Embedded C MCQs (Chapterwise Multiple Choice Questions)

What will be the output of the following program?
#include <stdio.h>
void abc(int num1[], int size)
{
int a = 0, b = size–1;
while (a < b)
{
while (num1[a] == 0 && a < b)
a++;
while (num1[b] == 1 && a < b)
b––;
if (a < b)
{
num1[a] = 0;
num1[b] = 1;
a++;
b––;
}
}
}
int main()
{
int num[] = {1, 0, 1, 0, 1, 0, 1, 1, 0};
int z = 9, x = 0;
abc(num, z);
for (x = 0; x < 9; x++)
printf("%d ", num[x]);
getchar();
return 0;
}

1 0 1 0 1 0 1 0 1

1 1 0 0 1 1 0 0 1

0 0 0 0 1 1 1 1 1

1 1 1 1 1 0 0 0 0

Answer & Explanation

Correct Answer:

0 0 0 0 1 1 1 1 1

Note: This Question is unanswered, help us to find answer for this one

What is the output of the following program ?
main()
{
int u = 1, v = 3;
printf("%d %d",u,v);
funct1(&u,&v);
printf(" %d %d\n",u,v);
}
void funct1(int pu, int pv)
{
pu=0;
pv=0;
return;
}

1 3 1 3

1 3 1 1

1 3 0 0

1 1 1 1

3 1 3 1

Answer & Explanation

Correct Answer:

1 3 0 0

Note: This Question is unanswered, help us to find answer for this one

Which of the following are types of hardware interrupts?

Timer overflow

Signal to pin

Serial port interrupts

SWI instruction

Answer & Explanation

Correct Answer: Serial port interrupts

Note: This Question is unanswered, help us to find answer for this one

Which of the following statements are correct about the embedded system, TIMER interrupt?

Access to external clock is provided by TIMER interrupts.

An overflow occurs when timer goes from 0000 0000 to 1111 1111.

A watchdog can be built using TIMER interrupts.

Answer & Explanation

Correct Answer: A watchdog can be built using TIMER interrupts.

Note: This Question is unanswered, help us to find answer for this one

Which of the following options is used for reusing the 16-bit pseudo index register, __longIX, created earlier by the compiler?

long int exampleVar @ _ _longIX;

long int @ _ _longIX, exampleVar;

long int exampleVar $ _ _longIX;

long int $ _ _longIX, exampleVar;

Answer & Explanation

Correct Answer: long int exampleVar @ _ _longIX;

Note: This Question is unanswered, help us to find answer for this one

In relation to the watchdog timer register (WDTCTL), which of the following values for WDTISx bits signifies watchdog clock source, /512?

00

01

10

11

Answer & Explanation

Correct Answer: 10

Note: This Question is unanswered, help us to find answer for this one

If a full binary tree has a total of 63 nodes, then what will be the numbers of the internal nodes and the leaves, respectively, in the binary tree?

31 and 32

34 and 29

33 and 30

28 and 35

Answer & Explanation

Correct Answer: 31 and 32

Note: This Question is unanswered, help us to find answer for this one

What will be the output of the following program?
#include <stdio.h>
struct st1
{
int a;
struct st1 *ptr1 ;
};
main( )
{
struct st1 w1,w2;
w1.a = 251 ;
w2.a = 351 ;
w1.ptr1 = &w2 ;
w2.ptr1 = &w1 ;
printf ( "%d %d", w1.ptr1 –> a, w2.ptr1 –> a ) ;
}

251 251

351 351

251 351

351 251

Answer & Explanation

Correct Answer:

351 251

Note: This Question is unanswered, help us to find answer for this one

Which of the given types of memories has the following characteristics?
i) It requires a block-sized 'erase' operation before this type of memory can be programmed.
ii) It is used for the storage of a program code.

EEPROM

Flash ROM

UV EPROM

PROM

Answer & Explanation

Correct Answer:

Flash ROM

Note: This Question is unanswered, help us to find answer for this one

Choose the correct output of the following C program.
int main( )
{
int i = 3, j = 4, k, l ;
k = abc ( i, j ) ;
l = abc ( i, j ) ;
k=k+3;
l=l+3;
printf ( "%d %d", k, l ) ;
return 0;
}
abc ( int ii, int jj )
{
int kk, ll ;
kk = ii + jj+3 ;
ll = ii * jj+2 ;
return ( kk, ll ) ;
}

10, 14

13, 17

13, 13

17, 17

Compilation error

Answer & Explanation

Correct Answer:

17, 17

Note: This Question is unanswered, help us to find answer for this one

Embedded C Quick Quiz

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Correct Answers: 0/10

Start Practicing with our MCQs given below.

Embedded C MCQ

Embedded C Quick Quiz

What is the output of the following program ?main(){ int u = 1, v = 3; printf("%d %d",u,v); funct1(&u,&v); printf(" %d %d\n",u,v);}void funct1(int *pu, int *pv){ *pu=0; *pv=0; return;}

Which of the following are types of hardware interrupts?

Which of the following statements are correct about the embedded system, TIMER interrupt?

Which of the following options is used for reusing the 16-bit pseudo index register, __longIX, created earlier by the compiler?

In relation to the watchdog timer register (WDTCTL), which of the following values for WDTISx bits signifies watchdog clock source, /512?

If a full binary tree has a total of 63 nodes, then what will be the numbers of the internal nodes and the leaves, respectively, in the binary tree?

What will be the output of the following program?#include <stdio.h>struct st1{ int a; struct st1 *ptr1 ;};main( ){ struct st1 w1,w2; w1.a = 251 ; w2.a = 351 ; w1.ptr1 = &w2 ; w2.ptr1 = &w1 ; printf ( "%d %d", w1.ptr1 –> a, w2.ptr1 –> a ) ;}

Which of the given types of memories has the following characteristics?i) It requires a block-sized 'erase' operation before this type of memory can be programmed.ii) It is used for the storage of a program code.

Choose the correct output of the following C program.int main( ){ int i = 3, j = 4, k, l ; k = abc ( i, j ) ; l = abc ( i, j ) ; k=k+3; l=l+3; printf ( "%d %d", k, l ) ; return 0;}abc ( int ii, int jj ){ int kk, ll ; kk = ii + jj+3 ; ll = ii * jj+2 ; return ( kk, ll ) ;}

What is the output of the following program ?
main()
{
int u = 1, v = 3;
printf("%d %d",u,v);
funct1(&u,&v);
printf(" %d %d\n",u,v);
}
void funct1(int pu, int pv)
{
pu=0;
pv=0;
return;
}

What will be the output of the following program?
#include <stdio.h>
struct st1
{
int a;
struct st1 *ptr1 ;
};
main( )
{
struct st1 w1,w2;
w1.a = 251 ;
w2.a = 351 ;
w1.ptr1 = &w2 ;
w2.ptr1 = &w1 ;
printf ( "%d %d", w1.ptr1 –> a, w2.ptr1 –> a ) ;
}

Which of the given types of memories has the following characteristics?
i) It requires a block-sized 'erase' operation before this type of memory can be programmed.
ii) It is used for the storage of a program code.

Choose the correct output of the following C program.
int main( )
{
int i = 3, j = 4, k, l ;
k = abc ( i, j ) ;
l = abc ( i, j ) ;
k=k+3;
l=l+3;
printf ( "%d %d", k, l ) ;
return 0;
}
abc ( int ii, int jj )
{
int kk, ll ;
kk = ii + jj+3 ;
ll = ii * jj+2 ;
return ( kk, ll ) ;
}