Free Java - 1Z0819 Certification Preparation Set
Large companies have large codebases, and it takes them a long time to upgrade that code to new versions of Java - for years Java 8 was the main version used by companies, and with the release of Java 11, and Oracle's commitment to supporting it for many years as well as them designating it as the long term support version, this means that the majority of the industry will be moving, or already have moved to Java 11. Particularly now that Java 8 support is ending soon.
Oracle does not have a certification program for Java 9, 10, 12, or Java 13, etc. This is by design. Because Java 11 is Oracle's long term supported version of Java. For this reason, Java 11 is the version of Java you need to become certified in. And this course will help you achieve that.
| Format : Multiple Choice | Number of Questions : 50 |
| Duration : 90 Minutes | Passing Score : 68% |
Exam objectives for 1Z0-819
Working with Java data types
- Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
- Handle text using String and StringBuilder classes
- Use local variable type inference, including as lambda parameters
Java Object-Oriented Approach
- Declare and instantiate Java objects including nested class objects, and explain objects' lifecycles (including creation, dereferencing by reassignment, and garbage collection)
- Define and use fields and methods, including instance, static and overloaded methods
- Initialize objects and their members using instance and static initialiser statements and constructors
- Understand variable scopes, apply encapsulation and make objects immutable
- Create and use subclasses and superclasses, including abstract classes
- Utilize polymorphism and casting to call methods, differentiate object type versus reference type
- Create and use interfaces, identify functional interfaces, and utilize private, static, and default methods
- Create and use enumerations
Working with Arrays and Collections
- Use generics, including wildcards
- Use a Java array and List, Set, Map and Deque collections, including convenience methods
- Sort collections and arrays using Comparator and Comparable interfaces
Java Platform Module System
- Deploy and execute modular applications, including automatic modules
- Declare, use, and expose modules, including the use of services
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 java.nio.file API
Database Applications with JDBC
- Connect to and perform database SQL operations, process query results using JDBC API
Annotations
- Create, apply, and process annotations
Controlling Program Flow
- Create and use loops, if/else, and switch statements
Exception Handling
- Handle exceptions using try/catch/finally clauses, try-with-resource, and multi-catch statements
- Create and use custom exceptions
Working with Streams and Lambda expressions
- Implement functional interfaces using lambda expressions, including interfaces from the java.util.function package
- Use Java Streams to filter, transform and process data
- Perform decomposition and reduction, including grouping and partitioning on sequential and parallel streams
Concurrency
- Create worker threads using Runnable and Callable, and manage concurrency using an ExecutorService and java.util.concurrent API
- Develop thread-safe code, using different locking mechanisms and java.util.concurrent API
Secure Coding in Java SE Application
- 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
Localization
- Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers