The correct statements are A, B, and D. This is because primitive type conversion in Java follows strict rules: widening conversions, such as int to long or char to int, happen automatically since the target type can hold a larger range of values, while narrowing conversions, like double to int, require an explicit cast because data loss is possible. On the Oracle Java Foundations 1Z0-811 exam, this topic tests your understanding of type compatibility and the distinction between implicit and explicit conversions, often appearing in multiple-select questions where common traps include assuming boolean can be cast to a numeric type or forgetting that float to long is narrowing and thus needs a cast. A helpful memory tip is to remember that widening is automatic like pouring water into a bigger bucket, while narrowing demands a cast like forcing a large object into a small box.
1Z0-811 Primitives, Strings and Operators Practice Question
This 1Z0-811 practice question tests your understanding of primitives, strings and operators. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 of the following statements about primitive type conversion are true?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implicit widening conversion is allowed from int to long.
A is true: int to long is widening. B is true: narrowing double to int requires explicit cast. C is false: boolean cannot be cast to numeric types. D is true: char to int is widening. E is false: float to long requires explicit cast.
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 float can be implicitly converted to long.
Why it's wrong here
Requires explicit cast due to possible precision loss.
✓
Implicit widening conversion is allowed from int to long.
Why this is correct
int to long is a widening primitive conversion.
Related concept
Read the scenario before looking for a memorised answer.
✗
A boolean can be converted to int using casting.
Why it's wrong here
boolean is not compatible with numeric types.
✓
A char can be assigned to an int without cast because char is unsigned 16-bit and int is 32-bit.
Why this is correct
char to int is widening.
Related concept
Read the scenario before looking for a memorised answer.
✓
Narrowing conversion from double to int requires an explicit cast.
Why this is correct
Narrowing always requires explicit cast.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 1Z0-811 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Primitives, Strings and Operators — This question tests Primitives, Strings and Operators — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implicit widening conversion is allowed from int to long. — A is true: int to long is widening. B is true: narrowing double to int requires explicit cast. C is false: boolean cannot be cast to numeric types. D is true: char to int is widening. E is false: float to long requires explicit cast.
What should I do if I get this 1Z0-811 question wrong?
Identify which 1Z0-811 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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