File Handling and Design Patterns Overview

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Questions and Answers

Which of the following is NOT a type of design pattern?

  • Adapter
  • Iterator
  • Singleton
  • Buffer (correct)

Character stream classes perform operations on byte data.

False (B)

What is the primary use of the File class in file handling?

To create, delete, and manage files and directories.

In file handling, __________ refers to the method of accessing data at any position in a file.

<p>Random Access</p> Signup and view all the answers

Match the following stream classes with their corresponding types:

<p>ByteStream = Handles binary data CharacterStream = Handles character data InputStream = Reads data from files OutputStream = Writes data to files</p> Signup and view all the answers

Flashcards

File Handling

Techniques for reading from and writing to files.

Stream

A sequence of data that flows in or out of a system.

Byte Stream

Stream dealing with individual bytes of data.

Character Stream

Stream handling characters (text).

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Input/output Exceptions

Errors that arise during file operations.

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File Class

Provides methods to interact with files.

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Creating Files

The process of making a new file.

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Reading/Writing Characters

Operations handling textual data in files.

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Reading/Writing Bytes

Operations handling raw binary data in files.

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Concatenating Files

Joining multiple files.

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Buffering Files

Storing data temporarily to improve performance.

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Random Access Files

Files allowing access to data at any point.

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Design Patterns

Proven solutions to common programming problems.

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Adapter Pattern

Converting an interface into one clients expect.

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Singleton Pattern

Ensuring only one instance of a class exists.

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Iterator Pattern

Allowing sequential access to elements of a collection.

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Study Notes

Design Patterns

  • Design patterns are not a type of stream class. Design patterns are reusable solutions to common software design problems, while stream classes are used for data input and output.

Character Stream Classes

  • Character stream classes work with data as characters rather than bytes. They are essentially a layer above byte streams, transforming byte data into characters. This simplifies working with textual data.

File Class

  • The primary use of the File class is to manipulate files and directories. It provides methods for operations such as creating, deleting, renaming, and getting information about files and directories.

Random Access

  • Random access refers to reading or writing data at any position within a file without having to read through preceding data. This allows for direct access to specific parts of the file, which can be beneficial for large files or applications requiring fast data access.

Stream Class Types

  • FileInputStream and FileOutputStream are byte stream classes. They work directly with bytes and are suitable for handling binary data.
  • FileReader and FileWriter are character stream classes. They work with character data and are designed for text-based files.
  • ObjectInputStream and ObjectOutputStream are used for serialization and deserialization of objects. They allow you to save and load object data to and from files.

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