That's a monitor or a screen. Originally these were cathode ray tubes, but current technology uses liquid crystal displays.
Input Device
Yes, it is a method for inputting information; it is a peripheral device
It outputs information from the computer.
monitor
What interface that controls a peripheral device is.
yes, pen-drive is a peripheral device.
An output device, such as a monitor (screen), or a printer.
a peripheral device uses this to attach to a computer
Printer
peripheral device
CPU is not a peripheral device.
No,hard disk is not a peripheral device it is esseintial part of computer