M4-R5.1 Model Paper — Set 4 — MCQ Quiz | Free O-Level Study Notes & MCQs

1

What is the full form of MQTT? / MQTT का पूर्ण रूप क्या है?

A

Message Queuing Telemetry Transport

B

Message Query Telemetry Transfer

C

Message Queuing Transfer Transport

D

Message Queuing Telemetry Transfer

2

Which layer of the TCP/IP model is responsible for routing packets? / TCP/IP मॉडल की कौन सी परत पैकेट रूटिंग के लिए जिम्मेदार है?

A

Application Layer

B

Internet Layer

C

Transport Layer

D

Network Access Layer

3

What is the purpose of the 'pinMode()' function in Arduino? / Arduino में 'pinMode()' फ़ंक्शन का क्या उद्देश्य है?

A

To read the value from a pin

B

To write a value to a pin

C

To configure a pin as INPUT or OUTPUT

D

To delay the program execution

4

Which sensor is used to measure distance using sound waves? / ध्वनि तरंगों का उपयोग करके दूरी मापने के लिए किस सेंसर का उपयोग किया जाता है?

A

IR Sensor

B

LDR Sensor

C

Ultrasonic Sensor

D

DHT11 Sensor

5

What is the default PWM resolution on Arduino Uno? / Arduino Uno पर डिफ़ॉल्ट PWM रेजोल्यूशन क्या है?

A

8-bit (0-255)

B

10-bit (0-1023)

C

12-bit (0-4095)

D

16-bit (0-65535)

6

What is the purpose of the 'attachInterrupt()' function in Arduino? / Arduino में 'attachInterrupt()' फ़ंक्शन का क्या उद्देश्य है?

A

To detach an interrupt from a pin

B

To attach an interrupt to a pin

C

To disable all interrupts

D

To read the interrupt status

7

Which of the following is an example of an output device in IoT? / निम्नलिखित में से कौन सा IoT में आउटपुट डिवाइस का उदाहरण है?

A

Temperature Sensor

B

LED

C

PIR Sensor

D

LDR

8

What does the 'pulseIn()' function do in Arduino? / Arduino में 'pulseIn()' फ़ंक्शन क्या करता है?

A

Generates a pulse on a pin

B

Measures the duration of a pulse on a pin

C

Reads analog value from a pin

D

Configures a pin as output

9

What is the purpose of a resistor in an LED circuit? / LED सर्किट में रेजिस्टर का क्या उद्देश्य है?

A

To increase the brightness of the LED

B

To limit the current flowing through the LED

C

To store energy for the LED

D

To convert AC to DC for the LED

10

Which communication protocol uses a master-slave architecture with SS, MOSI, MISO, and SCK pins? / कौन सा संचार प्रोटोकॉल SS, MOSI, MISO और SCK पिन के साथ मास्टर-स्लेव आर्किटेक्चर का उपयोग करता है?

A

I2C

B

UART

C

SPI

D

CAN

11

What is the purpose of the 'shiftOut()' function in Arduino? / Arduino में 'shiftOut()' फ़ंक्शन का क्या उद्देश्य है?

A

To shift data into a shift register

B

To shift data out of a shift register

C

To read data from a sensor

D

To generate PWM signals

12

Which sensor is used to detect smoke and harmful gases? / धुआं और हानिकारक गैसों का पता लगाने के लिए किस सेंसर का उपयोग किया जाता है?

A

DHT11

B

LDR

C

MQ-135

D

Ultrasonic Sensor

13

What is the purpose of the 'EEPROM.write()' function in Arduino? / Arduino में 'EEPROM.write()' फ़ंक्शन का क्या उद्देश्य है?

A

To read data from EEPROM

B

To write data to EEPROM

C

To clear the EEPROM

D

To check the size of EEPROM

14

What is the baud rate used for in serial communication? / सीरियल संचार में बॉड रेट का क्या उपयोग किया जाता है?

A

To set the voltage level

B

To set the data transmission speed

C

To set the number of data bits

D

To set the parity bit

15

Which of the following is a microcontroller? / निम्नलिखित में से कौन सा माइक्रोकंट्रोलर है?

A

Raspberry Pi 4

B

Intel Core i7

C

ATmega328P

D

AMD Ryzen

16

What is the purpose of the 'LED_BUILTIN' constant in Arduino? / Arduino में 'LED_BUILTIN' कॉन्स्टेंट का क्या उद्देश्य है?

A

To define a custom LED pin

B

To refer to the built-in LED pin on the Arduino board

C

To turn off all LEDs

D

To set the LED brightness

17

What does the '!=' operator do in Embedded C? / एम्बेडेड C में '!=' ऑपरेटर क्या करता है?

A

Checks if two values are equal

B

Checks if two values are not equal

C

Assigns a value

D

Performs a logical NOT

18

What is the purpose of the 'while(1)' loop in embedded programming? / एम्बेडेड प्रोग्रामिंग में 'while(1)' लूप का क्या उद्देश्य है?

A

To run the code a fixed number of times

B

To create an infinite loop

C

To run the code once

D

To skip the loop

19

Which type of memory is volatile in a microcontroller? / माइक्रोकंट्रोलर में कौन सी मेमोरी वोलाटाइल होती है?

A

Flash Memory

B

EEPROM

C

RAM

D

ROM

20

What is the purpose of a pull-up resistor? / पुल-अप रेजिस्टर का क्या उद्देश्य है?

A

To pull the voltage to ground

B

To pull the voltage to VCC (high)

C

To increase current

D

To decrease voltage

21

What is the purpose of a pull-down resistor? / पुल-डाउन रेजिस्टर का क्या उद्देश्य है?

A

To pull the voltage to VCC

B

To pull the voltage to ground (GND)

C

To increase resistance

D

To decrease current

22

Which of the following is a wireless communication module for Arduino? / निम्नलिखित में से कौन सा Arduino के लिए वायरलेस संचार मॉड्यूल है?

A

HC-05

B

L293D

C

74HC595

D

DS3231

23

What is the purpose of the 'noInterrupts()' function in Arduino? / Arduino में 'noInterrupts()' फ़ंक्शन का क्या उद्देश्य है?

A

To enable all interrupts

B

To disable all interrupts

C

To attach an interrupt

D

To detach an interrupt

24

What is the purpose of the 'interrupts()' function in Arduino? / Arduino में 'interrupts()' फ़ंक्शन का क्या उद्देश्य है?

A

To disable all interrupts

B

To enable all interrupts

C

To attach an interrupt

D

To detach an interrupt

25

What is the standard voltage level for a HIGH digital signal on Arduino Uno? / Arduino Uno पर HIGH डिजिटल सिग्नल के लिए मानक वोल्टेज स्तर क्या है?

A

0V

B

3.3V

C

5V

D

12V

26

What is the standard voltage level for a LOW digital signal on Arduino Uno? / Arduino Uno पर LOW डिजिटल सिग्नल के लिए मानक वोल्टेज स्तर क्या है?

A

5V

B

3.3V

C

12V

D

0V

27

Which sensor is used to measure temperature and humidity together? / तापमान और आर्द्रता को एक साथ मापने के लिए किस सेंसर का उपयोग किया जाता है?

A

LDR

B

MQ-135

C

DHT11

D

Ultrasonic Sensor

28

What is the purpose of the 'tone()' function in Arduino? / Arduino में 'tone()' फ़ंक्शन का क्या उद्देश्य है?

A

To measure sound frequency

B

To generate a square wave of a specific frequency

C

To record audio

D

To play MP3 files

29

What is the purpose of the 'noTone()' function in Arduino? / Arduino में 'noTone()' फ़ंक्शन का क्या उद्देश्य है?

A

To start generating a tone

B

To stop generating a tone

C

To change the tone frequency

D

To measure the tone duration

30

What is the purpose of the 'Serial.available()' function? / 'Serial.available()' फ़ंक्शन का क्या उद्देश्य है?

A

To send data over serial

B

To check the number of bytes available to read

C

To close the serial connection

D

To set the baud rate

31

What is the purpose of the 'Serial.read()' function? / 'Serial.read()' फ़ंक्शन का क्या उद्देश्य है?

A

To send data over serial

B

To read one byte of incoming serial data

C

To check if data is available

D

To close the serial connection

32

What is the purpose of the 'Serial.write()' function? / 'Serial.write()' फ़ंक्शन का क्या उद्देश्य है?

A

To read data from serial

B

To write binary data to the serial port

C

To print text to the serial monitor

D

To check serial availability

33

What is the difference between 'Serial.print()' and 'Serial.write()'? / 'Serial.print()' और 'Serial.write()' के बीच क्या अंतर है?

A

print() sends raw binary data, write() sends ASCII text

B

print() sends ASCII text, write() sends raw binary data

C

Both send raw binary data

D

Both send ASCII text

34

Which pin on Arduino Uno is used for the TX (transmit) pin of serial communication? / Arduino Uno पर सीरियल संचार के TX (ट्रांसमिट) पिन के लिए किस पिन का उपयोग किया जाता है?

A

Pin 0

B

Pin 1

C

Pin 2

D

Pin 3

35

Which pin on Arduino Uno is used for the RX (receive) pin of serial communication? / Arduino Uno पर सीरियल संचार के RX (रिसीव) पिन के लिए किस पिन का उपयोग किया जाता है?

A

Pin 1

B

Pin 0

C

Pin 2

D

Pin 3

36

What is the maximum current that can be drawn from a single digital pin on Arduino Uno? / Arduino Uno पर एक डिजिटल पिन से अधिकतम कितनी करंट ली जा सकती है?

A

10 mA

B

20 mA

C

40 mA

D

100 mA

37

What is the maximum current that can be drawn from the 5V pin on Arduino Uno? / Arduino Uno पर 5V पिन से अधिकतम कितनी करंट ली जा सकती है?

A

100 mA

B

200 mA

C

400 mA

D

500 mA

38

What is the purpose of the 'delayMicroseconds()' function in Arduino? / Arduino में 'delayMicroseconds()' फ़ंक्शन का क्या उद्देश्य है?

A

To delay for milliseconds

B

To delay for microseconds

C

To delay for seconds

D

To delay for minutes

39

What is the maximum delay that can be achieved using 'delayMicroseconds()'? / 'delayMicroseconds()' का उपयोग करके अधिकतम कितनी देरी की जा सकती है?

A

16383 microseconds

B

65535 microseconds

C

16383 milliseconds

D

65535 milliseconds

40

What is a shift register used for? / शिफ्ट रजिस्टर का उपयोग किस लिए किया जाता है?

A

To increase the number of input pins

B

To increase the number of output pins

C

To store data permanently

D

To generate clock signals

41

Which shift register is commonly used to control multiple LEDs with few pins? / कम पिनों के साथ कई LEDs को नियंत्रित करने के लिए आमतौर पर किस शिफ्ट रजिस्टर का उपयोग किया जाता है?

A

74HC595

B

LM35

C

L293D

D

DS3231

42

What is the purpose of the 'bitSet()' function in Arduino? / Arduino में 'bitSet()' फ़ंक्शन का क्या उद्देश्य है?

A

To clear a specific bit in a variable

B

To set a specific bit to 1 in a variable

C

To read a specific bit

D

To toggle a specific bit

43

What is the purpose of the 'bitClear()' function in Arduino? / Arduino में 'bitClear()' फ़ंक्शन का क्या उद्देश्य है?

A

To set a specific bit to 1

B

To clear a specific bit to 0 in a variable

C

To read a specific bit

D

To toggle a specific bit

44

What is the purpose of the 'bitRead()' function in Arduino? / Arduino में 'bitRead()' फ़ंक्शन का क्या उद्देश्य है?

A

To set a bit

B

To clear a bit

C

To read a specific bit from a variable

D

To toggle a bit

45

What is the purpose of the 'bitWrite()' function in Arduino? / Arduino में 'bitWrite()' फ़ंक्शन का क्या उद्देश्य है?

A

To read a bit

B

To write a specific value to a bit in a variable

C

To clear all bits

D

To set all bits

46

What is the purpose of the 'lowByte()' function in Arduino? / Arduino में 'lowByte()' फ़ंक्शन का क्या उद्देश्य है?

A

To extract the low-order (least significant) byte from a variable

B

To extract the high-order (most significant) byte

C

To set the low byte

D

To clear the low byte

47

What is the purpose of the 'highByte()' function in Arduino? / Arduino में 'highByte()' फ़ंक्शन का क्या उद्देश्य है?

A

To extract the low-order byte

B

To extract the high-order (most significant) byte from a variable

C

To set the high byte

D

To clear the high byte

48

What is a stepper motor driver used for? / स्टेपर मोटर ड्राइवर का उपयोग किस लिए किया जाता है?

A

To measure the speed of the motor

B

To control the position and rotation of a stepper motor

C

To generate power for the motor

D

To sense motor temperature

49

Which stepper motor driver is commonly used with Arduino? / Arduino के साथ आमतौर पर किस स्टेपर मोटर ड्राइवर का उपयोग किया जाता है?

A

A4988

B

L293D

C

Both A and B

D

74HC595

50

What is the purpose of the 'Servo.h' library in Arduino? / Arduino में 'Servo.h' लाइब्रेरी का क्या उद्देश्य है?

A

To control DC motors

B

To control servo motors

C

To control stepper motors

D

To control LED brightness

51

What is the typical angle range of a standard servo motor? / एक मानक सर्वो मोटर की सामान्य कोण सीमा क्या है?

A

0 to 90 degrees

B

0 to 180 degrees

C

0 to 360 degrees

D

0 to 270 degrees

52

What is the purpose of the 'millis()' function in Arduino? / Arduino में 'millis()' फ़ंक्शन का क्या उद्देश्य है?

A

To delay program execution

B

To return the number of milliseconds since the board started

C

To measure microseconds

D

To reset the timer

53

What is the maximum value that millis() can return before it overflows? / मिलिस() ओवरफ्लो होने से पहले अधिकतम कितना मान लौटा सकता है?

A

About 50 days

B

About 50 hours

C

About 50 minutes

D

About 50 seconds

54

What is the purpose of the 'micros()' function in Arduino? / Arduino में 'micros()' फ़ंक्शन का क्या उद्देश्य है?

A

To return the number of milliseconds since the board started

B

To return the number of microseconds since the board started

C

To delay for microseconds

D

To delay for milliseconds

55

What is the resolution of micros() function on Arduino Uno? / Arduino Uno पर micros() फ़ंक्शन का रेजोल्यूशन क्या है?

A

1 microsecond

B

4 microseconds

C

8 microseconds

D

16 microseconds

56

What is the purpose of the 'yield()' function in Arduino? / Arduino में 'yield()' फ़ंक्शन का क्या उद्देश्य है?

A

To stop the program

B

To allow background tasks to run

C

To restart the program

D

To generate random numbers

57

What is the purpose of the 'restart' function in Arduino? (Not a standard function) / Arduino में 'restart' फ़ंक्शन का क्या उद्देश्य है? (मानक फ़ंक्शन नहीं है)

A

To reset the Arduino programmatically using the watchdog timer

B

To pause the program

C

To exit the program

D

To generate an interrupt

58

What is a digital signal? / डिजिटल सिग्नल क्या है?

A

A continuous signal with infinite values

B

A discrete signal with only two values (HIGH and LOW)

C

A signal that varies with temperature

D

A signal that is always HIGH

59

What is an analog signal? / एनालॉग सिग्नल क्या है?

A

A signal with only two values

B

A continuous signal that can have any value within a range

C

A signal that is always HIGH

D

A signal that is always LOW

60

What is the purpose of a transistor as a switch? / ट्रांजिस्टर का स्विच के रूप में क्या उद्देश्य है?

A

To amplify signals

B

To turn a load ON or OFF using a small control signal

C

To generate heat

D

To store charge

61

What is the purpose of a MOSFET in switching applications? / स्विचिंग अनुप्रयोगों में MOSFET का क्या उद्देश्य है?

A

To handle high currents with low power loss

B

To amplify small signals

C

To generate oscillations

D

To filter signals

62

What is an optocoupler used for? / ऑप्टोकपलर का उपयोग किस लिए किया जाता है?

A

To isolate two parts of a circuit using light

B

To amplify signals

C

To convert AC to DC

D

To generate light

63

What is the purpose of a relay module with optocoupler? / ऑप्टोकपलर के साथ रिले मॉड्यूल का क्या उद्देश्य है?

A

To provide electrical isolation between the microcontroller and the high-voltage circuit

B

To increase the current capacity

C

To decrease the voltage

D

To store energy

64

What is a solenoid? / सोलेनॉयड क्या है?

A

A type of sensor

B

An electromagnetic actuator that creates linear motion

C

A type of resistor

D

A type of capacitor

65

What is a piezoelectric buzzer? / पीज़ोइलेक्ट्रिक बजर क्या है?

A

A device that generates sound using piezoelectric effect

B

A device that measures pressure

C

A device that generates electricity from vibration

D

A device that measures temperature

66

What is the purpose of a PIR sensor? / PIR सेंसर का क्या उद्देश्य है?

A

To measure temperature

B

To detect motion by sensing infrared radiation

C

To measure light intensity

D

To measure humidity

67

What does PIR stand for? / PIR का पूर्ण रूप क्या है?

A

Passive Infrared

B

Power Infrared

C

Primary Infrared

D

Pulse Infrared

68

What is the typical detection range of a PIR sensor? / एक PIR सेंसर की सामान्य पहचान सीमा क्या है?

A

Up to 1 meter

B

Up to 5-7 meters

C

Up to 20 meters

D

Up to 50 meters

69

What is a reed switch? / रीड स्विच क्या है?

A

A magnetic sensor that closes contacts in the presence of a magnetic field

B

A temperature sensor

C

A humidity sensor

D

A pressure sensor

70

What is a hall effect sensor? / हॉल इफ़ेक्ट सेंसर क्या है?

A

A sensor that detects magnetic fields

B

A sensor that detects temperature

C

A sensor that detects humidity

D

A sensor that detects light

71

What is a load cell? / लोड सेल क्या है?

A

A sensor that measures weight or force

B

A sensor that measures temperature

C

A sensor that measures humidity

D

A sensor that measures light

72

What is a flex sensor? / फ्लेक्स सेंसर क्या है?

A

A sensor that measures bending or flexing

B

A sensor that measures temperature

C

A sensor that measures humidity

D

A sensor that measures light

73

What is the purpose of a real-time clock (RTC) module? / रीयल-टाइम क्लॉक (RTC) मॉड्यूल का क्या उद्देश्य है?

A

To keep accurate time even when the main device is powered off

B

To measure temperature

C

To measure humidity

D

To control motors

74

Which RTC module is commonly used with Arduino? / Arduino के साथ आमतौर पर किस RTC मॉड्यूल का उपयोग किया जाता है?

A

DS3231

B

DS1307

C

Both A and B

D

L293D

75

What is the purpose of an SD card module in Arduino? / Arduino में SD कार्ड मॉड्यूल का क्या उद्देश्य है?

A

To store large amounts of data persistently

B

To increase RAM

C

To increase processing speed

D

To connect to Wi-Fi

76

What is the purpose of a GPS module? / GPS मॉड्यूल का क्या उद्देश्य है?

A

To get geographic location coordinates

B

To measure altitude only

C

To measure speed only

D

To measure temperature

77

What does GSM stand for? / GSM का पूर्ण रूप क्या है?

A

Global System for Mobile Communications

B

General System for Mobile

C

Global Service for Mobile

D

General Service for Mobile

78

What is the purpose of a GSM module in IoT? / IoT में GSM मॉड्यूल का क्या उद्देश्य है?

A

To send SMS and make calls using cellular networks

B

To measure temperature

C

To measure humidity

D

To control LEDs

79

What is the purpose of a LoRa module? / LoRa मॉड्यूल का क्या उद्देश्य है?

A

For long-range, low-power wireless communication

B

For short-range high-speed communication

C

For Bluetooth communication

D

For Wi-Fi communication

80

What does LPWAN stand for? / LPWAN का पूर्ण रूप क्या है?

A

Low Power Wide Area Network

B

Long Power Wide Area Network

C

Low Power Wireless Area Network

D

Long Power Wireless Area Network

81

What is the purpose of an ESP8266 module? / ESP8266 मॉड्यूल का क्या उद्देश्य है?

A

To provide Wi-Fi connectivity to microcontrollers

B

To measure temperature

C

To control motors

D

To store data

82

What is the purpose of an ESP32 module? / ESP32 मॉड्यूल का क्या उद्देश्य है?

A

To provide both Wi-Fi and Bluetooth connectivity

B

To provide only Wi-Fi

C

To provide only Bluetooth

D

To measure temperature

83

What is the purpose of the 'WiFi.h' library in Arduino? / Arduino में 'WiFi.h' लाइब्रेरी का क्या उद्देश्य है?

A

To connect Arduino to Wi-Fi networks

B

To control Wi-Fi signal strength

C

To disable Wi-Fi

D

To measure Wi-Fi frequency

84

What is the purpose of the 'PubSubClient.h' library in Arduino? / Arduino में 'PubSubClient.h' लाइब्रेरी का क्या उद्देश्य है?

A

To implement MQTT protocol for IoT communication

B

To implement HTTP protocol

C

To implement CoAP protocol

D

To implement FTP protocol

85

What is MQTT broker? / MQTT ब्रोकर क्या है?

A

A server that manages MQTT communication between publishers and subscribers

B

A client device

C

A sensor

D

An actuator

86

What is the default port for MQTT protocol? / MQTT प्रोटोकॉल के लिए डिफ़ॉल्ट पोर्ट क्या है?

A

1883

B

8080

C

80

D

443

87

What is the purpose of an MQTT topic? / MQTT टॉपिक का क्या उद्देश्य है?

A

To identify the channel for publishing and subscribing messages

B

To set the baud rate

C

To configure the IP address

D

To set the port number

88

What is the purpose of the 'Blynk' platform in IoT? / IoT में 'Blynk' प्लेटफॉर्म का क्या उद्देश्य है?

A

To create mobile apps for IoT control and monitoring

B

To measure sensor data

C

To control motors

D

To store data

89

What is the purpose of the 'ThingSpeak' platform in IoT? / IoT में 'ThingSpeak' प्लेटफॉर्म का क्या उद्देश्य है?

A

To collect, store, and visualize IoT data in the cloud

B

To create mobile apps

C

To control motors

D

To generate random numbers

90

What is the purpose of the 'IFTTT' service in IoT? / IoT में 'IFTTT' सेवा का क्या उद्देश्य है?

A

To create conditional automations between different IoT services

B

To measure temperature

C

To control LEDs

D

To store data

91

What does IFTTT stand for? / IFTTT का पूर्ण रूप क्या है?

A

If This Then That

B

If That Then This

C

Internet For Things To Things

D

Integrated For Things To Things

92

What is the purpose of a ThingsBoard platform? / ThingsBoard प्लेटफॉर्म का क्या उद्देश्य है?

A

An open-source IoT platform for device management and visualization

B

A mobile app development platform

C

A sensor manufacturing company

D

A programming language

93

What is the purpose of an IoT dashboard? / IoT डैशबोर्ड का क्या उद्देश्य है?

A

To visualize and monitor IoT data in real-time

B

To write code for IoT devices

C

To debug IoT programs

D

To compile IoT code

94

What is edge computing in IoT? / IoT में एज कंप्यूटिंग क्या है?

A

Processing data near the source (at the edge) instead of in the cloud

B

Processing data only in the cloud

C

Storing data locally

D

Sending all data to the cloud

95

What is the benefit of edge computing in IoT? / IoT में एज कंप्यूटिंग का क्या लाभ है?

A

Reduced latency and bandwidth usage

B

Increased latency

C

Higher cost

D

More power consumption

96

What is firmware in the context of IoT devices? / IoT उपकरणों के संदर्भ में फ़र्मवेयर क्या है?

A

Software programmed into the hardware device

B

The physical hardware

C

The cloud server

D

The mobile app

97

What is OTA (Over-The-Air) update in IoT? / IoT में OTA (ओवर-द-एयर) अपडेट क्या है?

A

Updating device firmware wirelessly without physical connection

B

Updating using a USB cable

C

Updating using an SD card

D

Updating using a serial cable

98

What is the benefit of OTA updates? / OTA अपडेट का क्या लाभ है?

A

Convenient remote updates without physical access to devices

B

Faster updates only

C

Cheaper updates only

D

More secure updates only

99

What is the purpose of the 'SoftwareSerial' library in Arduino? / Arduino में 'SoftwareSerial' लाइब्रेरी का क्या उद्देश्य है?

A

To create additional serial ports on any digital pins

B

To improve the speed of hardware serial

C

To disable the hardware serial port

D

To convert analog signals to digital

100

What is the importance of active listening in communication? / संचार में सक्रिय श्रवण (Active Listening) का क्या महत्व है?

A

It helps in understanding the speaker's message completely before responding

B

It is only useful in formal meetings

C

It means staying silent throughout the conversation

D

It is less important than speaking skills