Some Useful Books and sites for GATE , PSU exams and interviews(Computer science)

Computer Networks : by Narasimha karumachi careermonk publication
Algorithms and Data structures : by Narasimha karumachi careermonk publication
OS : Deitel and Deitel
Theory of Counting:  Disha publication(Good book for Permutation ,Combination and Probability)
C Programming : Test your C skills by Yashwant Kanetkar
Compiler : Compiler Construction - K.V. N Sunitha



Try to solve maximum questions :
                     Bits and bytes Vol 1 and Vol 2 by ACE publications
                   
                   
     Note:  may contain some errors but overall good books

Solve All Gate Previous papers
Websites:

1)For online Test series Try : http://virtualgate.in/login/index.php
         Note : This test series is completely free and contains good questions. Explanations and Discussions are available.

2) www. geeksforgeeks.org : Gate paper answers and explanations..

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Use multiple operating systems simultaneously

Hello friends,
              You can use several os on an existing host operating system. The additional operating systems, (each  known as a Guest OS), can be loaded and run, each with its own virtual environment. Here you can see two utilities helps to install more os inside one main os.
1: Virtual box

                                                                           


Features:

*64-bit guests (64-bit hosts with CPU virtualization extensions)
*3D virtualization
*Special drivers and utilities to facilitate switching between systems

Supported guest operation systems:  Windows, Linux, BSD, OS/2, Solaris
To download click here

2:VMware Workstation 

                                                                   

Features: 

*Testing of live cd without first recording them onto the discs.

* bridging to CD-ROM devices, hard disk drives, and USB devices 

* 3D Graphics Support

 Supported guest operation systems:Windows, Linux, BSD variants

To download click here

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