NIELIT O Level Exam

<p>Predict the output of the following code if the object is moving towards the sensor.</p><pre>int op = 6;<br>int isBarrier = HIGH;<br>void setup() {<br>pinMode(op, INPUT);<br>Serial.begin(9600);<br>}<br>void loop(){<br>isBarrier = digitalRead(op);<br>if (isBarrier == LOW) {<br>Serial.print("1+");<br>}<br>else{<br>Serial.print("clear+"); <br>delay(100);<br>}</pre>

Predict the output of the following code if the object is moving towards the sensor.

int op = 6;
int isBarrier = HIGH;
void setup() {
pinMode(op, INPUT);
Serial.begin(9600);
}
void loop(){
isBarrier = digitalRead(op);
if (isBarrier == LOW) {
Serial.print("1+");
}
else{
Serial.print("clear+"); 
delay(100);
}


यदि वस्तु सेंसर की ओर बढ़ रही है तो निम्नलिखित कोड के आउटपुट का आउटपुट बताये ?

int op = 6;
int isBarrier = HIGH;
void setup() {
pinMode(op, INPUT);
Serial.begin(9600);
}
void loop(){
isBarrier = digitalRead(op);
if (isBarrier == LOW) {
Serial.print("1+");
}
else{
Serial.print("clear+"); 
delay(100);
}

A. clear+clear+1+1

B. 1+1+clear+1

C. 1+1+clear+clear

D. clear+clear+clear+clear




Correct Answer is :

D. clear+clear+clear+clear



Explanation
<p>when the object go away&nbsp;</p><p><span style="font-size: 14px;">clear+clear+clear+...</span></p><p><span style="font-size: 14px;">Then as the object is detected:</span></p><p><span style="font-size: 14px;">1+</span><span style="letter-spacing: 0.01rem;">1+</span><span style="letter-spacing: 0.01rem;">1+1</span></p>
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