H446_1.1_Ch4_comprehension

When did barcodes first start appearing on grocery items?

• 1970s

• 1980s

• 1990s

• 2000s

What is one application of 2D barcodes?

• Tracking parcels

• Ticketless entry to concerts

• Shipping cartons

• Passenger luggage

Which type of barcode can hold more information?

• 1D barcode

• 2D barcode

• Linear barcode

• Pen-type barcode

How many different types of barcode readers are mentioned?

• Two

• Three

• Four

• Five

What is the primary function of the photo diode in a pen-type reader?

• To emit light

• To generate a waveform

• To measure the intensity of reflected light

• To scan the barcode directly

Why are pen-type scanners considered the most durable type of barcode scanner?

• They use a laser beam

• They are tightly sealed against environmental hazards

• They are the largest type of scanner

• They do not require direct contact with the barcode

What is a key limitation of pen-type scanners?

• They are too large for portable use

• They require direct contact with the barcode

• They are not durable

• They are expensive

How do laser scanners differ from pen-type scanners?

• They use a photo diode

• They use a laser beam as the light source

• They are not suitable for low-volume applications

• They are less reliable

What is one application of a camera-based imaging scanner?

• Cooking recipes

• Age verification by scanning a driving license

• Weather forecasting

• Playing video games

What type of sensor is used in higher-end digital cameras for better image quality?

• CMOS sensor

• Infrared sensor

• CCD sensor

• Ultrasonic sensor