the monitor.. read your text book, youll prob find the answer sooner, and you might learn something, that is why your going to school this is a computer class question if i ever saw one
Plug & Play devices can be inserted/removed while Computer is running.
Displays, printers, plotters etc An output device is any peice of hardware that takes data from a computer and does something with it.
Kepboard and touchpad etc.
A notebook computer is both an input, proccesing and output device. eg, keyboard inputs keypresses, proccesor processes them and screen outputs them as letters on the screen. Keyboard:Input...
Microphone converts Audible Sound into digital signals that's why it will be considered as an INPUT device not an Output device.