What is User Agent?

This component of an electronic mail system provides service to the user to make the process of sending and receiving a message earlier.  A user agent is a software that composes,  read,  replies and forward messages. It also handles the mail boxes.

What is Recursive Function ?

A recursive function is a function that contain a call to the function itself. Recursive function allows us to divide complex problem into identical single cases which can be handled easily.

What is Constructor ?

A constructor is a special method that is created when the object is created. This particular method holds the same name as that of the object and it initialises the instance of the object whenever that object is created. The constructor also usually holds the initialisations of the different declared member variables of its object. Constructor does not return a value.

What does MIME stands for and where it is used ?

Multipurpose internet mail extensions. It is an Internet standard that extends the format of e-mail to support, text in character sets other than ASCII and non text attachments.

What information does a superblock of a file system contain ?

A superblock is a record of the characteristics of a file system including its size, block size, the empty and filled blocks and their respective counts, the size and location of the inode tables, the disk block map and usage information.