As a professional working with technology, I have observed how fast the work environment changes. The majority of the skills I learned in school 20 some years ago are outdated in my daily work. In todays fast changing environment, the most important skill is that of quickly learning new things. So basically the most important thing for schools is teaching students is how to learn new skills, adapt them and put them to use. With that respect exams are one way of testing this skill. However in reality you will always have access to information and tools.