Hey Vinita,

he main thing first of all the question you asked about which of the following subject is consisting of the Hardware and whats the major difference Then here is what you need :-

1. Computer Science Engineering(CSE) : - This is the part of engineering where many gets confused. This is a slight different from COMPUTER ENGINEERING. In Computer Engg. the main aspect is to get the all over information whether it is hardware or the Software. 
   While the CSE is related with the Design of the compiler and how the working of the computer and their compilers works here also you will learn about the software and programming but it is more concerned with the COMPILERS DESIGN and its WORKING. While the CE works wuth the hardware like Micro - Processor and the software part.
2. Information Technology : - This is the field only related to the Software and the Programming base. It doesnt include the hardware part or any sort of such subjects, It is purely concerned with the Programming part.

CS is mostly about understanding the inner workings and concepts behind programming and computers whereas IT is more about applying these concepts in real life.


Differences:

The CS engineering programme usually deals with how to build micro processors, how to write a compiler etc. IT is the business side of computers - usually dealing with databases, business, and accounting. One way to think of it is that IT deals with the application of computing technology to real life processes and CSE deals with the science that facilitates these applications.

If you have to choose between IT and CSE and have both options in hand, it would be wise to decide it on the basis of the reputation and standing of the college rather than the branch. If you have to choose between IT and CSE in the same college, see what excites you more, design of computers and computing systems or using computers to solve information management requirements of organisation.


Good Luck.