Question

If the IOData.dat file does not exist, what will happen when the following statement is executed? RandomAccessFile randomFile = new RandomAccessFile("IOData.dat", "rw");

Answer 1

Answer:

Creates the file with the given file name.

Explanation:

• Here, the constructor is RandomAccessFile randomFile = new RandomAccessFile("IOData.dat", "rw");

• The general form to construct the object of  RandomAccessFile class is RandomAccessFile randomFile = new RandomAccessFile(String Filename, String mode);
• Here, the String Filename is the filename of the file that has to executed with the String mode.
• The modes decide the accessibility of the file, types like  r - 'read only' the file , rw - 'read and write' the file. If the file doesn't exists it creates the file with the given filename.
• If a file with read only mode is tried to write in the file, then it throws exceptions.