Computer Hardware Devices

You can scan photo slides with the help of a slide scanner. The use of slide scanners thus enables people to digitalize photographs.

Correct option is 5 

A touch screen can be used as both input as well as output device.

In digital imaging, a pixel or pel (picture element) is a physical point in a raster image, or the smallest addressable element in a display device. So, it is the smallest controllable element of a picture represented on the screen.

Option (2) is the correct answer. We can only type with a keyboard, and not with mouse and joystick.

Punched card is not associated with personal computers. A punched card is a piece of stiff paper that contains either commands for controlling automated machinery or data for data processing applications.

When multiple users access a central computer simultaneously, each user needs a terminal (keyboard and display) to communicate with the central system. Terminals allow many users to share the central computer's resources through time-sharing.

Intelligent terminals have their own processor and memory, allowing users to program them for specific tasks. They can execute instructions independently without constant mainframe communication. Dumb terminals and VDTs only display and send data, while smart terminals have limited processing capabilities but aren't user-programmable.

Desktop and laptop are types of computers whereas a stereo is a device for playing music.

An input device sends data to the computer for processing. Examples include keyboard, mouse, and scanner which take user input and feed it into the computer system.

A touch screen is an input device that detects touch input and translates it into commands. While it can be part of a display system (showing output), the touch detection itself is purely an input function. It is not a storage medium or operating system.

'Dark' and 'light' are opposite to each other. Other two options have similar pairs.

The main function of the dialog system of automated online assistants is to translate the human-generated input into a digital format that the automated online assistant can use for further processing by its expert system, as well as interpret whatever solutions or replies it generates back to what a human user understands, and optimally in a way as natural and user-friendly as possible.

This device is connected to the input stream from which data is extracted and provided to the program for manipulation.