Hello,

You haven't mentioned the name of the examination you have applied. You are supposed to book a slot to appear for the examination. There will be designated dates and time for the exam depending on your availability you can select the slot from the available slots. The slot booking may can wither be done while applying for the application or when the slot booking is scheduled. As you haven't specified the examination you haven't applied for it is difficult to provide the details as to when you need to book the slot. Please mention the name of the exam or you can visit the official website of the examination and carefully the read the instructions and check the schedule for slot booking.