Oracle : 1z1-819 Questions & Answers
Last Updated: Aug 23, 2026
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Certification Path for Java SE 11 Developer Exam Number: 1Z0-819
Java SE 11 Developer Exam Number: 1Z0-819 is a fundamental exam. Successful completion by candidates will allow them to achieve Oracle Certified Professional: Java SE 11 Developer.
Reference: https://education.oracle.com/java-se-11-developer/pexam_1Z0-819?intcmp=WWOUBLOGPOSTLADJAVA082913
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Oracle 1z1-819 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| I/O (Fundamentals and NIO2) | 7% | - Use NIO2 API to work with file systems and file attributes - Read and write console and file input/output using Java I/O system - Use Stream API with files - Use Path interface to manipulate file paths |
| Java Platform Module System | 10% | - Migrate applications to use modules - Declare module dependencies - Use jdeps to determine dependencies - Deploy and execute modules - Explain the default modules and class path - Explain the concept of module exports and requires |
| Concurrency | 10% | - Use synchronized blocks and the volatile keyword - Use java.util.concurrent atomic classes and ForkJoinPool - Identify potential threading problems - Create worker threads using Runnable and Thread objects - Use ExecutorService to concurrently execute tasks - Use parallel streams to improve performance |
| Controlling Program Flow | 10% | - Use if and if/else statements - Use break and continue statements - Use switch statements - Use Java control statements - Use for, while, and do/while loops |
| Secure Coding in Java SE Application | 5% | - Secure sensitive data - Validate user input - Prevent SQL injection and other attacks - Prevent Denial of Service (DoS) attacks |
| Exception Handling and Localization | 10% | - Create and throw custom exceptions - Use assertions - Create try-catch blocks and understand exception propagation - Describe the advantages of exception handling - Use resource bundles and locale classes for internationalization - Use standard exception classes |
| Working with Java data types | 12% | - Declare and initialize variables - Read or write to object fields - Explain an object's lifecycle (creation, dereferencing via garbage collection) - Call methods on objects - Manipulate data using the StringBuilder class and its methods - Differentiate between object reference variables and primitive variables - Create and manipulate strings |
| Working with Arrays and Collections | 8% | - Filter a collection using lambda expressions - Use generic types and diamond operator - Sort elements in a collection - Iterate through a collection - Create a list, set, map, or queue collection - Search for elements in a collection |
| Working with Java OOP | 15% | - Apply the static keyword to methods and fields - Implement encapsulation - Implement polymorphism - Implement inheritance - Create inner classes and use them within other classes - Apply the final keyword to classes, methods, and fields - Use abstract classes and interfaces |
| Working with Streams and Lambda expressions | 13% | - Describe the Stream interface and pipeline - Filter a collection using lambda expressions - Use the Stream API to perform terminal operations - Perform decomposition using the reduce(), collect(), partition(), and groupingBy() methods - Use functional interfaces with lambda expressions - Use method references with streams |
| Annotations | 5% | - Describe the purpose of annotations - Apply standard annotations to classes and methods - Create custom annotations |
| Database Applications with JDBC | 5% | - Execute queries and process results - Describe the advantages of using a connection pool - Use parameterized queries - Connect to a database using JDBC |
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