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It is very essential to understand the nature of competitive examinations for deciding how to approach them. Never try to be the best. Always try to do your best effort which you can. It protects you from undue pressure before competition. Don't make yourself too ambitious by trying to respond all the questions correctly in the limited time. Pass over the difficult questions. It will be foolish to waste time to crack first the hard nuts. Save your time for responding comparatively easy questions and tricky questions first then after rest.
We should understand that competitive examinations are very different from school/college examinations, which aim at assessing the knowledge or talent of the aspirants with reference to certain predetermined standards, and awarding them marks, pass, rank, distinction, etc. If the aspirants do not come up to a particular level of proficiency, they do not pass. On the other hand, there is no pass or failure in a competitive test.
Any competitive test has the limited goal of ranking the aspirants based on relative merit. Because of this reason, the questions in many competitive examinations are of the multiple-choice objective type. All questions would be of equal marks and compulsory, irrespective for their difficulty levels.
A competitive test is more a time test with proper management than a knowledge test. Even the best aspirant may not be able to answer all the questions correctly in the allotted time; nor is it necessary.