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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 module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI
module?
Correct Answer:
A
Question #2
Question #3
Question #4
Given:
What needs to change to make these classes compile and still handle all types of Interface Worker?
Correct Answer:
D
Question #5
Why would you choose to use a peek operation instead of a forEach operation on a Stream?
Correct Answer:
C
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