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Oracle 1Z0-819 Exam

Certification Provider: Oracle
Exam Name: Java SE 11 Developer
Number of questions in our database: 260
Exam Version: May. 17, 2023
1Z0-819 Exam Official Topics:
  • Topic 1: Define and use fields and methods, including instance, static and overloaded methods/ Working with Arrays and Collections
  • Topic 2: Create and use subclasses and superclasses, including abstract classes/ Use local variable type inference, including as lambda parameters
  • Topic 3: Understand variable scopes, apply encapsulation and make objects immutable/ Connect to and perform database SQL operations, process query results using JDBC API
  • Topic 4: Handle text using String and StringBuilder classes/ Utilize polymorphism and casting to call methods, differentiate object type versus reference type
  • Topic 5: Implement serialization and deserialization techniques on Java objects/ Declare and instantiate Java objects including nested class objects
  • Topic 6: Create and use interfaces, identify functional interfaces/ Initialize objects and their members using instance and static initialiser statements and constructors
  • Topic 7: Deploy and execute modular applications, including automatic modules/ Implement functional interfaces using lambda expressions
  • Topic 8: Develop code that mitigates security threats such as denial of service/ Use Java Streams to filter, transform and process data
  • Topic 9: Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting/ Sort collections and arrays using Comparator and Comparable interfaces
  • Topic 10: Secure resource access including filesystems, manage policies and execute privileged code/ Develop thread-safe code, using different locking mechanisms

Free Oracle 1Z0-819 Exam Actual Questions

The questions for 1Z0-819 were last updated On May. 17, 2023

Question #1

Which is correct for a service provider for a print service defined in the PrintServiceAPI


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Correct Answer: A

Question #2


What is the result?

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Correct Answer: A

Question #3

Given the code fragment:

What is the result?

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Correct Answer: B

Question #4


What needs to change to make these classes compile and still handle all types of Interface Worker?

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Correct Answer: D

Question #5

Why would you choose to use a peek operation instead of a forEach operation on a Stream?

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Correct Answer: C

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