Since it takes current injected into the base-emitter junction of an NPN to turn it on, and while the CMOS is in the high-Z state it can neither source, nor sink current, then the NPN will be off.
I have a question in this. I connect the emitter to 5V. The collector is connected to 5V via a 1K ohm. I connect the load to the collector. I give voltage to the base via microcontroller. Now what will happen????