Java I/O Streams

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

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

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

There are five subclasses of OutputStream class.These are -
1) FileOutputStream - For writing bytes into file
2) ObjectOutputStream - For writing objects and primitive data types to output stream
3) ByteArrayOutputStream - For output stream that writes byte into array
4) pipedOutputStream - For writing into a piped stream
5) FilterOutputStream - For filtering output into an existing stream
So, this is the correct answer.

This is the correct 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

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

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 reading 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.

This is the correct answer. Byte stream can be defined by using two class hierarchies. These two classes are Input Stream and Ouput Stream.

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.

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.

Both the options 1 &and2 are correct. So this is the correct choice.

Both the classes in option 2 and 3 are the only subclasses of InputStream class. So this is the correct answer.

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