Oracle 1Z0-819 Java SE 11 Dev Practice Exam
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Oracle 1Z0-819 Java SE 11 Developer
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Start NowAbout the Oracle 1Z0-819 Java SE 11 Dev Certification
The Oracle 1Z0-819 Java SE 11 Dev certification is designed for professionals who develop Java SE 11 applications using OOP principles, streams, and exception handling. As technology evolves and industry demands grow more complex; this credential validates your ability to apply real-world skills and knowledge using Oracle tools and frameworks. Earning the certification positions you as a trusted expert, capable of solving high-impact challenges and contributing to secure, scalable, and efficient systems.
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Test Your Knowledge of Oracle 1Z0-819 Java SE 11 Dev
Question #1
A developer wants to encapsulate fields in a class.
Which concept supports this?
A) Encapsulation
B) Abstraction
C) Inheritance
D) Polymorphism
Solution
Correct answers: A – Explanation:
Encapsulation hides internal state and exposes behavior via methods. Others are related but not directly about field protection.
Question #2
An implementer needs to handle multiple method signatures with the same name.
Which concept supports this?
A) Method Overloading
B) Method Overriding
C) Polymorphism
D) Interface Implementation
Solution
Correct answers: A – Explanation:
Method Overloading allows multiple signatures. Others are related but not the same mechanism.
Question #3
A user wants to ensure a subclass modifies a superclass method.
Which concept supports this?
A) Method Overriding
B) Inheritance
C) Polymorphism
D) Abstract Method
Solution
Correct answers: A – Explanation:
Method Overriding replaces superclass behavior. Others are related but not the direct mechanism.
Question #4
A manager wants to restrict class instantiation.
Which configuration supports this?
A) Private Constructor
B) Final Class
C) Static Block
D) Access Modifier
Solution
Correct answers: A – Explanation:
Private Constructor prevents external instantiation. Others are related but not definitive.
Question #5
An implementer needs to define a contract without implementation.
Which feature supports this?
A) Interface
B) Abstract Class
C) Functional Interface
D) Lambda Expression
Solution
Correct answers: A – Explanation:
Interface defines method signatures only. Others may include partial implementation.
Question #6
A user wants to handle exceptions during runtime.
Which construct supports this?
A) try-catch
B) throws
C) finally
D) assert
Solution
Correct answers: A – Explanation:
try-catch handles exceptions directly. Others are related but not the primary handler.
Question #7
An architect needs to manage memory manually.
Which tool supports this?
A) Garbage Collector
B) Memory Manager
C) Heap Monitor
D) Polymorphism
Solution
Correct answers: A – Explanation:
Garbage Collector reclaims unused memory. Others are informal or not standard Java tools.
Question #8
An implementer wants to use lambda expressions.
Which feature supports this?
A) Functional Interface
B) Anonymous Class
C) Method Reference
D) Stream API
Solution
Correct answers: A – Explanation:
Encapsulation hides internal state and exposes behavior via methods. Others are related but not directly about field protection.
Question #9
A user wants to process collections efficiently.
Which tool supports this?
A) Stream API
B) Collection Framework
C) Iterator
D) List Processor
Solution
Correct answers: A – Explanation:
Stream API supports functional-style operations. Others are foundational but less efficient for bulk processing.
Question #10
A manager wants to audit code quality.
Which report provides this?
A) Static Analysis Report
B) Code Metrics
C) Quality Summary
D) Audit Log
Solution
Correct answers: A – Explanation:
Static Analysis Report identifies issues and patterns. Others are informal or not standard Java reports.
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