Java I/O Streams

This is correct answer.
All of the given methods are defined in the OutputStream class.

Byte stream can be defined by using two class hierarchies. These two classes are input stream and Output stream.

Option 1 and 2 are the correct choices.

There are 6 subclasses of reader Class in Java. These are 1) BufferedReader for buffering other readers 2) ChararrayReader for reading from char array 3) FilterReader for readin filter streams 4) InputStreamReader for reading a character stream 5) PipedReader for reading from pipe 6) StringReader for reading from a string.So this is the correct answer.

All of the methods are defined in the Reader class. So this is the correct choice.

This is the correct answer. Streams can be used to input and output the data. They are of two types. Byte Stream - for handling binary data. Character Stream - for handling data such as sequence of characters. Thus this is the correct answer.

There is no subclass of Reader class named InputReader. The correct name is InputStreamReader used for reading a character stream. So this is the correct answer according to the question.

This is the correct answer.

This is the correct answer. There is no Subclass named charWriter. The correct name is CharArrayWriter which is used for writing to a char array. So this is the correct answer according to the question.

All of the given methods are defined in the File class. So this is the correct answer.

All of the methods are defined in the Input Stream class. So this is the correct choice.

There are five subclasses of Output Stream class.
These are
1) File Output Stream - for writing bytes into file.
2) Object Output Stream - for writing objects and primitive data types to output stream.
3) Byte Array Output Stream:- For output stream that writes byte into array.
4) piped Output Stream - for writing into a piped stream.
5) Filter Output Stream : for filtering output into an existing stream. So this is an incorrect answer.

Character stream class is defined by using two class hierarchies. These classes are Reader class and Writer class.

There are 7 subclasses of Writer class in Java.
These are
1) OutputStreamWrite for writing a character stream
2) BufferedWriter for buffering other writers
3) PrintWriter for writing formatted data
4) PipedWriter for writing to a pipe
5) CharArrayWriter for writing to a char array
6) StringWriter for writing to a string
7) FilterWriter for writing filtered streams. So this is the correct answer.

There are seven subclasses of InputStream class.
These are
1) FileInputStream for reading bytes from a file
2) ObjectInputStream for reading objects and primitive data types from input stream
3) SequenceInputStream for reading from a sequence of streams
4) ByteArrayInputStream for a stream that reads a byte array
5) pipedInputStream for reading from a piped stream
6) FilterInputStream for filtering input from the existing Stream
7) StringBufferInputStream for reading from a string.