Importance of mock tests

The topic Maintain Appropriate End-Devices and Industrial Network Infrastructure Devices carries 17% weight in the 200-401 certificate exam. And i was particularly weak in this topic. Now, if i had skipped this topic or left it as it is, i would have lost my score in the exam. Hence, mock tests helps in covering such topics by including questions on them. IMINS online mock tests are really quite helpful and supportive.