OCP Java SE 11 Developer 1Z0-819 Practice Exams

1Z0-819 Java SE 11 Developer Practice Exams with complete explanations!

Become a Java Pro! I created this practice exam based on my personal experience taking the exam. There are only 100 questions here, but after you have passed them all, carefully read all the explanations, you can safely go to the exam and pass it successfully. There are no questions of the same type in these practice tests, as you need to understand the concepts presented here in order to successfully pass the exam.

Real Exam info:

• Exam number and titler: 1Z0-819: Java SE 11 Developer

• Exam Price: $245

• Format: Multiple Choice

• Number of Questions: 50

• Duration: 90 minutes

• Passing score: 68%

Practice Exam info:

• Real exam experience

• Questions with a complete explanation

• Format: Multiple Choice

• Number of Questions: 2 practice tests, 50 questions each

• Duration: 90 minutes

• Passing score: 68%

  
  

This practice exam covers all topics covered in the Java SE 11 Developer exam:

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 lambda parameters

Controlling Program Flow

• Create and use loops, if/else, and switch statements

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 initializer 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

Exception Handling

• Handle exceptions using try/catch/finally clauses, try-with-resource, and multi-catch statements

• Create and use custom exceptions

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

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

Java Platform Module System

• Deploy and execute modular applications, including automatic modules

• Declare, use, and expose modules, including the use of services

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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

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

  
  

Secure Coding in Java SE Application

• Develop code that mitigates security threats such as denial of service, code injection, input validation and ensures data integrity

• Secure resource access including filesystems, manage policies and execute privileged code

Database Applications with JDBC

• Connect to and perform database SQL operations, process query results using JDBC API

Localization

• Implement Localization using Locale, resource bundles, and Java APIs to parse and format messages, dates, and numbers

Annotations

• Create, apply, and process annotations