Java SE 8 Programmer Certification Exam Practice Tests 2021

Java SE 8 Programmer Certification Exam Practice Tests 2021, Java Certification – Oracle Certified Associate/Professional OCA/OCP Exam 1Z0-808/1Z0-809 – [+420 Questions].

That’s because Oracle’s Java certification program, unlike many other certifications out there, has real value in the industry. One of the main reasons is that it’s an official Oracle certification, but second, the exam is quite difficult to pass.

This course is intended for those who want become a Java 8 Oracle Certified Associate/Professional (OCA/OCP) by taking the 1Z0‐808 Exam as well as those who want to test their knowledge of Java 8.

It is more important than ever to use practice exams before appearing for 1Z0-808/1Z0-809 exam because this exam covers a wide range of topics. They range from basic, such as variable decarations, classes, loops, conditionals, overloading, and overriding) to really advanced. That’s a lot of topics to study! It is not easy to remember all the information just by reading a book. You must train your mind to retain important information so that you can answer the questions in the exam. Practicing with these exams will ensure that you will not skip over critical information.

This certification is the representation of attaining a certain skillset and expertise that is backed by Oracle. It validates your achievement and helps to showcase it with your professional network. Get Certified today.

These are practice exams for the Java SE 8 Programmer Exam 1Z0-808/1Z0-809. they comprises brand-new questions, which are similar to the questions that can be expected on the real exam. Working through these exams will give you a good indication of how well you are prepared for the real exam, and whether any topics need further study.

Java programmer certifications are designed to tell would-be employers whether you really know your stuff, and cracking the OCA/OCP Java SE 8 Programmer Certification is not an easy task. if you want to pass the exam the first time with a score that you can be proud of. You need to take this course, that will help you to understand the certification process so that you’re ready for the challenging questions you’ll face in 1Z0-808/1Z0-809 the exam. This course provide detailed explanations, including why options are correct or incorrect. Mark your incorrect answers and identify the sections that you need to reread.

So if you don’t hold any previous Java certifications, then you should take the 1Z0‐808/1Z0-809 Java SE 8 Programmer Exam. It is a very broad exam, covering subjects from basic Java concepts and syntax to more advanced topics. Some libraries you may use every day, while others you may not be familiar with in your career.

This Udemy course contains 300+ unique and high-quality practice questions to prepare for Java 8 Certification (1Z0-808/1Z0-809). Java certification is a very in-demand certification and also a great way to improve your Java skills. We have divided these 300+ questions into 6 full-length practice tests to mimic the real exam. You will get 150 minutes to answer the questions. The passing score is 65%, the same as the actual Java 8 certification exam.

Once you have gone through the test you can also check the detailed explanation to understand the topic in depth. It’s imperative for you to have good knowledge of exam topics and explanations will help you with that.

If you have any doubt, ask in the QnA section and we’ll try to answer those questions. All the best for your Java 8 certification exam.

*** Review OCA exam topics: ***

Java Basics

• Define the scope of variables
• Define the structure of a Java class
• Create executable Java applications with a main method; run a Java program from the command line; produce console output
• Import other Java packages to make them accessible in your code
• Compare and contrast the features and components of Java such as: platform independence, object orientation, encapsulation, etc.

Working With Java Data Types

• Declare and initialize variables (including casting of primitive data types)
• Differentiate between object reference variables and primitive variables
• Know how to read or write to object fields
• Explain an Object’s Lifecycle (creation, “dereference by reassignment” and garbage collection)
• Develop code that uses wrapper classes such as Boolean, Double, and Integer

Using Operators and Decision Constructs

• Use Java operators; use parentheses to override operator precedence
• Test equality between Strings and other objects using == and equals ()
• Create if and if/else and ternary constructs
• Use a switch statement

Creating and Using Arrays

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

Using Loop Constructs

• Create and use while loops
• Create and use for loops including the enhanced for loop
• Create and use do/while loops
• Compare loop constructs
• Use break and continue

Working with Methods and Encapsulation

• Create methods with arguments and return values; including overloaded methods
• Apply the static keyword to methods and fields
• Create and overload constructors; differentiate between default and user defined constructors
• Apply access modifiers
• Apply encapsulation principles to a class
• Determine the effect upon object references and primitive values when they are passed into methods that change the values

Working with Inheritance

• Describe inheritance and its benefits
• Develop code that makes use of polymorphism; develop code that overrides methods; differentiate between the type of a reference and the type of an object
• Determine when casting is necessary
• Use super and this to access objects and constructors
• Use abstract classes and interfaces

Handling Exceptions

• Differentiate among checked exceptions, unchecked exceptions, and Errors
• Create a try-catch block and determine how exceptions alter normal program flow
• Describe the advantages of Exception handling
• Create and invoke a method that throws an exception
• Recognize common exception classes (such as NullPointerException, ArithmeticException, ArrayIndexOutOfBoundsException, ClassCastException)

Working with Selected classes from the Java API

• Manipulate data using the StringBuilder class and its methods
• Create and manipulate Strings
• Create and manipulate calendar data using classes from java.time.LocalDateTime, java.time.LocalDate, java.time.LocalTime, java.time.format.DateTimeFormatter, java.time.Period
• Declare and use an ArrayList of a given type
• Write a simple Lambda expression that consumes a Lambda Predicate expression

*** Review OCP exam topics: ***

Java Class Design

• Implement encapsulation
• Implement inheritance including visibility modifiers and composition
• Implement polymorphism
• Override hashCode, equals, and toString methods from Object class
• Create and use singleton classes and immutable classes
• Develop code that uses static keyword on initialize blocks, variables, methods, and classes

Advanced Java Class Design

• Develop code that uses abstract classes and methods
• Develop code that uses the final keyword
• Create inner classes including static inner class, local class, nested class, and anonymous inner class
• Use enumerated types including methods, and constructors in an enum type
• Develop code that declares, implements and/or extends interfaces and use the @Override annotation.
• Create and use Lambda expressions

Generics and Collections

• Create and use a generic class
• Create and use ArrayList, TreeSet, TreeMap, and ArrayDeque objects
• Use java.util.Comparator and java.lang.Comparable interfaces
• Collections Streams and Filters
• Iterate using forEach methods of Streams and List
• Describe Stream interface and Stream pipeline
• Filter a collection by using lambda expressions
• Use method references with Streams

Lambda Built-in Functional Interfaces

• Use the built-in interfaces included in the java.util.function package such as Predicate, Consumer, Function, and Supplier
• Develop code that uses primitive versions of functional interfaces
• Develop code that uses binary versions of functional interfaces
• Develop code that uses the UnaryOperator interface

Java Stream API

• Develop code to extract data from an object using peek() and map() methods including primitive versions of the map() method
• Search for data by using search methods of the Stream classes including findFirst, findAny, anyMatch, allMatch, noneMatch
• Develop code that uses the Optional class
• Develop code that uses Stream data methods and calculation methods
• Sort a collection using Stream API
• Save results to a collection using the collect method and group/partition data using the Collectors class
• Use flatMap() methods in the Stream API

Exceptions and Assertions

• Use try-catch and throw statements
• Use catch, multi-catch, and finally clauses
• Use Autoclose resources with a try-with-resources statement
• Create custom exceptions and Auto-closeable resources
• Test invariants by using assertions

Use Java SE 8 Date/Time API

• Create and manage date-based and time-based events including a combination of date and time into a single object using LocalDate, LocalTime, LocalDateTime, Instant, Period, and Duration
• Work with dates and times across timezones and manage changes resulting from daylight savings including Format date and times values
• Define and create and manage date-based and time-based events using Instant, Period, Duration, and TemporalUnit

Java I/O Fundamentals

• Read and write data from the console
• Use BufferedReader, BufferedWriter, File, FileReader, FileWriter, FileInputStream, FileOutputStream, ObjectOutputStream, ObjectInputStream, and PrintWriter in the java io package.

Java File I/O (NIO.2)

• Use Path interface to operate on file and directory paths
• Use Files class to check, read, delete, copy, move, manage metadata of a file or directory
• Use Stream API with NIO.2

Java Concurrency

• Create worker threads using Runnable, Callable and use an ExecutorService to concurrently execute tasks
• Identify potential threading problems among deadlock, starvation, livelock, and race conditions
• Use synchronized keyword and java.util.concurrent.atomic package to control the order of thread execution
• Use java.util.concurrent collections and classes including CyclicBarrier and CopyOnWriteArrayList
• Use parallel Fork/Join Framework
• Use parallel Streams including reduction, decomposition, merging processes, pipelines and performance.

Building Database Applications with JDBC

• Describe the interfaces that make up the core of the JDBC API including the Driver, Connection, Statement, and ResultSet interfaces and their relationship to provider implementations
• Identify the components required to connect to a database using the DriverManager class including the JDBC URL
• Submit queries and read results from the database including creating statements, returning result sets, iterating through the results, and properly closing result sets, statements, and connections

Localization

• Read and set the locale by using the Locale object
• Create and read a Properties file
• Build a resource bundle for each locale and load a resource bundle in an application

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