Memory Stick is a flash memory card. It is a data storage. In some situations it can be an input device (when you load pictures from it into an image editor), in some it can be an output device (when you write edited pictures back to your Memory Stick).
A USB stick is both an input and an output device. Data can be written to the stick, and can be extracted from the stick.
No, it is an external data storage device. Analogous in function to an external hard disk drive, but all solid state with no moving parts.
Main memory is neither of these.
No, it is an external data storage device. Analogous in function to an external hard disk drive, but all solid state with no moving parts.
It is an input device.
A joy stick is an input device.
Both.
it is a input device
Because it is an external device connected to the computer that translates user input into output on the screen.
output device No The CPU and memory are located on the motherboard
Memory Stick, A later version is the Memory Stick Pro and Memory Stick Pro Duo.
It is a removable disk and a USB drive.