Advanced Mobile App (MODULE 4 PRE-TEST)

What is the difference between a QR code and a barcode?

• QR codes are two-dimensional while barcodes are one-dimensional

• QR codes contain letters while barcodes contain only numbers

• QR codes are red while barcodes are black

• QR codes can only be scanned by smartphones while barcodes can be scanned by any optical scanner

Name three things you can do with an activity starter.

• Open other apps, launch a web browser, and send text messages

• Take photos, record videos, and set alarms

• Create QR codes, scan barcodes, and generate treasure hunt clues

• Send emails, make phone calls, and play music

What is a URI?

• A type of barcode used for identifying products in supermarkets

• A unique code assigned to each mobile app for identification

• A string of characters used to identify a name or a web resource

A QR Code is a two-dimensional barcode and it is also called a _________ code.

This group of the Palette in App Inventor where you can find the BarcodeScanner component?

This block of the BarcodeScanner components indicates that the scanner has read a (text) result and provides the result.

• AfterScan

• DoScan

• Result

• ActivityStarter

A method or procedure of the BarcodeScanner component that when it is called, it begins a barcode scan, using the camera.

• AfterScan

• DoScan

• Result

• ActivityStarter

A component of App Inventor use for scanning a QR code and getting back the resulting string.

• QRCodeScanner

• BarcodeScanner

• ActivityStarter

• Sensor

How many argument does the AfterScan event-handler of the BarcodeScanner component?

• 1

• 2

• 3

• 4

• None

When scanning a barcode or QR code, the phone uses its camera?

• True

• False