Practice makes a man perfect just a saying but it really does what it says. Practice serves as tool for mastering the concepts and an examination like GATE does not give any scope to commit mistakes. Based on the new examination pattern implemented in 2014 to conduct GATE in the online format, Arihant has yet again come up with the revised edition of the Practice Workbook for GATE Computer Science and IT Engineering 2015. The present books aims at providing comprehensive understanding of the various concepts covered under the GATE Computer Science and IT Engineering curriculum. This book aims at real and effective practice of the various concepts like Programming & Data Structure, Theory of Computation, Operating System, etc which are covered under the syllabus of GATE Computer Science and IT Engineering. The book contains 10 practice sets which have been designed according to the online pattern for GATE 2015. The practice papers cover all types of questions recently asked in the GATE Computer Science and IT Engineering Exam so as to make the candidates aware of the various types of questions asked in the exam. Stepwise solutions to all the questions have been given to increase the edificial knowledge of the aspirants. Each practice set contains MCQs and numerical answer type questions based exactly on the Online Test pattern. Apart from the practice sets, the book also contains last four years(2011-2014) solved papers GATE Computer Science and IT Engineering to give the candidates an insight into the pattern of examination and the questions asked therein. Also the book comes with a CD-ROM containing 10 Practice Sets designed strictly on the Online Format facilitating practice in the actual format which the aspirants will face when they appear for GATE 2015. As the book contains practice sets strictly designed on the lines of the online pattern of GATE 2015, it will prove to be the most fruitful resource for preparation of GATE Computer Science & IT Engineering 2015.