M4-R5.1 Model Paper — Set 6 — MCQ Quiz | Free O-Level Study Notes & MCQs

1

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

A

Simple Mail Transfer Protocol

B

Simple Message Transfer Protocol

C

Simple Mail Transmission Protocol

D

Secure Mail Transfer Protocol

2

Which protocol is used for sending emails? / ईमेल भेजने के लिए किस प्रोटोकॉल का उपयोग किया जाता है?

A

POP3

B

IMAP

C

SMTP

D

FTP

3

What is the purpose of the 'analogReference()' function with DEFAULT parameter? / DEFAULT पैरामीटर के साथ 'analogReference()' फ़ंक्शन का क्या उद्देश्य है?

A

To use internal 1.1V reference

B

To use external reference on AREF pin

C

To use the default 5V reference

D

To disable ADC reference

4

Which sensor is used to measure the angle of tilt? / झुकाव का कोण मापने के लिए किस सेंसर का उपयोग किया जाता है?

A

Tilt Sensor

B

Accelerometer

C

Gyroscope

D

All of the above

5

What is the output of analogWrite(127) on a PWM pin? / PWM पिन पर analogWrite(127) का आउटपुट क्या है?

A

0V

B

About 2.5V (50% duty cycle)

C

5V

D

About 1.25V

6

What is the purpose of the 'noTone()' function without any parameter in Arduino? / Arduino में बिना किसी पैरामीटर के 'noTone()' फ़ंक्शन का क्या उद्देश्य है?

A

It stops tone on all pins

B

It is not valid; noTone() requires a pin parameter

C

It stops tone on pin 13 only

D

It restarts the tone

7

Which of the following is an example of an actuator that produces linear motion? / निम्नलिखित में से कौन सा एक्चुएटर रैखिक गति उत्पन्न करता है?

A

DC Motor

B

Servo Motor

C

Solenoid

D

Stepper Motor

8

What does the 'random(10, 20)' function return in Arduino? / Arduino में 'random(10, 20)' फ़ंक्शन क्या रिटर्न करता है?

A

A random number between 10 and 19

B

A random number between 10 and 20

C

A random number between 10 and 21

D

A random number between 11 and 20

9

What is the purpose of a zener diode? / जेनर डायोड का क्या उद्देश्य है?

A

To regulate voltage

B

To amplify signals

C

To store charge

D

To limit current

10

Which communication protocol uses a single data line and is commonly used for DS18B20 sensor? / कौन सा संचार प्रोटोकॉल एकल डेटा लाइन का उपयोग करता है और आमतौर पर DS18B20 सेंसर के लिए उपयोग किया जाता है?

A

I2C

B

SPI

C

OneWire

D

UART

11

What is the purpose of the 'bitSet()' function when used on a variable? / वेरिएबल पर 'bitSet()' फ़ंक्शन का उपयोग करने का क्या उद्देश्य है?

A

To clear a specific bit

B

To set a specific bit to 1

C

To read a specific bit

D

To toggle a specific bit

12

Which gas does the MQ-135 sensor detect? / MQ-135 सेंसर किस गैस का पता लगाता है?

A

LPG

B

Carbon Monoxide (CO)

C

Methane

D

Ammonia, Benzene, Smoke, CO2

13

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

A

It writes only if the value is different, saving write cycles

B

It always writes regardless of value

C

It reads the value from EEPROM

D

It clears the EEPROM

14

What is the typical baud rate for GPS modules? / GPS मॉड्यूल के लिए विशिष्ट बॉड रेट क्या है?

A

4800

B

9600

C

115200

D

38400

15

Which of the following is a development board based on ESP8266? / निम्नलिखित में से कौन सा ESP8266 पर आधारित डेवलपमेंट बोर्ड है?

A

NodeMCU

B

Arduino Uno

C

Raspberry Pi Pico

D

STM32F4 Discovery

16

What is the purpose of the 'digitalPinToInterrupt()' macro? / 'digitalPinToInterrupt()' मैक्रो का क्या उद्देश्य है?

A

To convert a digital pin number to its corresponding interrupt number

B

To attach an interrupt to a pin

C

To detach an interrupt from a pin

D

To enable all interrupts

17

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

A

Logical AND

B

Logical OR

C

Bitwise OR

D

Bitwise AND

18

What is the purpose of the 'switch-case' statement in C? / C में 'switch-case' स्टेटमेंट का क्या उद्देश्य है?

A

To select one of many code blocks based on a variable value

B

To create a loop

C

To declare variables

D

To define functions

19

Which type of memory is used to store user data that persists after power-off in Arduino? / Arduino में पॉवर बंद करने के बाद भी उपयोगकर्ता डेटा संग्रहीत करने के लिए किस प्रकार की मेमोरी का उपयोग किया जाता है?

A

RAM

B

Flash Memory

C

EEPROM

D

Cache Memory

20

What is the purpose of the 'INPUT_PULLDOWN' mode in Arduino? Is it available? / Arduino में 'INPUT_PULLDOWN' मोड का क्या उद्देश्य है? क्या यह उपलब्ध है?

A

It is available on all Arduino boards

B

It is not available on standard Arduino Uno; only on some boards like ESP32

C

It is the same as INPUT_PULLUP

D

It disables the pin

21

How do you disable the internal pull-up resistor on an Arduino pin? / Arduino पिन पर आंतरिक पुल-अप रेजिस्टर को कैसे निष्क्रिय करते हैं?

A

pinMode(pin, INPUT)

B

pinMode(pin, OUTPUT)

C

digitalWrite(pin, LOW)

D

digitalWrite(pin, HIGH)

22

Which of the following is a Wi-Fi module? / निम्नलिखित में से कौन सा Wi-Fi मॉड्यूल है?

A

HC-05

B

HC-06

C

ESP8266

D

HM-10

23

What is the purpose of the 'ISR' (Interrupt Service Routine) in Arduino? / Arduino में 'ISR' (Interrupt Service Routine) का क्या उद्देश्य है?

A

To handle interrupts when they occur

B

To disable interrupts

C

To enable interrupts

D

To attach interrupts

24

What is the purpose of the 'delayMicroseconds()' function's limitation? / 'delayMicroseconds()' फ़ंक्शन की सीमा का क्या उद्देश्य है?

A

It can only delay up to 16383 microseconds

B

It can delay any number of microseconds

C

It can only delay up to 65535 microseconds

D

It cannot be used with interrupts

25

What is the standard voltage level for a HIGH digital signal on 5V logic devices? / 5V लॉजिक डिवाइस पर HIGH डिजिटल सिग्नल के लिए मानक वोल्टेज स्तर क्या है?

A

3.3V

B

5V

C

1.8V

D

12V

26

What is the standard voltage level for a LOW digital signal on 3.3V logic devices? / 3.3V लॉजिक डिवाइस पर LOW डिजिटल सिग्नल के लिए मानक वोल्टेज स्तर क्या है?

A

5V

B

3.3V

C

0V (GND)

D

1.65V

27

Which sensor is used to measure methane and LPG gas? / मीथेन और LPG गैस मापने के लिए किस सेंसर का उपयोग किया जाता है?

A

MQ-5

B

MQ-7

C

MQ-135

D

DHT11

28

What is the purpose of the 'malloc()' function in C for Arduino? / Arduino के लिए C में 'malloc()' फ़ंक्शन का क्या उद्देश्य है?

A

To allocate dynamic memory on the heap

B

To free dynamic memory

C

To create a new function

D

To create a new array

29

What is the purpose of the 'free()' function in C for Arduino? / Arduino के लिए C में 'free()' फ़ंक्शन का क्या उद्देश्य है?

A

To allocate dynamic memory

B

To free (deallocate) dynamic memory

C

To free a variable

D

To free a function

30

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

A

To read the next byte without removing it from the buffer

B

To read and remove the next byte

C

To clear the serial buffer

D

To send data over serial

31

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

A

To find a specific string in the serial buffer

B

To find a specific byte in serial buffer

C

To replace a string in serial buffer

D

To delete a string from serial buffer

32

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

A

To find a string until a termination string is found

B

To find a string indefinitely

C

To replace a string

D

To delete a string

33

Which Arduino pin is connected to the built-in LED on Arduino Leonardo? / Arduino Leonardo पर बिल्ट-इन LED किस पिन से जुड़ी होती है?

A

Pin 13

B

Pin 12

C

Pin 11

D

Pin 10

34

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

A

400 mA

B

800 mA

C

1 A

D

2 A

35

What is the purpose of the 'micros()' overflow? / 'micros()' ओवरफ्लो का क्या उद्देश्य है?

A

It overflows after about 71 minutes

B

It overflows after about 70 seconds

C

It overflows after about 70 hours

D

It never overflows

36

What is a dot matrix display? / डॉट मैट्रिक्स डिस्प्ले क्या है?

A

A display that uses a grid of LEDs to show characters and graphics

B

A display that shows only digits

C

An LCD display

D

An OLED display

37

What is the typical size of a common dot matrix display? / एक सामान्य डॉट मैट्रिक्स डिस्प्ले का विशिष्ट आकार क्या है?

A

8x8

B

16x16

C

5x7

D

All of the above

38

What is the purpose of the 'MAX7219' IC? / 'MAX7219' IC का क्या उद्देश्य है?

A

To drive 7-segment displays and dot matrix displays

B

To measure temperature

C

To control motors

D

To store data

39

How many 7-segment displays can a single MAX7219 drive? / एक MAX7219 कितने 7-सेगमेंट डिस्प्ले को ड्राइव कर सकता है?

A

4

B

8

C

16

D

2

40

What is the purpose of the 'LedControl' library? / 'LedControl' लाइब्रेरी का क्या उद्देश्य है?

A

To control MAX7219-based LED matrices and 7-segment displays

B

To control single LEDs

C

To control RGB LEDs

D

To control LED strips

41

What is the purpose of a joystick's SW pin? / जॉयस्टिक के SW पिन का क्या उद्देश्य है?

A

It is the select button (push the joystick down)

B

It is the X-axis output

C

It is the Y-axis output

D

It is the power pin

42

What is a membrane keypad? / मेम्ब्रेन कीपैड क्या है?

A

A thin, flexible keypad commonly used in calculators and phones

B

A mechanical keypad

C

A capacitive touch keypad

D

A wireless keypad

43

What is the typical matrix size of a common membrane keypad? / एक सामान्य मेम्ब्रेन कीपैड का विशिष्ट मैट्रिक्स आकार क्या है?

A

4x4

B

3x4

C

4x3

D

All of the above

44

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

A

To read key presses from a matrix keypad

B

To display characters on keypad

C

To control backlight of keypad

D

To connect keypad wirelessly

45

What is the purpose of a buzzer module with a driver circuit? / ड्राइवर सर्किट के साथ बजर मॉड्यूल का क्या उद्देश्य है?

A

To produce louder sound and protect the microcontroller pin

B

To measure sound

C

To record audio

D

To amplify microphone signals

46

What is the difference between an active and a passive buzzer? / सक्रिय (Active) और निष्क्रिय (Passive) बजर के बीच क्या अंतर है?

A

Active buzzer has internal oscillator, passive requires external frequency

B

Passive buzzer has internal oscillator, active requires external frequency

C

Both are the same

D

Active is quieter than passive

47

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

A

To protect the microcontroller from high voltage spikes

B

To increase relay switching speed

C

To reduce power consumption

D

To increase current capacity

48

What is the purpose of a solid state relay (SSR)? / सॉलिड स्टेट रिले (SSR) का क्या उद्देश्य है?

A

A relay with no moving parts, using semiconductors for switching

B

A relay with mechanical contacts

C

A relay for low voltage only

D

A relay for DC only

49

What is the advantage of a solid state relay over an electromagnetic relay? / इलेक्ट्रोमैग्नेटिक रिले की तुलना में सॉलिड स्टेट रिले का क्या लाभ है?

A

Faster switching, no contact wear, and silent operation

B

Lower cost

C

Higher current capacity

D

Easier to troubleshoot

50

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

A

A semiconductor device for controlling AC power

B

A device for controlling DC power

C

A sensor

D

A capacitor

51

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

A

A bidirectional trigger diode often used with TRIACs

B

A unidirectional diode

C

A transistor

D

A capacitor

52

What is the purpose of a photoresistor (LDR)? / फोटोरेसिस्टर (LDR) का क्या उद्देश्य है?

A

To measure light intensity

B

To measure temperature

C

To measure humidity

D

To measure distance

53

What is the purpose of a photodiode? / फोटोडायोड का क्या उद्देश्य है?

A

To convert light into current or voltage

B

To generate light

C

To measure temperature

D

To store energy

54

What is the purpose of a phototransistor? / फोटोट्रांजिस्टर का क्या उद्देश्य है?

A

A transistor that responds to light

B

A normal transistor

C

A light emitter

D

A temperature sensor

55

What is the purpose of an optoisolator? / ऑप्टोआइसोलेटर का क्या उद्देश्य है?

A

To transfer signals between circuits using light for isolation

B

To amplify signals

C

To filter signals

D

To convert AC to DC

56

What is the purpose of a thermocouple? / थर्मोकपल का क्या उद्देश्य है?

A

To measure high temperatures using two dissimilar metals

B

To measure humidity

C

To measure pressure

D

To measure light

57

What is the typical temperature range of a K-type thermocouple? / K-टाइप थर्मोकपल की विशिष्ट तापमान सीमा क्या है?

A

-200°C to +1350°C

B

0°C to 100°C

C

-50°C to +150°C

D

-270°C to +400°C

58

What is the purpose of a MAX6675 IC? / MAX6675 IC का क्या उद्देश्य है?

A

To interface a K-type thermocouple with a microcontroller

B

To measure humidity

C

To control motors

D

To drive displays

59

What is the purpose of the 'MAX6675.h' library in Arduino? / Arduino में 'MAX6675.h' लाइब्रेरी का क्या उद्देश्य है?

A

To read temperature from a K-type thermocouple via MAX6675

B

To control LED matrices

C

To communicate via Bluetooth

D

To control servo motors

60

What is the purpose of a vibration motor? / वाइब्रेशन मोटर का क्या उद्देश्य है?

A

To create vibrations for haptic feedback

B

To measure vibration

C

To generate sound

D

To produce light

61

What is the purpose of a linear actuator? / लीनियर एक्चुएटर का क्या उद्देश्य है?

A

To create linear (straight line) motion

B

To create rotational motion

C

To measure linear position

D

To generate electricity

62

What is the purpose of a servo motor's feedback mechanism? / सर्वो मोटर के फीडबैक तंत्र का क्या उद्देश्य है?

A

To report the current position back to the controller

B

To increase motor speed

C

To reduce power consumption

D

To generate heat

63

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

A

To read rotary encoder position and direction

B

To control motors

C

To measure temperature

D

To drive displays

64

What is the purpose of a quadrature encoder? / क्वाड्रेचर एनकोडर का क्या उद्देश्य है?

A

To provide position and direction information using two output signals

B

To measure temperature

C

To measure humidity

D

To measure pressure

65

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

A

To write any data type (struct, float, int) to EEPROM

B

To write only bytes to EEPROM

C

To read from EEPROM

D

To clear EEPROM

66

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

A

To read any data type (struct, float, int) from EEPROM

B

To write to EEPROM

C

To clear EEPROM

D

To update EEPROM

67

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

A

To create text animations on LED matrix displays

B

To control servo motors

C

To read sensors

D

To communicate via Wi-Fi

68

What is the purpose of the 'MD_MAX72xx.h' library in Arduino? / Arduino में 'MD_MAX72xx.h' लाइब्रेरी का क्या उद्देश्य है?

A

To control MAX72xx-based LED matrix displays

B

To control LCD displays

C

To control OLED displays

D

To control 7-segment displays

69

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

A

To use the built-in RTC of SAMD21 boards (Arduino Zero, MKR)

B

To use external RTC modules

C

To measure temperature

D

To control displays

70

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

A

To use timer interrupts on Arduino Due

B

To delay program execution

C

To measure time

D

To control PWM

71

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

A

To use Timer1 on Arduino Uno for periodic interrupts

B

To delay program execution

C

To measure microseconds

D

To control PWM

72

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

A

To use Timer3 on Arduino Mega for periodic interrupts

B

To delay program execution

C

To measure time

D

To control LEDs

73

What is the purpose of the 'MsTimer2.h' library in Arduino? / Arduino में 'MsTimer2.h' लाइब्रेरी का क्या उद्देश्य है?

A

To create timer interrupts every millisecond using Timer2

B

To delay for milliseconds

C

To measure microseconds

D

To control PWM

74

What is the purpose of the 'FlexiTimer2.h' library in Arduino? / Arduino में 'FlexiTimer2.h' लाइब्रेरी का क्या उद्देश्य है?

A

A flexible timer library with configurable intervals

B

A fixed timer library

C

A delay library

D

A PWM library

75

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

A

To create non-blocking timers using millis()

B

To create blocking delays

C

To measure time accurately

D

To generate PWM

76

What is the purpose of the 'Bounce2.h' library in Arduino? / Arduino में 'Bounce2.h' लाइब्रेरी का क्या उद्देश्य है?

A

To debounce button presses

B

To bounce signals

C

To measure time

D

To control LEDs

77

What is the purpose of a debounce library? / डिबाउंस लाइब्रेरी का क्या उद्देश्य है?

A

To filter out false triggering from mechanical switch bounce

B

To increase button sensitivity

C

To decrease button sensitivity

D

To change button polarity

78

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

A

To implement First-In-First-Out queue data structure

B

To implement stack data structure

C

To sort data

D

To search data

79

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

A

To implement a linked list data structure

B

To implement an array

C

To sort data

D

To search data

80

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

A

To provide string manipulation functions (char arrays)

B

To use Arduino String object

C

To convert numbers to strings

D

To parse strings

81

What is the difference between Arduino String and char array? / Arduino String और char array के बीच क्या अंतर है?

A

String is easier but uses more memory; char array is efficient but requires manual management

B

String uses less memory

C

Char array is easier to use

D

Both are exactly the same

82

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

A

To format strings into a char buffer

B

To print to serial monitor

C

To read from serial monitor

D

To compare strings

83

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

A

To convert a double/float to a string

B

To convert a string to double

C

To convert integer to string

D

To compare floats

84

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

A

To convert an integer to a string

B

To convert a string to integer

C

To convert float to integer

D

To compare integers

85

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

A

To convert a string to an integer

B

To convert an integer to string

C

To convert float to integer

D

To compare strings

86

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

A

To convert a string to a float/double

B

To convert float to string

C

To convert integer to float

D

To compare floats

87

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

A

To check if a character is an alphabet (A-Z or a-z)

B

To check if a character is a digit

C

To check if a character is alphanumeric

D

To check if a character is uppercase

88

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

A

To check if a character is a digit (0-9)

B

To check if a character is an alphabet

C

To check if a character is alphanumeric

D

To check if a character is lowercase

89

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

A

To check if a character is alphanumeric (A-Z, a-z, 0-9)

B

To check if a character is an alphabet only

C

To check if a character is a digit only

D

To check if a character is uppercase

90

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

A

To check if a character is a whitespace (space, tab, newline)

B

To check if a character is a space only

C

To check if a character is a letter

D

To check if a character is a digit

91

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

A

To check if a character is a punctuation mark

B

To check if a character is a letter

C

To check if a character is a digit

D

To check if a character is whitespace

92

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

A

To check if a character is printable

B

To print a character

C

To read a character

D

To store a character

93

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

A

To check if a character is a control character

B

To check if a character is printable

C

To check if a character is a digit

D

To check if a character is a letter

94

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

A

To check if a character is uppercase (A-Z)

B

To check if a character is lowercase

C

To convert to uppercase

D

To convert to lowercase

95

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

A

To check if a character is lowercase (a-z)

B

To check if a character is uppercase

C

To convert to lowercase

D

To convert to uppercase

96

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

A

To convert a character to uppercase

B

To check if a character is uppercase

C

To convert a string to uppercase

D

To check if a character is lowercase

97

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

A

To convert a character to lowercase

B

To check if a character is lowercase

C

To convert a string to lowercase

D

To check if a character is uppercase

98

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

A

To copy a block of memory from source to destination

B

To compare memory blocks

C

To set memory to a value

D

To move memory blocks

99

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

A

To fill a block of memory with a specific value

B

To copy memory

C

To compare memory

D

To move memory

100

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

A

To pause the program for a specified number of seconds

B

To pause the program for a specified number of milliseconds

C

To pause the program indefinitely

D

To speed up the program execution