Oracle 1Z0-808

Free Questions in OTE format

About Oracle 1Z0-808 dump

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.
  

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; including 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 array
  

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; 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
  

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
  

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)"
  

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