance and precision.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Arrays and Methods — This question tests Arrays and Methods — Read the scenario before looking for a memorised answer..
The correct answer is: The method with int parameter — Option C is correct because Java selects the most specific overloaded method at compile time. When calling process(10), the integer literal 10 is an int, so the compiler prefers the method with the int parameter over the double parameter, as no implicit widening conversion is required.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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