Java Certification (1Z0-819) Topic-wise Tests Part-2 [2025]

It seems you've outlined a comprehensive study plan for the Java Certification (1Z0-819) exam, broken down into multiple simulated tests that cover various topics of the Java Standard Edition (SE) platform. Each test is designed to help candidates understand the types of questions they might encounter in the actual exam, with an emphasis on real-world application and practical knowledge.

Here's a summary of what each test in your plan covers:

1. Test 1 - Working with Lambda expressions

   • Use local variable type inference as lambda parameters (not covered in Part-1)
   • Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package

2. Test 2 - Working with Streams

   • Use Java Streams to filter, transform, and process data
   • Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams

3. Test 3 - Java Platform Module System

   • Deploy and execute modular applications, including automatic modules
   • Declare, use, and expose modules, including the use of services

4. Test 4 - Concurrency

   • Create worker threads using Runnable and Callable, manage concurrency using an ExecutorService and the java.util.concurrent API
   • Develop thread-safe code using different locking mechanisms and the java.util.concurrent API
   • Database applications with JDBC
   • Connect to and perform database SQL operations, process query results using the JDBC API

5. Test 5 - Java I/O API

   • Read and write console and file data using I/O Streams
   • Implement serialization and deserialization techniques on Java objects
   • Handle file system objects using the java.nio.file API

6. Test 6 - Localization, Annotations, and Secure Coding in Java SE Application

   • Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers
   • Create, apply, and process annotations
   • Develop code that mitigates security threats such as denial of service, code injection, input validation, and ensure data integrity
   • Secure resource access including filesystems, manage policies, and execute privileged code

The course structure is designed to provide a comprehensive review of the Java SE 17 topics required for the 1Z0-819 exam. It emphasizes practical application and includes detailed explanations after each question to aid in understanding the concepts, which is crucial for passing the certification exam. Additionally, you're encouraged to take these tests multiple times to reinforce your learning and ensure a deep understanding of the material.

Remember to manage your time effectively, stay relaxed, and approach each question with confidence. Good luck with your studies and your certification exam!