Can I connect both input and output devices to my bolt at time?
Yes.
For example LED’s are output devices and LDR Sensor is an input device.
So when I create a product, should I select I/P device or O/P device?
According to your need
I want to use led and ldr at a time.So should i give i/p or o/p device?
Use gpio pins declare them separately
Yes we can connect according to our need as ldr and led both are input and output devices respectively can be connected together at a time in bolt .