Don't expect the exam questions to be arranged in the order of objectives. And also at a glance some questions may seem to be testing a particular area of language content, but what it is actually testing can be some other area. Therefore read the question carefully before coming to a conclusion of which concept is being tested. Other thing is that, according to my experience, the difficulty level of the questions may vary throughout the paper with no specific pattern. It is not that easy questions come first and the difficulty level gradually increases as you go on.
"Simplicity is the ultimate sophistication..." ~Leonardo da Vinci~