WorksheetsComputer Science - Ch#5 - Input Devices
Total questions: 21
Worksheet time: 7mins
A device which is used to convert a physical document or picture into a digital form is called (a)
OCR Stands for:
Optical Character Registration
Optical Computer Recognition
Optical Character Recognition
Optical Computer Registration
The software which helps to convert a scanned picture into a text document is known as:
(a)
CT Scanner is an application of (a) Scanning
When a barcode scanner scans a barcode, no or littlie light is reflected from (a) lines
When the barcode is scanned the White(Light) and Black(Dark areas are scanned and converted to following binary digits:
Light=1 & Dark=0
Light=0 & Dark=1
Light=1 & Dark=1
Light=0 & Dark=0
The barcode number of the products in a store's database is known as the _________________ as each product has unique barcode
Main Field
Identity Field
Unique Field
Key Field
Which of the following is NOT an advantage of using barcode system at a store:
Automatic Stock Control
Easier to Update Prices of Items
Increases Profits
Quicker Process of Billing
As compared to barcodes, QR codes can hold up to _________ digits
5000
7000
10000
15000
The most commonly used input device for data entry is called:
(a)
Laser Mouse, Mechanical Ball Mouse, Tracker Ball, Touch Pad, are all types of:
Printing Devices
Pointing Devices
Sound Devices
Touchscreens
The kind of system which uses microphone to identify WHO is speaking is called:
Speech Recognition
Voice Recognition
Both
The kind of system which uses microphone to identify what is being said, is called:
Speech Recognition
Voice Recognition
Both
Which kind of touchscreen has the following attributes:
- Good visibility in strong sunlight
- Multi touch
- Durability
- Cant be used with gloves on
Capacitive
Resistive
Infrared
Which kind of touchscreen has the following attributes:
- Bad visibility in sunlight
- No Multi touch
- Can be used with gloves on
Capacitive
Resistive
InfraRed
The data read by sensors are _________ in nature
Analog
Digital
ADC stands for:
(a)
The (a) compares the data received from the sensor with the pre stored normal values
Automatic Street light system is an example of ______________ application.
Controlling
Monitoring
A system checks the moisture level of the soil in a farm. If the moisture level is low, it turns on the water sprinklers to water the plants. When the moisture level of soil becomes normal, the system turns off the water sprinklers. What kind of system is this?
Controlling
Monitoring
A system checks for the entry of a burglar in the building. If any motion is sensed by the sensors inside the building, the system locks all the gates of the building and switches on all the lights. What kind of system is this?
Controlling
Monitoring
