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• Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
• Understand variable scopes, apply encapsulation and make objects immutable
• Define and use fields and methods, including instance, static and overloaded methods
• Develop code that mitigates security threats such as denial of service, code injection, input validation and ensure data integrity
• Initialize objects and their members using instance and static initialiser statements and constructors
• Secure resource access including filesystems, manage policies and execute privileged code
• Declare and instantiate Java objects including nested class objects, and explain objects' - lifecycles (including creation, dereferencing by reassignment, and garbage collection)
• Utilize polymorphism and casting to call methods, differentiate object type versus reference type
• Create and use subclasses and superclasses, including abstract classes
• Create and use enumerations

Reference: https://education.oracle.com/java-se-11-developer/pexam_1Z0-819?intcmp=WWOUBLOGPOSTLADJAVA082913

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