Embedded Systems Domain Proficiency Test-II

Which of the following is a correct way to concatenate two strings in C using macros?

• #define CONCAT(a, b) a + b

• #define CONCAT(a, b) a , b

• #define CONCAT(a, b) a ## b

• #define CONCAT(a, b) a || b

In dynamic memory allocation, what does the sizeof() operator determine?

• Size of the allocated block

• Size of the data type

• Size of the pointer

• Size of the structure

In C, the main function can take command line arguments. What is the prototype of such a main function?

• int main(int argc , char *argv)

• void main(int argc, char *argv[])

• void main(char* args[])

• int main(char* arguments)

How do you access the second command line argument in C?

• argv[1]

• argv[2]

• argc[1]

• args[2]

What does the memset() function do in C?

• Copies memory block

• Moves memory block

• Sets memory block with a constant value

• Allocates memory block

What is the purpose of bitfields in C structures?

• To define character arrays

• To represent integer values using fewer bits

• To create bit-wise operators

• To create bit-wise operators

What will be the output of the code below?

#define SQUARE(x) x * x

int main() {
    int result = SQUARE(3 + 2);
    printf("%d\n", result);
    return 0;
}

• 25

• 14

• 11

• Compiler Error

What is the purpose of a linked list?

• To store elements in contiguous memory locations

• To implement dynamic arrays

• To store elements in non-contiguous memory locations

• To implement stacks only

What will be the output of the code below?

#include <stdio.h>

int main() {
    FILE *file = fopen("example.txt", "w");
    fprintf(file, "Hello, World!");
    fclose(file);
    return 0;
}

• Reads from a file

• Writes to a file

• Appends to a file

• Closes a file

What will be the output of the code below?

#include <string.h>
#include <stdlib.h>

int main() {
    char str[] = "Programming";
    printf("%d  %d\n", strlen(str),sizeof(str));
   
    return 0;
}

• 11  11

• 12  11

• 11  12

• 11  8