In the same way I have elaborated an index of trailhead modules to work on if you want to get App Builder certification, I have created a similar index for Platform Developer I. Here you have the index:
Somebody asked me which trailhead modules could help for obtaining platform app builder certification. What I have done is to elaborate an index of them, in order you can practice some of the concepts that are asked in the certification. Obviously, doing this modules is not enough for passing the exam. However it is a good start point. Here you have my index:
…Originally posted in medium…
Are you a Visualforce developer? Do you want to transition to #Lightning? Don’t be scared about it! Lightning Components is a new technology that can seem very different to Visualforce, as the way of programming is pretty different. Despite the learning curve is a bit sharped, once you have acquired skills on Lightning Components development, you will develop components at the speed of light, in comparison with Visualforce development! So, don’t miss the next 5 tips:
So, what’s the frightening Lightning Locker Service? It is a combination of security features that have been implemented for you in order your Lightning Components are secure, and other components don’t break yours! So, no frightening at all, right?