IES 2017 preparation question???

Dear Members,
I am preparing for IES2017 for prelims on 8th januvary what should i study for the shake of prelims ??? whether i should study both paper1 paper2 syllabus or paper2 syllabus is sufficient? asusal the general aptitude which is compulsory, but i am having doubt that whether it necessary to study both paper1 syllabus paper2 syllabus for preparation for prelims on8th January??? or paper 2 is sufficient plzz answer me....,,