Java SE 11 Developer Oracle Certified Professional ...

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Oracle Certified Professional:Java SE 11 Developer

Orlando JUG - June 21, 2019

Jim ClarkeMaster Solutions ConsultantJava World-wide Sales

Oracle Confidential – Internal/Restricted/Highly Restricted

Copyright © 2019, Oracle and/or its affiliates. All rights reserved.

Get Java Developer Market Ready Skills71% of individuals believe certification was a key factor in recent raise -

January 2019 issue of Certification Magazine’s annual salary survey. • Train and Certify:

– With the Core Java Learning Subscription• Gain access to the core Java SE 11 training materials and receive one free attempt for each certification exam

included in the Java SE Programmer 2019 learning paths. Oracle Learning Subscriptions offer the biggest value in training and certification savings.

– Or Plan Your Own Path• Take this training:

– Java SE: Programming I– Java SE: Programming II

• Take these exams:– Java SE: Programmer I (1Z0-815)– Java SE: Programmer II (1Z0-816)

2

https://education.oracle.com/java-se-programming-i-ed-2/courP_10211

https://education.oracle.com/java-se-programming-ii/courP_10212

https://education.oracle.com/products/pexam_1Z0-815

https://education.oracle.com/products/pexam_1Z0-816


Your Path to Java SE 11 Developer OCP Certification

3

Download the Java Certification Guide here(link to https://www.oracle.com/a/ocom/docs/dc/ww-java-cert-guide-java-se11.pdf)


Certification DetailsJava SE 11 Programmer I & Java SE 11 Programmer II• Credential Awarded: Oracle Certified Professional Java SE 11 Developer • Exam Number: 1Z0-815 & 1Z0-816 • Target Audience: Java Developers • Platform: Delivered via Pearson VUE • Exam Duration: 180 minutes • Number of Questions: 80 • Passing Score: 63% • Digital Badge: 2019 Oracle Certified Professional Java SE 11 Developer

Oracle Confidential – Internal/Restricted/Highly Restricted 4


Suggested PrerequisitesJava SE 11 Programmer I & Java SE 11 Programmer II• You should have:

– Minimum of 12 to18 months of experience with Java. – Knowledge of general programming concepts and techniques. – Experience with any programming language.

• You would benefit in having experience in: – Writing programs in Java. – Use of Java IDE. – Package and deploy Java apps.

• Attend Recommended Oracle Training: – The Java SE Programming I and Java SE Programming II courses are currently available,

and are terrific tools to help you prepare not only for your exam, but for your job as a Java Developer.



• Java 11 Upgrade Learning Subscription – what you need to upgrade to Java SE 11 from Java SE 8.– Receive one free attempt at the Upgrade OCP Java 6, 7 & 8 to Java SE 11

Developer exam. • Java SE 8 OCPs should take this learning subscription.

• If you are certified on Java SE 6 or Java SE 7, you should choose the Core Learning Subscription or Java Programming Learning Subscription.

• Core Java Learning Subscription – what you need to learn the Java language (JDK 11).– Includes Java SE Programmer 2019 Upgrade, Java SE Programmer 2019

Beginner and Java SE Programmer 2019 Professional Learning Paths.

– Receive one free attempt at each of the certification exams aligned to the three learning paths.

• Java Programming Learning Subscription – what you need to become proficient in both core and enterprise Java development.– Contains all the training materials you need for the Java 11 Upgrade, Core Java,

Java SE 8 and the Enterprise Developer Learning Paths.

– Receive one free attempt at each of the certification exams aligned to all learning paths.

Java Learning Subscriptions – Training + Certification


Oracle certification exam+


Exam: Java SE 11 Programmer I IZ0-815Exam Prep: Java SE Programming I Ed 2• Focused on fundamental Java topics that lay at the foundation for a Java

Developer role.• Entry-level course

– aimed at programmers who are new to Java and who need to learn its concepts, language constructs, and data types.

– Included are topics on exception handling, lambda expressions, and modular programming.

• Designed for latest JDK 11.



Exam: Java SE 11 Programmer I IZ0-815Exam Prep: Java SE Programming I Ed 2

Objectives• Write Java code that uses variables, arrays, conditional and loop constructs

of achieve program objectives• Identify modular programming principles• Access and create static fields and methods• Encapsulate a class using access modifiers and overloaded constructors• Manipulate numeric, text, and string data using appropriate Java operators• Set environment variables to allow the Java compiler and runtime

executables to function properly




Objectives (cont.)• Create simple Java classes and use object references to access fields and

methods in a class• Demonstrate polymorphism by implementing a Java interface• Handle a checked exception in a Java application• Use a Predicate Lambda expression as the argument to a method• Define and implement a simple class hierarchy that supports application

requirements



Exam Prep: Java SE Programming I Ed 2

Creating a Simple Java Program

• Create an executable Java program with a main class

• Compile and run a Java program from the command line

• Create and import packages

Understanding Java Technology and environment

• Describe Java Technology and the Java development environment

• Identify key features of the Java language

Working With Java Primitive Data Types and String APIs

• Declare and initialize variables (including casting and promoting primitive data types)

• Identify the scope of variable • Use local variable type inference • Create and manipulate Strings • Manipulate data using the StringBuilder class

and its methods

Using Operators and Decision Constructs

• Use Java operators including the use of parenthesis to override operator precedence

• Use Java control statements including if, else, and switch

• Create and use do/while, while, for and for each loops, including nested loops, use break and continue statements


Exam Prep: Java SE Programming I Ed 2Describing and Using Objects and

Classes

• Declare and instantiate Java objects, and explain objects’ lifecycles (including creation, dereferencing by reassignment, and garbage collection)

• Define the structure of a Java class • Read or write to object fields

Working with Java Arrays

• Declare, instantiate, initialize and use a one-dimensional array

• Declare, instantiate, initialize and use two-dimensional array

Creating and Using Methods

• Create methods and constructors with arguments and return values

• Create and invoke overloaded methods• Apply the static keyword to methods and

fields

Applying Encapsulation

• Apply access modifiers• Apply encapsulation principles to a class


Exam Prep: Java SE Programming I Ed 2Programming Abstractly Through

Interfaces

• Create and implement interfaces • Distinguish class inheritance from interface • inheritance including abstract classes • Declare and use List and ArrayList instances • Understanding lambda Expressions

Reusing Implementations Through Inheritance

• Create and use subclasses and superclasses• Create and extend abstract classes • Enable polymorphism by overriding methods • Utilize polymorphism to cast and call methods,

differentiating object type versus reference type

• Distinguish overloading, overriding, and hiding

Handling Exception

• Describe the advantages of Exception handling and differentiate among checked, unchecked exceptions, and Errors

• Create try-catch blocks and determine how exceptions alter program flow

• Create and invoke a method that throws an exception

Understanding Modules

• Describe the Modular JDK • Declare modules and enable access between • modules • Describe how a modular project is compiled • and run


Exam: Java SE 11 Programmer II IZ0-816Exam Prep: Java SE Programming II• Second-level course for programmers learning the Java language.

– It rounds-out the topics that were taught in the previous course, Java SE: Programming I, and provides additional key skills for Java programmers, such as secure coding, modular programming, and database access.

• This course uses today's main Java version for its practices (currently Java 11).




Objectives (cont.)• Create simple Java classes and use object references to access fields and

methods in a class• Demonstrate polymorphism by implementing a Java interface• Handle a checked exception in a Java application• Use a Predicate Lambda expression as the argument to a method• Define and implement a simple class hierarchy that supports application

requirements



Exam Prep: Java SE Programming II

Exception Handling and Assertions

• Use try-with-resources constructCreate and use custom exception classes

• Test invariants by using assertions

Java Fundamentals

• Create and use final classesCreate and use inner, nested and

• anonymous classesCreate and use enumerations

Java Interfaces

• Create and use interfaces with default methods

• Create and use interfaces with private methods


Exam Prep: Java SE Programming IIFunctional Interface and Lambda

Expressions

• Define and write functional interfaces• Create and use lambda expressions

including statement lambdas, local-variable for lambda parameters

Built-in Functional Interfaces

• Use interfaces from java.util.function package • Use core functional interfaces including

Predicate, Consumer, Function and Supplier • Use primitive and binary variations of base

interfaces of java.util.function package

Lambda Operations on Stream

• Extract stream data using map, peek and flatMap methods

• Search stream data using search findFirst, findAny, anyMatch, allMatch and noneMatchmethods

• Use Optional class • Perform calculations using count, max, min, • average and sum stream operations • Sort a collection using lambda expressions • Use Collectors with stream, including the • groupingBy and partitioningBy operation



Migration to a Modular Application

• Migrate the application developed using a Java version prior to SE 9 to SE 11 including top-down and bottom-up migration, splitting a Java SE 8 application into modules for migration

• Run a modularized application on classpathand on modulepath

• Use jdeps to determine dependencies and identify way to address the cyclic dependencies

Concurrency

• Create worker threads using Runnable, Callable and use an ExecutorService to concurrently execute tasks

• Use java util concurrent collections and classes including CyclicBarrier and CopyOnWriteArrayList

• Write thread-safe code • Identify threading problems such as deadlocks • and livelocks



Secure Coding in Java SE Application

• Preventing Denial of Service in Java applications

• Securing confidential information in Java application

• Implementing Data integrity guidelines-injections

• and inclusion and input validation • Preventing external attack of the code by

limiting • Accessibility and Extensibility, properly

handling • input validation, and mutability • Securing constructing sensitive objects • Securing Serialization and Deserialization

I/O (Fundamentals and NIO2)

• Read data from and write console and file data using I/O stream

• Use I/O Stream to read and write files • Read and write objects by using serialization • Use Path interface to operate on file • and directory paths • Use Files class to check, delete, copy or

move a • file or directory • Use Stream API with Files



Annotations

• Describe the purpose of annotations and typical usage patterns

• Apply annotations to classes and methods• Describe commonly used annotations in the

JDK • Declare custom annotations

Localization

• Use Locale class• Use resource bundles• Format messages, dates, and numbers with

Java

Database Applications with JDBC

• Connect to databases using JDBC URLs and DriverManager

• Use PreparedStatement to perform CRUD operations • Use PreparedStatement and CallableStatement

• APIs to perform database operations

Java Stream API

• Describe the Stream interface and pipelines• Use lambda expressions and method

references



Services in a Modular Application

• Describe the components of Services including directives

• Design a service type, load services using ServiceLoader, check for dependencies of the services including consumer and provider modules

Parallel Stream

• Develop the code that use parallel stream • Implement decomposition and reduction

• with stream

Generics and Collections

• Use wrapper classes, auto-boxing and auto-unboxing

• Create and use generic classes,methods with diamond notation and wildcards

• Describe Collections Framework and use key collection interfaces

• Use Comparator and Comparable interfaces • Create and use convenience methods • for collections


Exam Prep: Sample Question #1 Given the code fragment: Stream<Integer> numStream = Stream.of(10, 20, 30); numStream.map(n -> n + 10).peek(s -> System.out.print(s)); numStream.forEach(s -> System.out.println(s));

What it the result? A. 203040 102030 B. 102030 203040 C. 102030 102030 D. An exception is thrown at runtime.


Exam Prep: Sample Question #2 Given the code fragment: d

10. var lst = List.of(1, 2, 3, 4);11. lst.replaceAll(x -> x + 100);12. System.out.println(“-Completed-”);

Which action enables to print -Completed-?

A. Replacing line 10, with List<Integer> lst = List.of(1,2,3,4); B. Replacing line 11, with lst.replaceAll(x = x + 100);C. Replacing line 10, with var lst = Arrays.asList(1, 2, 3, 4); D. Replacing line 11, with lst.forEach(x -> x + 100);


Exam Prep: Sample Question #3 Which two are guidelines for preventing denial of service attacks?

A. Release resources in all cases. B. Resource limit checks should not suffer from numeric overflow. C. Purge sensitive information from exceptions. D. Validate file formats before processing untrusted files. E. Make public static fields final. F. Use mutable classes whenever possible.


Exam Prep: Sample Question #4 Given: public class Client {

static void doCalc(byte... a) { System.out.print("byte...");

}static void doCalc(long a, long b) {

System.out.print("long, long");} static void doCalc(Byte s1, Byte s2) {

System.out.print("Byte, Byte"); }public static void main (String[] args) {

byte b = 5; doCalc(b, b);

} }A. byte...B. long, long C. Byte, Byte D. compilation error


Upgrade OCP Java 6, 7 & 8 to Java SE 11 Developer |1Z0-817


• Upgrade exam– Candidates who hold the Oracle Certified Professional, Java SE 6, 7, or 8 Programmer

• This exam focuses on the most important of the newest features of Java. • I am Java SE 8 OCP – Training Path

– Java SE: Exploiting Modularity and Other New Features– Java 11: New Features (free video)

• I am Java SE 7 OCP OCP – Training Path – Java SE 11 Programming II– Java SE 11 New Features webinar– Plus Java SE 8 OCP Training Path


Exam Prep: Upgrade OCP Java 6, 7 & 8 toJava SE 11 Developer

Understanding Modules

• Create and use subclasses and superclasses• Create and extend abstract classes • Enable polymorphism by overriding methods • Utilize polymorphism to cast and call methods,

differentiating object type versus reference type

• Distinguish overloading, overriding, and hiding

Services in a Modular Application

• Describe the components of Services including directives

• Design a service type, load services using ServiceLoader, check for dependencies of the services including consumer and provider modules

Migration to a Modular Application

• Migrate the application developed using a Java version prior to SE 9 to SE 11 including top-down and bottom-up migration, splitting a Java SE 8 application into modules for migration

• Run a modularized application on classpathand on modulepath

• Use jdeps to determine dependencies and identify way to address the cyclic dependencies



Local-Variable Type Inference

• Use local-variable type inference• Create and use lambda expressions with

local-variable type inferred parameters

Lambda Operations on Stream

• Extract stream data using map, peek and flatMap methods

• Search stream data using search findFirst, findAny, anyMatch, allMatch and noneMatchmethods

• Use Optional class • Perform calculations using count, max, min, • average and sum stream operations • Sort a collection using lambda expressions • Use Collectors with stream, including the

groupingBy and partitioningBy operation

Java Interfaces

• Describe the advantages of Exception handling and differentiate among checked, unchecked exceptions, and Errors

• Create try-catch blocks and determine how exceptions alter program flow

• Create and invoke a method that throws an exception



Java Interfaces

• Create and use methods in interfaces• Define and write functional interfaces

Lambda Expressions

• Create and use lambda expressions• Use lambda expressions and method

references• Use built-in functional interfaces including

Predicate, Consumer, Function, and Supplier• Use primitive and binary variations of base

interfaces of java.util.function package

Parallel Streams

• Develop the code that use parallel streams• Implement decomposition and reduction with

streams

Language Enhancements

• Use try-with-resources construct• Develop code that handles multiple

Exception types in a single catch block



Java File I/O (NIO.2)

• Use Path interface to operate on file and directory paths

• Use Files class to check, delete, copy or move a file or directory

• Use Stream API with Files


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For more information:• Java SE 11 Oracle Training and Certification

– https://www.oracle.com/a/ocom/docs/dc/ww-java-cert-guide-java-se11.pdf

• Java SE 11 Certification Questions Answered– https://www.oracle.com/a/ocom/docs/dc/ou-5021-java-se11-faq-

4.pdf?intcmp=WWOUCERTBLOGECIHA032019


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