Programming in C

1.Which of the following is not necessary for every C program?

• Header file

• Preprocessor directive

• The use of a keyword

• The main function

2.Which of the following statements is incorrect about macros?

• Macros and function calls work differently

• It is always defined in capital letters

• Macros can be undefined using #undef

• You can declare macros with arguments

3.Predict the output of the following code segment:

// Add stdio.h header file in below code

int main()

{

const int limit = 10;

limit++;

printf("%d", limit);

return 0;

}

• Compile error

• 10

• 11

• 0

4.Predict the output of the following code segment:

// Add stdio.h header file in below code

int main ()

{

char line [] = "Welcome to DataFlair tutorials on C Programming";

char string1[10], string2[10], string3[10];

sscanf (line,"%*s %*s %s %*s %*s %s %s",string1, string2, string3);

printf ("%s %s %s \n", string1, string2, string3);

return 0;

}

• Welcome to Dataflair

• Compilation error

• DataFlair C programming

• Welcome DataFlair to programming

5.Which mathematical function would you use to round off 4.23 to 5?

• ceil(4.23)

• floor(4.23)

• ceil(4.23, 5)

• floor(4.23, 5)

6.Which of the following has a global scope in the program?

• Formal parameters

• Constants

• Macros

• Local variables

7.Predict the output of the following code segment:

// Add stdio.h header file in below code

int main()

{

int array[10] = {3, 0, 8, 1, 12, 8, 9, 2, 13, 10};

int x, y, z;

x = ++array[2];

y = array[2]++;

z = array[x++];

printf("%d %d %d", x, y, z);

return 0;

}

• 10 9 10

• 9 10 9

• 9 9 10

• None of the above

8.Which of the following statements about functions is false?

• The main() function can be called recursively

• Functions cannot return more than one value at a time

• A function can have multiple return statements with different return values

• The maximum number of arguments a function can take is 128

9.Predict the output of the following code segment:

// Add stdio.h header file in below code

int main()

{

int x = 6;

int y = 4;

int z;

if(!x >= 5)

y = 3;

z = 2;

printf("%d %d", z, y);

return 0;

}

• 4 2

• 2 4

• 2 3

• 3 2

10.What is the correct way of treating 9.81 as a long double?

• 9.81L

• 9.81LD

• 9.81D

• 9.81DL