Java Core Classes and Threads

The finally block in Java is to deal with certain statements irrespective of whether an exception is raised or not.

 This method is used to store the characters in an array of bytes.

Hashcode() methods returns hashcode, which is a type of int. Hence, this is a correct option.

This option is valid because both first and third options are correct.

As explained all of the methods are defined in the Input Stream class. So, this is the correct choice.

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

As explained, all of the methods are defined in the Reader class. So, this is the correct choice.

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.

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.

As explained that all of the given methods are defined in the File class. So, this is the correct answer.

As explained, both the classes in option 2 and 3 are the only subclasses of the InputStream class. So, this is the correct answer.

This is the correct answer. Because there is no method defined in the String class named toLower(). So it cannot be invoked using the object of String class. The correct method is toLowerCase() which converts the characters to lowercase.

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

Both 1 & 2 options are valid functions in Java. So this is the correct answer.