Can a sink variable be accessed outside of the current component?

Questions
1

It looks like it’s impossible to change a variable from another component. (so variables can be accessed anywhere but only changed in its component. Am I right?

So this code it’s impossible:

graph1.number("a_1"):

when input1.numericValue = numericValue("2")  1

otherwise 0

Thanks!

2

That looks valid. Although you can just have ‘input1.numericValue = 2’ instead of ‘numericValue(“2”)’