Aptitude Test C Programming For Data Types

Welcome to Your Quiz: Aptitude Test C Programming For Data Types

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1. Comment on the output of this C code?
    int main()
    {
        float f1 = 0.1;
        if (f1 == 0.1)
            printf("equal\n");
        else
            printf("not equal\n");
    }

None of the mentioned

Output depends on compiler

equal

not equal

2. Which of the following % operation is invalid?

4 % 8;

4 % 8l;

Both (b) and (c)

4 % 8f;

3. Which of the datatypes have size that is variable?

float

double

struct

int

4. Loss in precision occurs for typecasting from____________.

float to int

float to double

long to float

char to short

5. Which of the following is a User-defined data type?

typedef enum {Mon, Tue, Wed, Thu, Fri} Workdays;

struct {char name[10], int age};

typedef int Boolean;

All of the mentioned

6. What is the output of this C code?
    int main()
    {
        float a = 5.477777777777;
        printf("%f", a);
    }

5.477778

5.477

5.48

5.477777

7. Which data type is most suitable for storing a number 65000 in a 32-bit system?

double

long

short

int

8. What is the size of float in a 32-bit compiler?

9. What is short int in C programming?

All of the mentioned

short is the qualifier and int is the basic datatype

Qualifier

Basic datatype of C

10. Comment on the output of this C code?
    int main()
    {
        int a[5] = {1, 2, 3, 4, 5};
        int i;
        for (i = 0; i < 5; i++)
            if ((char)a[i] == '5')
                printf("%d\n", a[i]);
            else
                printf("FAIL\n");
    }

Program will compile and print the ASCII value of 5

The compiler will flag an error

Program will compile and print FAIL for 5 times

Program will compile and print the output 5

11. %f access specifier is used for?

None of the above

float type

Integer type

character type

12. The format identifier ‘%i’ is also used for _____ data type?

int

float

char

double

13. Select the odd one out with respect to type?

char

float

int

double

14. The number of digits present after decimal in float is________.

15. Comment on the output of this C code?
    int main()
    {
        float f1 = 0.1;
        if (f1 == 0.1f)
            printf("equal\n");
        else
            printf("not equal\n");
    }

None of the mentioned

Output depends on compiler

equal

not equal

16. What is the output of this C code?
    int main()
    {
       char chr;
       chr = 128;
       printf("%d\n", chr);
       return 0;
    }

128

-128

None of the mentioned

17. What is the output of this C code (on a 32-bit machine)?
    int main()
    {
        int x = 10000;
        double y = 56;
        int *p = &x;
        double *q = &y;
        printf("p and q are %d and %d", sizeof(p), sizeof(q));
        return 0;
    }

p and q are 4 and 8

p and q are 4 and 4

Compiler error

p and q are 2 and 8

18. Which is correct with respect to size of the datatypes?

char < int < double

int > char > float

char > int > float

double > char > int

19. What is the size of an int data type?

8 Bytes

Depends on the system/compiler

2 Bytes

4 Bytes

20. What is the output of this C code?
    int main()
    {
        float x = 'a';
        printf("%f", x);
        return 0;
    }

run time error

a.000000

97.000000

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