Help needed regarding preparation for Croma Tech Grandmasters 3 and TCS ITWiz.

Hello,

I recently won a IT Quiz at KES College, Mumbai. So, Now I want to participate in Croma Tech Grandmasters 3 and TCS ITwiz Mumbai Prelims. I have solved last 3 years TCS ITWiz papers till now. How should I prepare further for both the events? Suggestions are greatly appreciated. Thanks!
 
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