702 is just the 701 material but in practice, and equally as easy.
For instance on 701 you will get the question:
"Which of these connectors is used for Ethernet" with the answer being RJ-45
In 702, the question would be:
"You are setting up a wired network using Ethernet cabling. What connector must you ensure that all devices have to connect to the network?" Again, answer is RJ-45.
It is the same question, just in 702 it is worded into a scenario.
What preparation and materials have you used? I took mine using just prior knowledge and some practice questions. Was all of two days to get accustomed to the type of questions rather than fill in the knowledge. The exam is very easy compared to other qualifications provided you have the knowledge.