1Z0-829 Java Platform Overview and Packaging Practice Question
Exhibit
module com.example.app {
requires com.example.lib;
exports com.example.app.api;
opens com.example.app.internal to com.example.lib;
}Refer to the exhibit. Which statement is true about the com.example.app.internal package?
⚠ Common exam trap
Oracle often tests the distinction between `exports` (compile-time and runtime access to public types) and `opens` (runtime reflective access, including private members), and the trap here is that candidates confuse `opens` with `exports` or assume `opens` grants access to all modules unless a `to` clause is specified.
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
✓
It is accessible for deep reflection only by com.example.lib.
The exhibit shows that `com.example.app.internal` is declared with `opens com.example.app.internal to com.example.lib`. The `opens` directive grants deep reflection (access to private members) at runtime, but only to the specified module `com.example.lib`. Other modules cannot reflectively access this package unless they are explicitly listed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It is accessible for deep reflection only by com.example.lib.
Why this is correct
The opens ... to directive grants reflective access to the named module only.
- ✗
It is accessible for deep reflection by any module.
Why it's wrong here
Without 'to', it would be open to all; here it's restricted.
- ✗
It is not accessible for reflection at all.
Why it's wrong here
It is open for reflection to com.example.lib.
- ✗
It is exported to all modules.
Why it's wrong here
Only exports directive exports; opens does not export.
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