Which are the valid ways to create DataInputStream streams?

A. new DataInputStream(new File("in.dat"));

B. new DataInputStream(new FileInputStream("in.dat"));

C. new DataInputStream("in.dat");

D. new DataInputStream("in.data","r");

You can do it
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  3. Any method in a supper class can be over ridden in its subclass.
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  5. With javadoc, which of the following denotes a javadoc comment?
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  19. Java is fully object oriented programme.
  20. Which key word can protect a class in package from accessibility by the classes outside the package?
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