Embedded C Language basics - O Level (NIELIT)

Qus. 1 : Which command is the 9th pin on Arduino set as output?

int sensorPin=9
int sensorValue=9
pinMode(9, OUTPUT);
digitalWrite(9, HIGH);

Qus. 2 : What will be the output of the following code?<pre>void main() { int x = 5*6/2 +8; printf("%d",x); return 0; }</pre>

Qus. 3 : What will be the output of the following code?<pre>int main() { int a=5; while(a=123) { printf("RABBIT\n"); } printf("GREEN"); return 0; }</pre>

RABBIT is printed unlimited number of times
RABBIT GREEN
Compiler error
GREEN

Qus. 4 : What will be the output of the following piece of code?<pre>#include <stdio.h> int main()  { int i; for(i=0;i< 8; i++); printf("%d",i); return 0; }</pre><div> </div>

0
1234567
8
Infinite loop

Qus. 5 : In C, how do you set up an array?

int k={3,4}
int k=new int[2]
int k [2] = {3,4};
int k(2)={3,4};

Qus. 6 : What is the output of C program with functions?<pre>int main()  {   int a = 0;   printf("AJAY"); return 1;     printf("VIJAY");     return 1; }</pre><div> </div>

AJAY VIJAY
AJAY
VIJAY
Compiler Error

Qus. 7 : What is the output of C Program?<pre>int main() { int k=10; while(k <= 12) { printf("%d", k); k++; } return 0; }</pre>

10 10 10
12 12 12
10 11 12
12 11 10

Qus. 8 : What programming language is the Arduino IDE written in?

Java
C/C++
Python
Assembly

Qus. 9 : When a= 4, what is the value of b? in the given below statement b = (a > 6 ? 4 : 6);

0
Error
4
6

Qus. 10 : Which compiler is used to translate C/C++ code into binary for AVR microcontrollers?

G++
AVR- GCC
PYTHON
Both A and B

Qus. 11 : What are the functions preprocessor directive in Embedded C programming?

Tell compiler where to find symbols that are not present in program
Give compiler instructions to compile the program
Define variables
Define functions

Qus. 12 : What will be the output of the following code C?<pre>#include <stdio.h> void solve(){ char ch[5] = "abcde"; int ans=0; for(int i =0; i< 5; i++) { ans += (ch[i] - 'a'); } printf("%d", ans); } int main(){ solve(); return 0; } </pre>

Qus. 13 : What is the out come of the following Arduino code?void setup(){Serial.begin(9600);}void setup0{Serial.write(20);}

Send a signal to pin 20 on the Arduino board
Send a octal number of 20 through the Serial pins
Send a byte with value 20 through the Serial pins
Send a hexadecimal number of 20 through the Serial pins

Qus. 14 : Which language is used to bult Arduino IDE ?

Java
HTML
C/C++
Python

Qus. 15 : How are multiline comments denoted in Embedded C?

##
/**/
%%
//

Qus. 16 : How are comments denoted in Embedded C?

#
%
;
//

Qus. 17 : Predict the output of the following code if the object is moving away from the sensor<pre>int op = 7; int isBarrier = HIGH; void setup() { pinMode(op, INPUT); Serial.begin(9600); } void loop() { isBarrier = digitalRead(op); if (isBarrier == LOW) { Serial.println("1+"); } else { Serial.print("clear+"); } delay(100); } </pre>

clear+clear+1+1
1+1+clear+clear
clear+clear+clear+clear
1+1+clear+1

Qus. 18 : Embedded C is?

A subset of traditional C
An extension of traditional C
A superset of traditional C
Same as traditional C

Qus. 19 : A set of homogenous data stored in consecutive memory locations is called

List
Structure
Array
Union

Qus. 20 : What will be the output of the following code<pre>#include <stdio.h> void solve(){ int b=4; int res = b++ + ++b + ++b; printf("%d", res); } int main(){ solve(); return 0; } </pre>

Qus. 21 : What is the output of the following program?for(;;){Statements}<div> </div>

Error
Statements will run forever
This an infinite loop
Both (B) and (C)

Qus. 22 : What is the objective of the code given below if it is executed on the Arduino Uno?<pre>#include<EEPROM.h> int pin=13; void setup() { pinMode(pin,OUTPUT); Serial.begin(9600); { void loop() for(int i-0; i<EEPROM.length(); it+) { EEPROM.write(i, 1) digitalWrite(pin,HIGH; exit(0); }</pre>

Clear EEPROM
Fill EEPROM with 1's
Export EEPROM data
Fill EEPROM with 0's

Qus. 23 : What is the output of the following program?<pre>for(;;)  { Statements }</pre>

Error
Statemernts will run forever
This an infinite loop
Both (B) and (C)

Qus. 24 : Predict the output of the following code if the object is moving towards the sensor.<pre>int op = 6; int isBarrier = HIGH; void setup() { pinMode(op, INPUT) Serial.begin(9600); } void loop(){ isBarrier = digitalRead(op); if (isBarrier == LOW) { Serial.println("1+"); } else{ Serial.print("clear+");  delay(100); }</pre>

clear+clear+1+1
1+1+clear+1
1+1+clear+clear
clear+clear+clear+clear

Qus. 25 : A single line comment begins with _____

// (two adjacent slashes )
/**/
*/ */
None of the Above

Programs

Arduino Program to take input from serial and on the led based on input.