1Z0-829 Utilizing Java Object-Oriented Approach Practice Question
Which two statements are true about records in Java? (Choose two.)
⚠ Common exam trap
Watch out — candidates often confuse records with regular classes and assume they can be abstract, extend other classes, or add extra instance fields, but the Java language explicitly restricts records to be final, to extend only java.lang.Record, and to have all instance fields derived from the component list.
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
✓
Records provide a canonical constructor that initializes all components.
A record in Java implicitly provides a canonical constructor that accepts all the components declared in the record header and initializes them. This constructor is generated by the compiler unless a custom canonical constructor is explicitly defined, ensuring that all component fields are set upon instantiation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Records provide a canonical constructor that initializes all components.
Why this is correct
The canonical constructor initializes all record components.
- ✗
Records can be abstract.
Why it's wrong here
Records are final and cannot be abstract.
- ✗
Records can extend other classes.
Why it's wrong here
Records implicitly extend java.lang.Record and cannot extend other classes.
- ✗
Records can have instance fields that are not part of the record component list.
Why it's wrong here
All instance fields must be declared as components; additional instance fields are not allowed.
- ✓
Records are implicitly final.
Why this is correct
Records are implicitly final; they cannot be extended.
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