How do I prepare for the IIIT Hyderabad PGEE exam for the computer science branch?

My sister gave IIIT Hyderabad PGEE Exam in 208 and claims it to be easier than GATE. The number of questions varies every year but the pattern somewhat remains similar. The exam had two papers.

Paper 1 - Aptitude (Time: 90 minutes)

• This one comprised 40 questions out of which 20-25 were quantitative questions, 5-10 questions were based on programming and mathematics, and 10 questions were based on comprehension
• Some of the most common topics covered were Calendar, Clocks, Directions, Blood Relation, Time and Distance, Probability Syllogism, Number and Series, Data sufficiency, and Propositional logic.
• As a whole the level of difficulty was easy to medium. 

Paper 2 - Technical (Time: 90 minutes)

• This paper comprised 60 questions out of which 20-25 questions were from previous years Gate/Isro paper. The remaining questions were related to simple subject knowledge. 
• The level of programming questions and data structure questions was higher than in the Gate exam.
• Each question had more than one answer and not ticking all the right ones would lose you marks. 
• Again, the level of difficulty was easy and anyone who had cleared GATE could clear this too. 

It's best to adopt the same strategy you used for GATE preparation and you will surely get good results.