O Level Internet of Things Paper July 2024
निम्नलिखित कोड स्निपेट का आउटपुट क्या होगा?
What will be the output of the following code snippet?
int i, j;
for (i = 0; i < 3; i++) {
for (j = 0; j < 2; j++) {
printf("%d%d", i, j);
}
}Let's break down the given code snippet:
Code:
int i, j;
for (i = 0; i < 3; i++) {
for (j = 0; j < 2; j++) {
printf("%d%d", i, j);
}
}
Explanation:
- Outer loop (over
i): Runs 3 times (fromi = 0toi = 2). - Inner loop (over
j): Runs 2 times for each iteration ofi(fromj = 0toj = 1). - The
printfprints the values ofiandjin the formati jwithout spaces.
Let's go through the iterations:
- When
i = 0,jwill take values0and1, so the output will be00and01. - When
i = 1,jwill take values0and1, so the output will be10and11. - When
i = 2,jwill take values0and1, so the output will be20and21.
Thus, the final output will be: 0001 1011 2021.
Correct Answer:
(B) 000110112021.
Correct Answer: B) 000110112021
Arduino पर 9वां पिन किस कमांड से आउटपुट के रूप में सेट किया गया है?
With which command is the 9th pin on Arduino set as output?
To set the 9th pin of the Arduino as an output, the correct command is:
Correct Command:
pinMode(9, OUTPUT);
This command configures pin 9 as an output pin, allowing you to control it using other functions like digitalWrite.
Correct Answer:
(D) pinMode(9, OUTPUT);
Correct Answer: D) pinMode(9, OUTPUT);
निकटता सेंसर का उपयोग _____ के लिए किया जाता है।
Proximity sensors are used to _____.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.
Correct Answer: D) Detect non-magnetic but conductive materials
निम्नलिखित Arduino कोड में while लूप क्या करता है?
What does the while loop in the following Arduino code do?
while(analogRead(sensorPin) > 100)
{
flashLED(); // call a function to turn an LED on and off
}
In this Arduino code, the while loop continuously calls the flashLED() function as long as the analog reading from the sensor (obtained using analogRead(sensorPin)) is greater than 100. Once the sensor reading drops to 100 or below, the loop stops executing.
So, the loop repeats the flashLED() function as long as the sensor value is above 100.
Correct Answer:
(C) Repeats flashLED() while reading > 100.
Correct Answer: C) Repeats flashLED() while reading > 100
Arduino के साथ वायरलेस संचार के लिए निम्नलिखित में से कौन सा तत्व उपलब्ध है?
Which of the following elements are available for wireless communication with Arduino?
The correct option for wireless communication with Arduino is:
(C) NRF24l01
Explanation:
- NRF24l01 is a wireless communication module that allows Arduino to communicate wirelessly with other devices. It operates on the 2.4 GHz frequency band and is commonly used for tasks such as sending and receiving data between Arduinos or other wireless devices.
Why other options are incorrect:
- (A) DS18B20: This is a digital temperature sensor, not a wireless communication device.
- (B) 74HC595: This is a shift register, used for expanding the number of output pins, not for wireless communication.
- (D) MPU6050: This is a motion tracking sensor (accelerometer and gyroscope), not a wireless communication device.
Correct Answer:
(C) NRF24l01
Correct Answer: C) NRF24l01
सरणी के चौथे तत्व तक पहुंचने के लिए सही विकल्प चुनें:
Choose the correct option to access the 4th element of the array :
int z [30];
int *pz;
pz = z;
ARM7TDMI-S किस पाइपलाइनिंग का उपयोग करता है?
The ARM7TDMI-S uses which pipelining?
The ARM7TDMI-S processor uses a 3-stage pipeline.
Explanation:
The ARM7TDMI-S architecture uses a 3-stage pipeline:
- Fetch: Instruction is fetched from memory.
- Decode: The fetched instruction is decoded to identify the operation.
- Execute: The decoded instruction is executed and the result is written back to the register or memory if necessary.
Correct Answer:
(B) 3-Stage
Correct Answer: B) 3-Stage
Arduino UNO पर वोल्टेज रेगुलेटर का आउटपुट वोल्टेज क्या है?
What is the output voltage of the voltage regulator on the Arduino UNO?
The Arduino UNO uses a voltage regulator that provides two common output voltages:
- 5V - This is the primary output voltage for powering the microcontroller and other components on the board.
- 3.3V - Some boards (like Arduino Due) have a 3.3V regulator, but on the standard Arduino UNO, this is usually used for peripherals.
However, the main voltage output from the voltage regulator is 5V.
Correct Answer:
(C) 5V and 3.3V
Correct Answer: C) 5V and 3.3V
निम्नलिखित कोड का परिणाम क्या है:
What is the output of the following code:
#include<stdio.h>
int main(){
int x=1, y=1,z;
z=x++ +y
printf("%d, %d",x,y);
The given C code contains the following:
#include
int main(){
int x=1, y=1, z;
z = x++ + y;
printf("%d, %d", x, y);
}
Explanation:
-
x = 1, y = 1: Initially, both
xandyare set to1. -
z = x++ + y:
x++is the post-increment operator. It uses the current value ofx(which is1), and then incrementsxby 1.- So,
z = 1 + 1results inz = 2, and after this,xbecomes2due to the post-increment.
-
printf("%d, %d", x, y):
- After the post-increment,
xis2andyremains1.
- After the post-increment,
Thus, the output is:
Correct Answer:
(A) 2,1
Correct Answer: A) 2,1
IPv4 पते में कितने बिट होते हैं?
How many bits are there in an IPv4 address?
An IPv4 address is made up of 32 bits, divided into four octets (each containing 8 bits), typically represented in decimal form as four numbers separated by periods (e.g., 192.168.0.1).
Correct Answer:
(C) 32
Correct Answer: C) 32
Arduino Uno पर कितने एनालॉग इनपुट पिन उपलब्ध हैं?
How many analog input pins are available on Arduino Uno?
The Arduino Uno has 6 analog input pins labeled from A0 to A5.
Correct Answer:
(B) 6
Correct Answer: B) 6
Arduino Uno में प्रयुक्त माइक्रोकंट्रोलर क्या है?
What is the microcontroller used in Arduino Uno?
The microcontroller used in the Arduino Uno is the ATmega328P.
Correct Answer:
(A) ATmega328P
Correct Answer: A) ATmega328P
निम्नलिखित Arduino कोड का आउटपुट क्या होगा?
What will be the output of the following Arduino code ?
void main() {
int k = 0;
double d = 10.21;
printf(“%lu”, sizeof(k + d));
}
void loop() {}
The given Arduino code is:
void main() {
int k = 0;
double d = 10.21;
printf("%lu", sizeof(k + d));
}
void loop() {}
Explanation:
-
int k = 0; double d = 10.21;:kis an integer, anddis a double.
-
sizeof(k + d):- In the expression
k + d,kis promoted todoublebecause arithmetic operations between integers and doubles result in adoubletype. - The result of
k + dwill be a double.
- In the expression
-
sizeof(k + d):- The
sizeofoperator returns the size of the resulting type of the expression. - Since the result of
k + dis adouble, and the size of adoubleis 8 bytes on most systems,sizeof(k + d)will return 8.
- The
Correct Answer:
(B) 8
Correct Answer: D) 23
ऐरे वाले C प्रोग्राम का सही विकल्प चुनें:
Choose the correct option of C program having array:
int main ()
{
int xyz (4) = [10,20,30,40];
printf (“%d”, xyz (1)); }
The given C code is:
int main ()
{
int xyz(4) = [10, 20, 30, 40];
printf("%d", xyz(1));
}
Explanation:
-
Array Declaration: The code attempts to declare an array as
int xyz(4) = [10, 20, 30, 40];.- The correct way to declare an array in C is by using square brackets, not parentheses.
- It should be
int xyz[4] = {10, 20, 30, 40};.
-
Accessing Array: The code tries to access the array using
xyz(1), which is incorrect. The correct way to access the array isxyz[1], notxyz(1).
So, there are syntax errors in both the declaration and the way the array is accessed.
Correct Answer:
(B) Compile error
Correct Answer: B) Compile error
यदि "पिन2" को "1011" भेजा जाता है जहां 1 5V है और 0 0V है तो "पिन1" का आउटपुट क्या है?
What is the output of “pin1” if “pin2” is sent “1011” where 1 is 5V and 0 is 0V?
int pin1 = 12;
int pin2 = 11;
void setup() {
pinMode(pin1, OUTPUT);
pinMode(pin2, INPUT);
Serial.begin(9600);
}
void loop() {
if(digitalRead(pin2)==1) {
digitalWrite(pin1,LOW);
}
else if(digitalRead(pin2)==0) {
digitalWrite(pin1,HIGH);
}
}
The given Arduino code reads the input from pin2 and changes the output on pin1 based on whether the value from pin2 is HIGH (1) or LOW (0).
Explanation:
- For each bit in
1011sent to pin2:- 1 means pin2 is HIGH → pin1 is set to LOW.
- 0 means pin2 is LOW → pin1 is set to HIGH.
Thus, for the sequence 1011:
- pin2 (1) → pin1 = LOW
- pin2 (0) → pin1 = HIGH
- pin2 (1) → pin1 = LOW
- pin2 (1) → pin1 = LOW
The resulting output for pin1 will be 0100.
Final Answer:
(B) 0100
Correct Answer: B) 0100