Unit 9

Which of the following is an example of an input device?

• Monitor

• Printer

• Keyboard

• Speaker

Answer explanation

A keyboard is an input device used to enter data into a computer. In contrast, a monitor, printer, and speaker are output devices that display, print, or produce sound, respectively.

Which of the following is an example of an output device?

• Mouse

• Scanner

• Projector

• Microphone

Answer explanation

A projector is an output device that displays visual information on a screen. In contrast, a mouse and scanner are input devices, and a microphone captures audio input, not output.

What is the primary function of a scanner?

• To display images.

• To convert physical documents into digital images.

• To print documents.

• To play audio.

Answer explanation

The primary function of a scanner is to convert physical documents into digital images, allowing for easy storage and sharing. The other options, such as displaying images or printing documents, do not accurately describe a scanner's main purpose.

Which type of printer uses toner and a heated fuser to produce images?

• Inkjet printer

• Laser printer

• Thermal printer

• Dot matrix printer

Answer explanation

A laser printer uses toner, which is a fine powder, and a heated fuser to bond the toner to paper, producing high-quality images. In contrast, inkjet printers use liquid ink, thermal printers use heat-sensitive paper, and dot matrix printers use impact printing.

What is the purpose of a digitizer tablet?

• To display high-resolution images.

• To allow for precise drawing and input using a stylus.

• To scan documents.

• To play audio.

Answer explanation

A digitizer tablet is designed for precise drawing and input using a stylus, making it ideal for artists and designers. It allows for detailed control that other devices cannot provide.

Which connector is commonly used for connecting a monitor to a computer?

• RJ-45

• USB

• HDMI

• PS/2

Answer explanation

HDMI (High-Definition Multimedia Interface) is the most common connector for connecting monitors to computers, as it supports high-definition video and audio. Other options like RJ-45 and PS/2 are not used for video output.

What is the function of a webcam?

• To print documents.

• To capture and transmit video.

• To scan documents.

• To play audio.

Answer explanation

The primary function of a webcam is to capture and transmit video, allowing for video calls, streaming, and recording. Other options like printing or scanning are not related to a webcam's capabilities.

Which input device uses optical technology to detect movement?

• Keyboard

• Mouse

• Touchpad

• Microphone

Answer explanation

The mouse is an input device that uses optical technology, such as a laser or LED, to detect movement across a surface. This allows for precise control of the cursor on the screen, unlike the other options listed.

What is the purpose of a barcode reader?

• To print barcodes.

• To scan and decode barcodes.

• To display barcodes.

• To create barcodes.

Answer explanation

The purpose of a barcode reader is to scan and decode barcodes, allowing for quick data retrieval and inventory management. It does not print, display, or create barcodes.

Which output device produces sound?

• Monitor

• Printer

• Speaker

• Scanner

Answer explanation

The correct answer is 'Speaker' because it is the output device specifically designed to produce sound, unlike a monitor, printer, or scanner, which serve different functions.