The Tukka Master Gogo (Intelligent guesses)
You have to bring the number of unanswered questions as close to 8 as possible to avoid the penalty. There will be a higher probability of instances that require you guessing rather than being sure. Follow the usual process: Eliminate the options, evade the honeytraps (lucrative too good to be true) options, and jump in the bandwagon - Be a Tukka master.
Decision Making (Being as ethical as one can be)
This is the section unique to the XAT. You need to be exposed to a few questions of this type to understand the tricks of the trade. You are required to make business decisions and expected to be ethical. This is where most test-takers fail.
The simple rule-book is
1. Identify all the stakeholders being affected by your decision and chose one that satisfies the maximum number of people or harms the least (This is not a panacea, just a guiding principle and it shall fail at some instances).
2. Answer logically, do not be swayed away by emotions. Do not choose options that are too harsh or extreme (like firing an employee directly for minor misconduct, chose to warn first).
3. Do not focus on increasing or maintaining profits of the organization (avoid by hook or crook I shall have it).
4. Do not answer in a way that displays undeterred loyalty to the organization even when the decision is unethical. It is part and parcel of the corporate world is not the mindset you need to have while answering.
5. Go through the DM section specifically of the official last year's papers. The download links are available below.
Last Years Papers
XAT 2018: https://bit.ly/2QuFqrW
XAT 2017: https://bit.ly/2stM3mh
XAT 2016: https://bit.ly/2ZyIzLj
XAT 2015: https://bit.ly/2Zy4Dpm