MCQ Set 1 - C - Quiz, Flashcards & Trivia

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1. What is the output of the following 'C' program?
main ( )
{
printf ('' % f '', sqrt (36.0));
}

6.0

6.000000

Some absurd result

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2. What is the output of the following 'C' program?
main ( )
{
int a [5] = {2, 3};
print f (''\n % d % d % d'', a [2], a [3], a [4]);
}

Garbage values

2 3 3

3 2 2

0 0 0

3. What is the output of the following 'C' program? main ( )
{
printf (''% d % d % d", sizeof(3.14 f),
sizeof (3.14), sizeof (3.14 l));
}

4 4 4

4 Garbage value

4 8 10

Error

4. We want to round off x, a float, to an int value. What is the correct way to do so?

Y = (int) (x + 0.5);

Y = int (x +0.5);

Y = (int) x + 0.5;

Y = (int (int) x + 0.5;

5. By default any real number in 'C' is treated as

A float

A double

A long double

Depends upon the memory model that you are using

6. What is the output of the following 'C' program?
main
{
printf (''%c'', ''abcdefgh'' [4]); }

Error

Abcdefgh

7. In the following 'C' code in which order the functions would be called?
a = (f 1 (23, 14) * f 2 (12 / 4) + f 3 ( ));

F1, f2, f3

F3, f2, f1

The order may vary from compiler to compiler

None of these

8. What is the output of the following 'C' program?
main ( )
{
int x = 10, y = 10, z = 5, i;
i = x <y <z;
printf ("\n % d'', i); }

Error

9. What is the output of the following 'C' program?
main ( )
{
extern int i;
i = 20;
print ( "% d'', sizeof(i));
}

Would vary from compiler to compiler

Error, i undefined

10. Consider the following program:
main ( )
{
int x = 2, y = 5;
if (x < y) return (x = x + y);
else print f("zl");
print f("z2");
}
Then

Output is z2

Output is z1z2

This will result in compilation error

None of these

Return always terminates the function that executed it. main ( ) being a function, will be terminated when it executes the return statement. The return value will be returned to the calling environment, which is the operating system in this case.

Explanation

11. Which header file should you include if you are to develop a function that can accept variable number of arguments?

Vararg. h

Stadlib. h

Stdio. h

Stdarg. h

12. What is the output of the following 'C' program?
main ( )
{
int i = 2;
print f (''\n % d % d'', + + i, + + i);
}

3 4

4 3

4 4

Output may vary from compiler to compiler

13. What is the output of the following 'C' program?
main
{
Float a = 0. 7;
if (a < 0.7)
print f (''C'');
else
print f ('' C + + '');
}

C++

Error

None of the above

14. What is the output of the following 'C' program?
main ( )
{
char str [7] = ''strings'';
print ('' % c ''; str);
}

Error

Strings

Cannot predict

None of these

15. The following program
main ( )
{
static int a { } = {7, 8, 9};
print f("%d", a {2} = 2 [a] + A [2];

}

Results in bus error

Results in segmentation violation error

Will not compile successfully

None of these

a [2] will be converted to * (a + 2)
* (a + 2) can sas well be written as * (2 + a)
* (2 + a) is nothing but 2 [a]. So, a [2] is sam eas 2 [a], which is same as * (2 + a). So, it prints 9 + 9 = 18

Explanation

a [2] will be converted to * (a + 2)
* (a + 2) can sas well be written as * (2 + a)
* (2 + a) is nothing but 2 [a]. So, a [2] is sam eas 2 [a], which is same as * (2 + a). So, it prints 9 + 9 = 18

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Mar 20, 2022

Quiz Edited by
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Jul 29, 2010

Quiz Created by
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