Constant in C Language - Quiz

Q: What is the output of this code?


   #include <stdio.h>
    int main()
    {
        enum {INDIA = 6, USA, UK = 8, CANADA};
        printf("CANADA = %d\n", CANADA);
    }

A. CANADA = 7
B. CANADA = 9
C. CANADA = 3
D. CANADA = 5

Correct Option: B
Explanation:

In enum, the value of constant is defined to the recent assignment from left.

CANADA = 9

Q: What is the output of this C code?


#include <stdio.h>
    enum birds {SPARROW, PEACOCK, PARROT};
    enum animals {TIGER = 8, LION, RABBIT, ZEBRA};
    int main()
    {
        enum birds m = TIGER;
        int k;
        k = m;
        printf("%d\n", k);
        return 0;
    }

A. 0
B. Compile time error
C. 1
D. 8

Correct Option: D
Explanation: Answer:d
m is an integer constant, hence compatible. Output:

$ cc pgm5.c
$ a.out
8

Q: What will be the output of the program?


#include<stdio.h>

int main()
{
    const int i=0;
    printf("%d\n", i++);
    return 0;
}

A. 0
B. Error
C. No Output
D. None

Correct Option: B
Explanation:

Error

Q: What is the output of this C code?


#include <stdio.h>
    #define a 10
    int main()
    {
        const int a = 5;
        printf("a = %d\n", a);
    }

A. a = 5
B. a = 10
C. Compilation error
D. Runtime error

Correct Option: C
Explanation: The #define substitutes a with 10 leaving no identifier and hence compilation error.
Output:

$ cc pgm3.c
pgm3.c: In function 'main':
pgm3.c:5: error: expected identifier or '(' before numeric constant

Q: What is the output of this C code?


    #include <stdio.h>
    #define a 10
    int main()
    {
        const int a = 5;
        printf("a = %d\n", a);
    }

A. a = 5
B. Compile Time Error
C. Run Time Error
D. None

Correct Option: B
Explanation:

Compilation Error

Q: For the following code snippet:

       char *str = "atnyla.com\0" "training classes";

The character pointer str holds reference to string:

A. atnyla.com
B. atnyla.com\0training classes
C. atnyla.comtraining classes
D. Invalid declaration

Correct Option: B
Explanation: Answer:b
'\0' is accepted as a char in the string. Even though strlen will give length of string "atnyla.com", in memory str is pointing to entire string including training classes"

Q: What will be the output of the program?

 
#include<stdio.h>

int main()
{
    const char *s = "";
    char str[] = "Atnyla";
    s = str;
    while(*s)
        printf("%c", *s++);

    return 0;
}

A. A
B. Atnyla
C. Atn
D. Error

Correct Option: B
Explanation:

Output:

Atnyla

Q: What is the output of this C code?


#include <stdio.h>
    int main()
    {
        int var = 010;
        printf("%d", var);
    }

A. 2
B. 8
C. 9
D. 10

Correct Option: B
Explanation: Answer:b
010 is octal representation of 8.

Output:

$ cc pgm4.c
$ a.out
8

Q: What is the output of this C code?

 
#include <stdio.h>
    int main()
    {
        enum {ORANGE = 5, MANGO, BANANA = 4, PEACH};
        printf("PEACH = %d\n", PEACH);
    }

A. PEACH = 3
B. PEACH = 4
C. PEACH = 5
D. PEACH = 6

Correct Option: C
Explanation: Answer:c
In enum, the value of constant is defined to the recent assignment from left. Output:

$ cc pgm1.c
$ a.out
PEACH = 5

Q: What is the output of this C code?

 
#include <stdio.h>
    int main()
    {
        printf("C programming %s", "Class by\n%s atnyla", "WOW");
    }

A. C programming Class by <br>WOW atnyla
B. C programming Class by\n%s atnyla
C. C programming Class by <br>%s Sanfoundry
D. Compilation error

Correct Option: C
Explanation: Answer:c
This program has only one %s within first double quotes, so it does not read the string "WOW". The %s along with the Sanfoundry is not read as a format modifier while new line character prints the new line. Output:

$ cc pgm2.c
$ a.out
C programming Class by
%s atnyla

Constant in C Language - Quiz

What is the output of this code? #include <stdio.h> int main() { enum {INDIA = 6, USA, UK = 8, CANADA}; printf("CANADA = %d\n", CANADA); }

What is the output of this C code? #include <stdio.h> enum birds {SPARROW, PEACOCK, PARROT}; enum animals {TIGER = 8, LION, RABBIT, ZEBRA}; int main() { enum birds m = TIGER; int k; k = m; printf("%d\n", k); return 0; }

What will be the output of the program? #include<stdio.h> int main() { const int i=0; printf("%d\n", i++); return 0; }

What is the output of this C code? #include <stdio.h> #define a 10 int main() { const int a = 5; printf("a = %d\n", a); }

What is the output of this C code? #include <stdio.h> #define a 10 int main() { const int a = 5; printf("a = %d\n", a); }

For the following code snippet: char *str = "atnyla.com\0" "training classes"; The character pointer str holds reference to string:

What will be the output of the program? #include<stdio.h> int main() { const char *s = ""; char str[] = "Atnyla"; s = str; while(*s) printf("%c", *s++); return 0; }

What is the output of this C code? #include <stdio.h> int main() { int var = 010; printf("%d", var); }

What is the output of this C code? #include <stdio.h> int main() { enum {ORANGE = 5, MANGO, BANANA = 4, PEACH}; printf("PEACH = %d\n", PEACH); }

What is the output of this C code? #include <stdio.h> int main() { printf("C programming %s", "Class by\n%s atnyla", "WOW"); }

What is the output of this code?

What is the output of this C code?

What will be the output of the program?

What is the output of this C code?

What is the output of this C code?

For the following code snippet:
char *str = "atnyla.com\0" "training classes";
The character pointer str holds reference to string:

What will be the output of the program?

What is the output of this C code?

What is the output of this C code?

What is the output of this C code?