Object-Oriented Programming

Character class does not take string as argument (refer API).

'instanceof' is an operator, which is used to know the type of an object during runtime.

'this' is used for calling same class constructor, and 'super' is used for calling parent class constructor. So, this is the most appropriate answer.

This option is true because methods, which are declared in inteface are by default public and abstract.

Return type of finalize() method is protected and this method is called by the garbage collector on an object, when garbage collection determines that there are no more references to the object.

Default is known as package accessible modifier because it is accessible in the same package where it is declared.

When we create reference/object of any class, which is accessible, then non static block is called.

This is the correct answer. There are 7 subclasses of the 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.

There five subclasses of the OutputStream class 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. Byte stream can be defined by using two class hierarchies. These two classes are :

1. InputStream
2. OutputStream

This is the correct answer. Character stream class is defined by using two class hierarchies. These classes are:

1. Reader class
2. Writer class. 

As explained, both options 1 and 2 are correct. 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.

There are 7 subclasses of the 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.

This .NET cryptographic class defines a wrapper object to access the CSP implementation of the SHA384 algorithm.