Oracle 1Z0-803

Free Questions in OTE format

About Oracle 1Z0-803 dump

Java Basics

• Define the scope of variables
  
• Define the structure of a Java class
  
• Create executable Java applications with a main method
  
• Import other Java packages to make them accessible in your code
  

Working With Java Data Types

• Declare and initialize variables
  
• Differentiate between object reference variables and primitive variables
  
• Read or write to object fields
  
• Explain an Object's Lifecycle (creation, "dereference" and garbage collection)
  
• Call methods on objects
  
• Manipulate data using the StringBuilder class and its methods
  
• Creating and manipulating Strings
  

Using Operators and Decision Constructs

• Use Java operators
  
• Use parenthesis to override operator precedence
  
• Test equality between Strings and other objects using == and equals ()
  
• Create if and if/else 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
  
• Declare and use an ArrayList
  

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
  
• Apply the static keyword to methods and fields
  
• Create an overloaded method
  
• Differentiate between default and user defined constructors
  
• Create and overload 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

• Implement inheritance
  
• Develop code that demonstrates the use of polymorphism
  
• 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, RuntimeExceptions and Errors
  
• Create a try-catch block and determine how exceptions alter normal program flow
  
• Describe what Exceptions are used for in Java
  
• Invoke a method that throws an exception
  
• Recognize common exception classes and categories