M4-R5.1 Model Paper — Set 2 — MCQ Quiz | Free O-Level Study Notes & MCQs

1

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

A

HyperText Transfer Protocol

B

High Transfer Text Protocol

C

Hyper Transfer Text Protocol

D

HighText Transfer Protocol

2

Which layer in the OSI model is responsible for routing? / OSI मॉडल में कौन सी परत रूटिंग के लिए जिम्मेदार होती है?

A

Network Layer

B

Physical Layer

C

Data Link Layer

D

Transport Layer

3

Which protocol is used for web browsing? / वेब ब्राउज़िंग के लिए किस प्रोटोकॉल का उपयोग किया जाता है?

A

HTTP/HTTPS

B

MQTT

C

CoAP

D

FTP

4

What is a constrained device in IoT? / IoT में कंस्ट्रेंड डिवाइस क्या है?

A

A device with limited memory, processing, and power

B

A very powerful computer

C

A device with unlimited resources

D

A device without any sensor

5

What is the range of Bluetooth typically? / ब्लूटूथ की सामान्य रेंज क्या है?

A

10 meters

B

100 meters

C

1 meter

D

1000 meters

6

What is Zigbee used for? / Zigbee का उपयोग किस लिए किया जाता है?

A

Low-power, low-data rate IoT applications

B

High-speed internet

C

Video streaming

D

Voice calls

7

What is LoRaWAN? / LoRaWAN क्या है?

A

A long-range, low-power wireless protocol for IoT

B

A short-range protocol

C

A wired protocol

D

A satellite protocol

8

What is the purpose of the physical layer in IoT? / IoT में फिजिकल लेयर का क्या उद्देश्य है?

A

To transmit raw bits over a medium

B

To route packets

C

To manage sessions

D

To encrypt data

9

What is the purpose of the transport layer? / ट्रांसपोर्ट लेयर का क्या उद्देश्य है?

A

To provide reliable data transfer

B

To transmit bits

C

To route packets

D

To display data

10

Which sensor is used to detect motion? / गति का पता लगाने के लिए किस सेंसर का उपयोग किया जाता है?

A

PIR Sensor

B

LDR

C

DHT11

D

MQ135

11

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

A

Passive Infrared

B

Power Infrared

C

Primary Infrared

D

Pulse Infrared

12

Which sensor is used to measure soil moisture? / मिट्टी की नमी मापने के लिए किस सेंसर का उपयोग किया जाता है?

A

Soil Moisture Sensor

B

DHT11

C

LDR

D

Ultrasonic Sensor

13

What is the purpose of a DC motor in IoT? / IoT में DC मोटर का क्या उद्देश्य है?

A

To provide rotational motion

B

To measure temperature

C

To detect light

D

To measure humidity

14

What is a servo motor? / सर्वो मोटर क्या है?

A

A motor that can be positioned at specific angles

B

A motor that runs continuously

C

A motor without control

D

A motor for AC only

15

What is the difference between a sensor and an actuator? / सेंसर और एक्चुएटर के बीच क्या अंतर है?

A

Sensors sense, actuators act

B

Sensors act, actuators sense

C

Both do the same thing

D

Both are not related

16

Which microcontroller is used in Arduino Uno? / Arduino Uno में किस माइक्रोकंट्रोलर का उपयोग किया जाता है?

A

ATmega328P

B

ESP8266

C

ESP32

D

Raspberry Pi

17

Which microcontroller has built-in Wi-Fi? / किस माइक्रोकंट्रोलर में बिल्ट-इन Wi-Fi होता है?

A

ESP8266

B

ATmega328P

C

ATmega2560

D

PIC16F877

18

What is the operating voltage of Arduino Uno? / Arduino Uno का ऑपरेटिंग वोल्टेज क्या है?

A

5V

B

3.3V

C

12V

D

9V

19

How many digital I/O pins does Arduino Uno have? / Arduino Uno में कितने डिजिटल I/O पिन होते हैं?

A

14

B

6

C

8

D

20

How many analog input pins does Arduino Uno have? / Arduino Uno में कितने एनालॉग इनपुट पिन होते हैं?

A

6

B

14

C

8

D

10

21

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

A

10-bit (0-1023)

B

8-bit (0-255)

C

12-bit (0-4095)

D

16-bit (0-65535)

22

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

A

To configure a pin as INPUT or OUTPUT

B

To read a pin value

C

To write a pin value

D

To delay execution

23

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

A

To set a digital pin to HIGH or LOW

B

To read a digital pin

C

To configure a pin

D

To delay execution

24

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

A

To output a PWM signal

B

To read analog value

C

To configure a pin

D

To delay execution

25

Which pins on Arduino support analogWrite() (PWM)? / Arduino पर कौन से पिन analogWrite() (PWM) सपोर्ट करते हैं?

A

Pins 3, 5, 6, 9, 10, 11

B

All digital pins

C

Only analog pins

D

Pins A0 to A5

26

What is the default baud rate for Serial communication in many Arduino examples? / कई Arduino उदाहरणों में सीरियल संचार के लिए डिफ़ॉल्ट बॉड रेट क्या है?

A

9600

B

4800

C

115200

D

19200

27

What does Serial.available() return? / Serial.available() क्या रिटर्न करता है?

A

Number of bytes available to read

B

The read byte

C

True if connected

D

The baud rate

28

What does Serial.read() return? / Serial.read() क्या रिटर्न करता है?

A

The next byte of incoming serial data

B

All available data

C

The baud rate

D

The pin status

29

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

A

Returns the number of milliseconds since the board started

B

Delays for milliseconds

C

Returns seconds

D

Returns microseconds

30

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

A

Returns the number of microseconds since the board started

B

Returns milliseconds

C

Delays for microseconds

D

Returns seconds

31

What is an interrupt in Arduino? / Arduino में इंटरप्ट क्या है?

A

A signal that temporarily pauses the main program to execute a special function

B

A type of loop

C

A variable

D

A sensor

32

Which function is used to attach an interrupt? / इंटरप्ट को अटैच करने के लिए किस फ़ंक्शन का उपयोग किया जाता है?

A

attachInterrupt()

B

setInterrupt()

C

enableInterrupt()

D

interruptOn()

33

What is EEPROM in Arduino? / Arduino में EEPROM क्या है?

A

Non-volatile memory that retains data after power-off

B

Volatile memory

C

Program memory

D

Cache memory

34

What is the size of EEPROM in Arduino Uno? / Arduino Uno में EEPROM का आकार क्या है?

A

1 KB

B

512 bytes

C

2 KB

D

4 KB

35

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

A

To generate a square wave of a specified frequency

B

To measure sound

C

To record audio

D

To play music files

36

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

A

To stop the tone generated by tone()

B

To start a tone

C

To change frequency

D

To measure noise

37

What is a shift register? / शिफ्ट रजिस्टर क्या है?

A

A device that converts serial data to parallel or vice versa

B

A type of sensor

C

A motor driver

D

A power supply

38

Which shift register is commonly used with Arduino? / Arduino के साथ आमतौर पर किस शिफ्ट रजिस्टर का उपयोग किया जाता है?

A

74HC595

B

LM35

C

DHT11

D

L293D

39

What is a stepper motor? / स्टेपर मोटर क्या है?

A

A motor that moves in discrete steps

B

A motor that runs continuously

C

A motor without control

D

A motor for AC only

40

What is the purpose of an H-bridge? / एच-ब्रिज का क्या उद्देश्य है?

A

To control the direction of a DC motor

B

To measure temperature

C

To detect light

D

To communicate wirelessly

41

Which IC is commonly used as an H-bridge? / एच-ब्रिज के रूप में आमतौर पर किस IC का उपयोग किया जाता है?

A

L293D

B

LM35

C

74HC595

D

ATmega328P

42

What is a real-time clock (RTC) module? / रीयल-टाइम क्लॉक (RTC) मॉड्यूल क्या है?

A

A module that keeps track of time even when power is off

B

A timer

C

A stopwatch

D

A delay function

43

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

A

DS3231

B

DHT11

C

HC-05

D

LDR

44

What is an SD card module used for in Arduino? / Arduino में SD कार्ड मॉड्यूल का उपयोग किस लिए किया जाता है?

A

To store data persistently

B

To measure temperature

C

To control motors

D

To communicate wirelessly

45

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

A

To get location coordinates

B

To measure temperature

C

To detect gas

D

To control devices

46

What is a camera module used for in IoT? / IoT में कैमरा मॉड्यूल का उपयोग किस लिए किया जाता है?

A

To capture images and video

B

To measure light

C

To detect motion

D

To measure distance

47

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

A

To re-map a number from one range to another

B

To create a map of the area

C

To draw a map

D

To store coordinates

48

What is the output of map(50, 0, 100, 0, 255)? / map(50, 0, 100, 0, 255) का आउटपुट क्या है?

A

127.5

B

128

C

127

D

255

49

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

A

To constrain a number to be within a range

B

To create a constant

C

To limit the loop

D

To restrict memory

50

What is the output of constrain(150, 0, 100)? / constrain(150, 0, 100) का आउटपुट क्या है?

A

100

B

150

C

0

D

50

51

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

A

To return the absolute value of a number

B

To return the square root

C

To return the power

D

To return the remainder

52

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

A

To calculate the power of a number

B

To calculate square root

C

To calculate logarithm

D

To calculate exponent

53

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

A

To calculate the square root of a number

B

To calculate power

C

To calculate absolute value

D

To calculate remainder

54

What is a breadboard? / ब्रेडबोर्ड क्या है?

A

A board for prototyping circuits without soldering

B

A type of microcontroller

C

A sensor

D

A power supply

55

What is a resistor used for? / रेजिस्टर का उपयोग किस लिए किया जाता है?

A

To limit current in a circuit

B

To increase voltage

C

To store energy

D

To amplify signals

56

What is a capacitor used for? / कैपेसिटर का उपयोग किस लिए किया जाता है?

A

To store electrical energy

B

To limit current

C

To amplify signals

D

To generate heat

57

What is a diode used for? / डायोड का उपयोग किस लिए किया जाता है?

A

To allow current to flow in only one direction

B

To store energy

C

To amplify signals

D

To limit current

58

What is a transistor used for? / ट्रांजिस्टर का उपयोग किस लिए किया जाता है?

A

To amplify or switch electronic signals

B

To store energy

C

To limit current

D

To generate light

59

What is a potentiometer? / पोटेंशियोमीटर क्या है?

A

A variable resistor used to adjust voltage

B

A fixed resistor

C

A capacitor

D

A diode

60

What is the purpose of a buzzer in IoT? / IoT में बजर का क्या उद्देश्य है?

A

To produce sound as an alert or notification

B

To measure sound

C

To record audio

D

To amplify sound

61

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

A

To detect vibrations or movement

B

To measure temperature

C

To measure humidity

D

To detect gas

62

What is a flow sensor used for? / फ्लो सेंसर का उपयोग किस लिए किया जाता है?

A

To measure the flow rate of liquid or gas

B

To measure temperature

C

To measure pressure

D

To measure humidity

63

What is a pressure sensor used for? / प्रेशर सेंसर का उपयोग किस लिए किया जाता है?

A

To measure pressure of gases or liquids

B

To measure temperature

C

To measure humidity

D

To measure light

64

What is a touch sensor? / टच सेंसर क्या है?

A

A sensor that detects physical touch

B

A sensor that measures temperature

C

A sensor that measures light

D

A sensor that measures sound

65

What is a color sensor used for? / कलर सेंसर का उपयोग किस लिए किया जाता है?

A

To detect and identify colors

B

To measure temperature

C

To measure distance

D

To measure humidity

66

What is a barometric pressure sensor? / बैरोमीट्रिक प्रेशर सेंसर क्या है?

A

A sensor that measures atmospheric pressure

B

A sensor that measures temperature

C

A sensor that measures humidity

D

A sensor that measures light

67

What is a heart rate sensor? / हार्ट रेट सेंसर क्या है?

A

A sensor that measures heartbeats per minute

B

A sensor that measures blood pressure

C

A sensor that measures temperature

D

A sensor that measures oxygen level

68

What is an accelerometer used for? / एक्सेलेरोमीटर का उपयोग किस लिए किया जाता है?

A

To measure acceleration forces

B

To measure temperature

C

To measure humidity

D

To measure distance

69

What is a gyroscope used for? / जाइरोस्कोप का उपयोग किस लिए किया जाता है?

A

To measure orientation and angular velocity

B

To measure temperature

C

To measure humidity

D

To measure distance

70

What is a magnetometer used for? / मैग्नेटोमीटर का उपयोग किस लिए किया जाता है?

A

To measure magnetic fields

B

To measure temperature

C

To measure humidity

D

To measure distance

71

What is an IMU sensor? / IMU सेंसर क्या है?

A

Inertial Measurement Unit - combines accelerometer and gyroscope

B

Infrared Measurement Unit

C

Integrated Motor Unit

D

Input Management Unit

72

What is the purpose of a relay in IoT? / IoT में रिले का क्या उद्देश्य है?

A

To control high-voltage devices using low-voltage signals

B

To measure voltage

C

To measure current

D

To store energy

73

What is the difference between normally open (NO) and normally closed (NC) relay contacts? / सामान्य रूप से खुले (NO) और सामान्य रूप से बंद (NC) रिले संपर्कों के बीच क्या अंतर है?

A

NO is open when relay is off, NC is closed when relay is off

B

NO is closed when relay is off, NC is open when relay is off

C

Both are the same

D

Neither works

74

What is the purpose of an optocoupler? / ऑप्टोकपलर का क्या उद्देश्य है?

A

To isolate electrical circuits using light

B

To amplify signals

C

To store energy

D

To measure light

75

What is a MOSFET? / MOSFET क्या है?

A

A type of transistor used for switching and amplification

B

A type of sensor

C

A type of microcontroller

D

A type of resistor

76

What is the purpose of a voltage regulator? / वोल्टेज रेगुलेटर का क्या उद्देश्य है?

A

To maintain a constant voltage level

B

To increase voltage

C

To decrease voltage

D

To store voltage

77

What is a buck converter? / बक कनवर्टर क्या है?

A

A DC-DC converter that steps down voltage

B

A DC-DC converter that steps up voltage

C

An AC-DC converter

D

A DC-AC converter

78

What is a boost converter? / बूस्ट कनवर्टर क्या है?

A

A DC-DC converter that steps up voltage

B

A DC-DC converter that steps down voltage

C

An AC-DC converter

D

A DC-AC converter

79

What is the purpose of a fuse? / फ्यूज का क्या उद्देश्य है?

A

To protect circuits from overcurrent

B

To increase current

C

To store energy

D

To measure current

80

What is a circuit breaker? / सर्किट ब्रेकर क्या है?

A

A resettable device that protects circuits from overcurrent

B

A one-time use fuse

C

A switch

D

A resistor

81

What is the purpose of grounding in a circuit? / सर्किट में ग्राउंडिंग का क्या उद्देश्य है?

A

To provide a reference voltage and safety path for current

B

To increase voltage

C

To store energy

D

To measure current

82

What is the difference between AC and DC? / AC और DC के बीच क्या अंतर है?

A

AC alternates direction, DC flows in one direction

B

DC alternates direction, AC flows in one direction

C

Both are the same

D

AC is always high voltage

83

What is the standard voltage for household AC in India? / भारत में घरेलू AC के लिए मानक वोल्टेज क्या है?

A

230V, 50Hz

B

110V, 60Hz

C

230V, 60Hz

D

110V, 50Hz

84

What is the purpose of a transformer? / ट्रांसफार्मर का क्या उद्देश्य है?

A

To change voltage levels in AC circuits

B

To change AC to DC

C

To change DC to AC

D

To store energy

85

What is a rectifier used for? / रेक्टिफायर का उपयोग किस लिए किया जाता है?

A

To convert AC to DC

B

To convert DC to AC

C

To change voltage levels

D

To store energy

86

What is an inverter used for? / इनवर्टर का उपयोग किस लिए किया जाता है?

A

To convert DC to AC

B

To convert AC to DC

C

To change voltage levels

D

To store energy

87

What is a battery? / बैटरी क्या है?

A

A device that stores chemical energy and converts it to electrical energy

B

A device that generates AC

C

A device that measures current

D

A device that limits current

88

What is the difference between a lithium-ion and a lead-acid battery? / लिथियम-आयन और लेड-एसिड बैटरी के बीच क्या अंतर है?

A

Li-ion is lighter and rechargeable, lead-acid is heavier

B

Lead-acid is lighter and rechargeable

C

Both are the same

D

Li-ion is not rechargeable

89

What is a solar panel? / सोलर पैनल क्या है?

A

A device that converts sunlight into electricity

B

A device that stores energy

C

A device that measures light

D

A device that generates heat

90

What is the purpose of a charge controller in a solar system? / सोलर सिस्टम में चार्ज कंट्रोलर का क्या उद्देश्य है?

A

To regulate battery charging from solar panels

B

To convert DC to AC

C

To store energy

D

To measure sunlight

91

What is a PWM charge controller? / PWM चार्ज कंट्रोलर क्या है?

A

Pulse Width Modulation charge controller for batteries

B

Power Width Modulation controller

C

Pulse Wave Modulation controller

D

Power Wave Modulation controller

92

What is an MPPT charge controller? / MPPT चार्ज कंट्रोलर क्या है?

A

Maximum Power Point Tracking charge controller

B

Minimum Power Point Tracking controller

C

Maximum Power Transfer controller

D

Minimum Power Transfer controller

93

What is the purpose of a heat sink? / हीट सिंक का क्या उद्देश्य है?

A

To dissipate heat from electronic components

B

To generate heat

C

To store heat

D

To measure temperature

94

What is a thermistor? / थर्मिस्टर क्या है?

A

A temperature-sensitive resistor

B

A light-sensitive resistor

C

A pressure-sensitive resistor

D

A humidity-sensitive resistor

95

What is the difference between PTC and NTC thermistors? / PTC और NTC थर्मिस्टर्स के बीच क्या अंतर है?

A

PTC resistance increases with temperature, NTC decreases

B

PTC decreases with temperature, NTC increases

C

Both increase with temperature

D

Both decrease with temperature

96

What is the purpose of the 'strcmp()' function in Embedded C? / एम्बेडेड C में 'strcmp()' फ़ंक्शन का क्या उद्देश्य है?

A

To compare two strings

B

To copy one string to another

C

To find the length of a string

D

To concatenate two strings

97

What is the purpose of a watchdog timer in Arduino? / Arduino में वॉचडॉग टाइमर का क्या उद्देश्य है?

A

To reset the microcontroller if the program freezes

B

To measure time accurately

C

To generate PWM signals

D

To read analog sensors

98

What is the function of the 'digitalPinToInterrupt()' macro in Arduino? / Arduino में 'digitalPinToInterrupt()' मैक्रो का क्या कार्य है?

A

To convert a digital pin number to its corresponding interrupt number

B

To read the value of a digital pin

C

To write a value to a digital pin

D

To configure a pin as input

99

What is the ideal body language during an interview? / साक्षात्कार के दौरान आदर्श बॉडी लैंग्वेज क्या होनी चाहिए?

A

Sit straight, make eye contact, and avoid fidgeting

B

Slouch in the chair and look at the floor

C

Cross your arms and avoid eye contact

D

Keep your phone on the table and check it frequently

100

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

A

println() adds a newline after the text, print() does not

B

print() adds a newline, println() does not

C

Both are exactly the same

D

print() works only for numbers, println() works for text