What primary function do actuators serve in a computer system?

Converting digital signals into sound

Transforming energy into physical movement

Which of the following best describes the function of a barcode scanner?

Converting sound waves into electrical signals

Capturing light to create digital images

Using a red laser to scan and decode barcodes

Displaying images on a large screen

What technology do LCD screens rely on to display images?

Pixels organized in a matrix formation with a backlight

How do DLP projectors manipulate light to create images?

Using three mirror filters to break down an image into red, green, and blue wavelengths

Employing millions of micro-mirrors on a microprocessor

Using liquid crystals to form pixels

What is a significant advantage of laser printers over inkjet printers?

Producing high-quality images and graphics

Being more cost-efficient for color printing

Producing multiple copies quickly and efficiently

Suitable for low to moderate volume printing needs

What makes OLED screens different from traditional LCD screens?

Use of a backlight for illumination

Use of organic carbon compounds to create semiconductors

In what type of applications are 3D printers significantly used?

Displaying presentations on large screens

Capturing high-quality digital images

Creating prototypes and medical applications like prosthetics

Scanning documents for digital storage

How does an optical mouse detect movement?

By converting sound waves into digital signals

By using a laser to detect and track movement

By displaying images on a screen

What is a common application of QR codes?

Producing physical copies of digital documents

Displaying computer outputs on large screens

Directing users to websites for additional information

Converting digital audio signals into sound waves

Input and Output Devices Free MCQ Practice Test with Solutions

	Computer for GCSE/IGCSE 92 docs\|30 tests

	Computer for GCSE/IGCSE 92 docs\|30 tests

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