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M4-R5.1 — Sensor, Actuator & Microcontroller MCQ
25 Questions • M4-R5.1
20:00
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1
A sensor in IoT is used to?
A
Perform physical actions
B
Detect and measure environmental data
C
Store data
D
Display output
2
An actuator in IoT is used to?
A
Detect changes
B
Perform physical actions based on commands
C
Transmit data wirelessly
D
Store configuration
3
DHT11 sensor measures?
A
Distance
B
Temperature and humidity
C
Light
D
Gas
4
HC-SR04 is a type of?
A
Temperature sensor
B
Gas sensor
C
Ultrasonic distance sensor
D
Light sensor
5
PIR sensor is used to detect?
A
Temperature
B
Motion (Passive Infrared)
C
Light intensity
D
Gas
6
Arduino is commonly used as?
A
A web server
B
A microcontroller board for IoT
C
A database server
D
A display unit
7
Raspberry Pi differs from Arduino mainly because it?
A
Costs more
B
Is a full single-board computer running Linux
C
Has more pins
D
Uses solar power
8
In Arduino, pinMode() is used to?
A
Read sensor value
B
Set a pin as INPUT or OUTPUT
C
Send data to cloud
D
Control LCD
9
analogRead() in Arduino reads?
A
Digital HIGH/LOW
B
Analog values (0–1023)
C
Serial data
D
Memory
10
Relay in IoT circuits is used to?
A
Measure temperature
B
Switch high-power AC devices using low DC signal
C
Display data
D
Store memory
11
Sensor detects?
A
Software bugs
B
Physical changes (temp, light, motion)
C
Network issues
D
Printer jams
12
Actuator converts?
A
Digital to analog only
B
Signal/energy into physical action
C
Light to sound
D
Data to text
13
Temperature sensor example?
A
LDR
B
DHT11/DHT22
C
PIR
D
Ultrasonic
14
PIR sensor detects?
A
Temperature
B
Motion (Passive Infrared)
C
Light
D
Sound
15
LDR stands for?
A
Light Dependent Resistor
B
Low Data Rate
C
Linear Digital Reader
D
Light Digital Receiver
16
Ultrasonic sensor measures?
A
Temperature
B
Distance using sound waves
C
Light intensity
D
Humidity
17
Arduino is a?
A
Programming language
B
Open-source microcontroller platform
C
Sensor
D
Actuator
18
Raspberry Pi is a?
A
Sensor
B
Actuator
C
Single-board computer
D
Only a microcontroller
19
LED is an example of?
A
Sensor
B
Actuator (output)
C
Microcontroller
D
Processor
20
Servo motor is an?
A
Sensor
B
Actuator
C
Microcontroller
D
Power supply
21
Microcontroller contains?
A
Only CPU
B
CPU, memory, I/O in single chip
C
Only memory
D
Only I/O
22
GPIO stands for?
A
General Purpose Input Output
B
Global Processing I/O
C
Generic Parallel I/O
D
Ground Power Input Output
23
Analog sensor provides?
A
Only 0 or 1
B
Continuous range of values
C
Only text
D
Only images
24
Digital sensor provides?
A
Continuous values
B
Discrete/binary values
C
Floating point
D
Random values
25
Breadboard is used for?
A
Cooking
B
Prototyping circuits without soldering
C
Programming
D
Printing
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Total Questions:
25
Time Limit:
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Subject:
M4-R5.1
Passing:
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