What is the primary function of an input device?

• To send data to a computer for processing

• To display processed data to the user

• To store data permanently

• To control the flow of electricity in a circuit

Which of the following is an example of an input device?

• Barcode scanner

• LED screen

• Laser printer

• Speaker

What is the primary function of an output device?

• To present processed data to the user

• To capture data from the environment

• To store large amounts of data for later use

• To convert signals from analog to digital

Which of the following is an example of an output device?

• Laser printer

• Microphone

• Barcode scanner

• Keyboard

What is the main purpose of a sensor?

• To detect and measure physical changes in the environment

• To convert digital data into human-readable form

• To store information temporarily for processing

• To send instructions to the CPU

Which of the following sensors would be most suitable for detecting gas leaks?

• Gas sensor

• Temperature sensor

• Infra-red sensor

• Proximity sensor

What type of sensor is used in automatic street lighting systems?

• Light sensor

• Proximity sensor

• Moisture sensor

• Magnetic field sensor

Which sensor would be best for detecting motion in a security system?

• Infra-red sensor

• Flow sensor

• Acoustic sensor

• pH sensor

What is the primary function of an accelerometer sensor?

• To measure changes in velocity or movement

• To detect sound levels

• To monitor air humidity

• To measure the strength of a magnetic field

Which sensor is used in thermostats to control room temperature?

• Temperature sensor

• Pressure sensor

• Moisture sensor