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Description
Now is the time to get certified for Java!
Oracle Certification Associate Java OCA 1Z0-808.
There are six Practice Tests with preparation questions from all knowledge areas.
Every question has an explanation and a Try-It-Yourself-Code
which you can run to better understand the topic.
You can download the Try-It-Yourself-Code for all questions.
Exam Syllabus
Java Basics
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Define the scope of variables
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Define the structure of a Java class
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Create executable Java applications with a main method; run a Java program from the command line; produce console output
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Import other Java packages to make them accessible in your code
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Compare and contrast the features and components of Java such as: platform independence, object orientation, encapsulation, etc.
Working With Java Data Types
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Declare and initialize variables (including casting of primitive data types)
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Differentiate between object reference variables and primitive variables
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Know how to read or write to object fields
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Explain an Object’s Lifecycle (creation, “dereference by reassignment” and garbage collection)
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Develop code that uses wrapper classes such as Boolean, Double, and Integer
Using Operators and Decision Constructs
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Use Java operators; use parentheses to override operator precedence
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Test equality between Strings and other objects using == and equals ()
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Create if and if/else and ternary constructs
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Use a switch statement
Creating and Using Arrays
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Declare, instantiate, initialize and use a one-dimensional array
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Declare, instantiate, initialize and use multi-dimensional arrays
Using Loop Constructs
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Create and use while loops
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Create and use for loops including the enhanced for loop
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Create and use do/while loops
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Compare loop constructs
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Use break and continue
Working with Methods and Encapsulation
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Create methods with arguments and return values; including overloaded methods
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Apply the static keyword to methods and fields
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Create and overload constructors; differentiate between default and user defined constructors
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Apply access modifiers
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Apply encapsulation principles to a class
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Determine the effect upon object references and primitive values when they are passed into methods that change the values
Working with Inheritance
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Describe inheritance and its benefits
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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
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Determine when casting is necessary
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Use super and this to access objects and constructors
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Use abstract classes and interfaces
Handling Exceptions
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Differentiate among checked exceptions, unchecked exceptions, and Errors
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Create a try-catch block and determine how exceptions alter normal program flow
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Describe the advantages of Exception handling
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Create and invoke a method that throws an exception
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Recognize common exception classes (such as NullPointerException, ArithmeticException, ArrayIndexOutOfBoundsException, ClassCastException)
Working with Selected classes from the Java API
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Manipulate data using the StringBuilder class and its methods
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Create and manipulate Strings
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Create and manipulate calendar data using classes from java.time.LocalDateTime, java.time.LocalDate, java.time.LocalTime, java.time.format.DateTimeFormatter, java.time.Period
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Declare and use an ArrayList of a given type
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Write a simple Lambda expression that consumes a Lambda Predicate expression