Oracle 1Z0-805

Free Questions in OTE format

About Oracle 1Z0-805 dump

Language Enhancements

• Develop code that uses String objects in switch statements
  
• Develop code that uses binary literals and numeric literals with underscores
  
• Develop code that uses try-with-resources statements (including using classes that implement the AutoCloseable interface)
  
• Develop code that handles multiple Exception types in a single catch block
  
• Develop code that uses the diamond with generic declarations
  

Design Patterns

• Design a class using a Singleton design pattern
  
• Apply object composition principles (including has-a relationships)
  
• Write code to implement the Data Access Object (DAO) pattern
  
• Design and create objects using a factory pattern
  

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)
  
• Construct and use RowSet objects using the RowSetProvider class and the RowSetFactory interface
  
• Use JDBC transactions (including disabling auto-commit mode, committing and rolling back transactions, and setting and rolling back to savepoints)
  
• 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)
  
• Create and use PreparedStatement and CallableStatement objects
  

Concurrency

• Identify code that may not execute correctly in a multi-threaded environment.
  
• Use collections from the java.util.concurrent package with a focus on the advantages over and differences from the traditional java.util collections.
  
• Use Lock, ReadWriteLock, and ReentrantLock classes in the java.util.concurrent.locks package to support lock-free thread-safe programming on single variables.
  
• Use Executor, ExecutorService, Executors, Callable, and Future to execute tasks using thread pools.
  
• Use the parallel Fork/Join Framework
  

Localization

• Describe the advantages of localizing an application
  
• Define a locale using language and country codes
  
• Read and set the locale with a Locale object
  
• Build a resource bundle for a locale
  
• Call a resource bundle from an application
  
• Format dates, numbers, and currency values for localization with the NumberFormat and DateFormat classes (including number format patterns)
  

Java File I/O (NIO.2)

• Operate on file and directory paths with the Path class
  
• Check, delete, copy, or move a file or directory with the Files class
  
• Read and change file and directory attributes, focusing on the BasicFileAttributes, DosFileAttributes, and PosixFileAttributes interfaces
  
• Recursively access a directory tree using the DirectoryStream and FileVisitor interfaces
  
• Find a file with the PathMatcher interface
  
• Watch a directory for changes with the WatchService interface