SLR18 | Barcode Readers, Cameras, Laser printers & RFID

How do barcode readers scan barcodes?

• By using a laser to reflect light off the barcode

• By using a camera to take a picture of the barcode

• By using a magnetic strip to read the barcode

• By using sound waves to detect the barcode

What is the primary function of a digital camera's image sensor?

• To store images

• To capture light and convert it into an electronic signal

• To print images

• To focus the lens

Which component in a laser printer is responsible for transferring toner to paper?

• The fuser

• The drum

• The laser

• The paper tray

What does RFID stand for?

• Radio Frequency Identification

• Remote Frequency Identification

• Rapid Frequency Identification

• Radio Frequency Interference

Which of the following is a common application of RFID technology?

• Scanning groceries at a supermarket

• Tracking inventory in a warehouse

• Capturing images for social media

• Printing documents

Which type of barcode reader is most commonly used in retail environments?

• Pen-type reader

• Laser scanner

• CCD reader

• Camera-based reader

What is the role of the fuser in a laser printer?

• To apply toner to the paper

• To melt the toner onto the paper

• To feed paper into the printer

• To clean the drum

Which of the following is a type of barcode reader?

• Inkjet reader

• Laser scanner

• Thermal reader

• Dot matrix reader

What is a key advantage of using RFID over traditional barcodes?

• RFID tags are cheaper than barcodes

• RFID tags can be read without line of sight

• RFID tags are more durable than barcodes

• RFID tags are easier to print

How does a laser printer create an image on the drum?

• By using a needle to etch the image

• By using a laser to discharge static electricity

• By using ink to draw the image

• By using heat to burn the image