Input Device QUIZ ( Mr A )

How does a resistive touchscreen work?

• A. By registering touch input through pressure applied to flexible layers

• B. By scanning fingerprints for security verification

• C. By projecting holographic images for interaction

• D. By analyzing voice commands for operation

What is the operating principle of an infrared touchscreen?

• A. By detecting interruption of infrared light beams when touched

• B. By measuring the screen's temperature changes

• C. By analyzing sound waves produced by tapping

• D. By emitting visible light to track finger movements

How does a capacitive touchscreen function?

• A. By sensing changes in electrical fields when touched by a conductive object

• B. By emitting ultrasonic waves to detect gestures

• C. By using pressure sensors to register touch input

• D. By analyzing heat signatures left by fingers on the screen

How does a keyboard function as an input device?

• A. By translating key presses into electrical signals for the computer

• B. By displaying characters on a screen when touched

• C. By projecting a virtual keyboard onto a surface for typing

• D. By scanning fingerprints for user identification

What is a QR code and how does it function?

• A. A type of barcode that can store more data and is scanned using a smartphone camera

• B. A code for quantum computing operations in computers

• C. A code for quick refunds at stores using a special reader

• D. A code for quality control in manufacturing plants

How do microphones operate as input devices?

• A. By converting sound waves into electrical signals for recording or amplification

• B. By emitting sound waves to cancel out background noise

• C. By analyzing sound frequencies for music composition

• D. By transmitting radio signals for communication

What is a QR code and how does it function?

• A. A type of barcode that can store more data and is scanned using a smartphone camera

• B. A code for quantum computing operations in computers

• C. A code for quick refunds at stores using a special reader

• D. A code for quality control in manufacturing plants

What is the purpose of an input device in a computer system?

• A. To send data into the computer

• B. To display output from the computer

• C. To process data within the computer

• D. To store data in the computer

What are three advantages of using a barcode system?

• A. Improved inventory management, faster checkouts, reduced human errors

• B. Enhanced customer service, lower prices, increased security

• C. Better employee training, higher profits, advanced analytics

• D. Wider product selection, personalized discounts, eco-friendly packaging

How do microphones operate as input devices?

• A. By converting sound waves into electrical signals for recording or amplification

• B. By emitting sound waves to cancel out background noise

• C. By analyzing sound frequencies for music composition

• D. By transmitting radio signals for communication