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• Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
• Use Java Streams to filter, transform and process data
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• Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams
• Sort collections and arrays using Comparator and Comparable interfaces
• Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
• Use a Java array and List, Set, Map and Deque collections, including convenience methods
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Reference: https://education.oracle.com/java-se-11-developer/pexam_1Z0-819?intcmp=WWOUBLOGPOSTLADJAVA082913

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• Understand variable scopes, apply encapsulation and make objects immutable
• Secure resource access including filesystems, manage policies and execute privileged code
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