Question 175 of 513
1Z0-829 Java I/O API and Securing Applications Practice Question
A class implements Serializable. Which modification ensures that a specific field (password) is not included in the serialized stream?
⚠ Common exam trap
Many candidates confuse `transient` with `volatile` or `static`, mistakenly thinking that `volatile` affects serialization or that `static` is the proper way to exclude a field, when in fact `static` fields are excluded by default but are not appropriate for instance-specific data like a password.
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
✓
Declare the field as transient
The `transient` modifier is the correct mechanism in Java to exclude a specific field from the default serialization process. When a class implements `Serializable`, all non-transient instance fields are serialized by default. Marking the `password` field as `transient` ensures it is skipped during serialization and restored as `null` (or default value) upon deserialization.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Declare the field as volatile
Why it's wrong here
volatile has no effect on serialization.
- ✓
Declare the field as transient
Why this is correct
Transient fields are skipped during serialization.
- ✗
Declare the field as static
Why it's wrong here
Static fields are not serialized, but this is a misuse if the field should be instance-specific.
- ✗
Declare the field as final
Why it's wrong here
final does not exclude from serialization.
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Last reviewed: Jul 4, 2026
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