Delhi Police PC · Computer Knowledge
Keyboard, mouse, printer, scanner and monitor.
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Q1 · Input & Output Devices · EASY
Which of the following is an input device that converts printed text or images into digital form that can be stored and edited on a computer?
Q2 · Input & Output Devices · EASY
A user wants to enter text and commands into a computer quickly. The device has 104 keys including alphabets, numbers, function keys, and special keys like Enter, Shift, and Control. Which input device is being described?
Q3 · Input & Output Devices · MEDIUM
An office has a device that can produce both black-and-white and color output on paper. It uses inkjet technology where liquid ink is sprayed onto paper through tiny nozzles. The quality is measured in DPI (dots per inch). What type of device is this?
Q4 · Input & Output Devices · MEDIUM
A designer uses a pointing device that has two buttons and a scroll wheel. The device uses optical or laser sensors to detect movement on a surface, and this movement controls the cursor on the screen. If the device has a resolution of 1000 DPI, what does this specification indicate?
Q5 · Input & Output Devices · EASY
Which of the following devices is primarily used to capture graphical images and convert them into digital format?