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Oracle 1Z0-819 Exam
Java SE 11 Developer
Last Updated: Jul 3, 2024
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260 Questions and Answers for the Oracle 1Z0-819 exam
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Oracle Java SE 11 Developer Syllabus
- Define and use fields and methods, including instance, static and overloaded methods/ Working with Arrays and Collections
- Create and use subclasses and superclasses, including abstract classes/ Use local variable type inference, including as lambda parameters
- Understand variable scopes, apply encapsulation and make objects immutable/ Connect to and perform database SQL operations, process query results using JDBC API
- Handle text using String and StringBuilder classes/ Utilize polymorphism and casting to call methods, differentiate object type versus reference type
- Implement serialization and deserialization techniques on Java objects/ Declare and instantiate Java objects including nested class objects
- Create and use interfaces, identify functional interfaces/ Initialize objects and their members using instance and static initialiser statements and constructors
- Deploy and execute modular applications, including automatic modules/ Implement functional interfaces using lambda expressions
- Develop code that mitigates security threats such as denial of service/ Use Java Streams to filter, transform and process data
- Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting/ Sort collections and arrays using Comparator and Comparable interfaces
- Secure resource access including filesystems, manage policies and execute privileged code/ Develop thread-safe code, using different locking mechanisms