Preparations for Java 8 certifications

What to bring:

  1. ID

Topics in the exam:

  1. 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; including 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.
  2. 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.
  3. Using Operators and Decision Constructs
    Use Java operators; including parentheses to override operator precedence
    Test equality between Strings and other objects using == and equals ()
  4. 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 array
  5. 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
  6. 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; including impact on default 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
  7. Working with Inheritance
    Describe inheritance and its benefits
    Develop code that demonstrates the use of polymorphism; including overriding and object type versus reference type
    Determine when casting is necessary
    Use super and this to access objects and constructors
    Use abstract classes and interfaces
  8. 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, ArithmeticExcpetion, ArrayIndexOutOfBoundsException, ClassCastException)”
  9. Working with Selected classes from the Java API
    Manipulate data using the StringBuilder class and its methods
    Creating and manipulating 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
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