C Programming Language

Constant in C Language

⛪ Programming Language > C Programming Language

A constant is basically a named memory location in a program that holds a single value throughout the execution of that program. It can be of any data type- character, floating-point, string and double, integer, etc. There are various types of constants in C. It has two major categories- primary and secondary constants. Character constants, real constants, and integer constants, etc., are types of primary constants. Structure, array, pointer, union, etc., are types of secondary constants.
Test your knowledge of the C language with this set of Constant in C Language MCQs. This quiz covers topics such as constants, data types, and variables. With questions ranging from basic to advanced, this quiz is perfect for anyone looking to brush up on their C language skills. Get ready to challenge yourself and see how much you know about the C language and its constants. ➲ Constant in C Language - Quiz

Q 1: 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

Q 2: What is the output of this C code? 

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

  • A Compilation Error
  • B Runtime Error
  • C C programming Presented by %s Atnyla
  • D None

Q 3: 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

Q 4: 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

Q 5: 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

Q 6: What will be the output of the following program? 
 
#include<stdio.h>
void main()
{
printf("Rambo \n");
printf("\"Rambo\" \n");
printf("\\Rambo\\ \n");
printf("50%% \n"); 
}

  • A 
     Rambo
     "Rambo"
     \Rambo\
     50%
  • B 
     Rambo
     "Rambo"
     \\Rambo\\
     50%%
  • C 
     Rambo
     "Rambo"
     \\Rambo\
     50\%
  • D Error

Q 7: From the following determine the invalid character constants

  • A 'A'
  • B '\\'
  • C '\n'
  • D '/n'

Q 8: 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

Q 9: 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
    WOW atnyla
  • B C programming Class by\n%s atnyla
  • C C programming Class by
    %s Sanfoundry
  • D Compilation error

Q 10: 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

Q 11: 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

Q 12: 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

Q 13: 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

Q 14: What is the output of this C code? 

#include <stdio.h>
    #define MAX 2
    enum bird {SPARROW = MAX + 1, PARROT = SPARROW + MAX};
    int main()
    {
        enum bird b = PARROT;
        printf("%d\n", b);
        return 0;
    }

  • A Compilation error
  • B 5
  • C Undefined value
  • D 2

Q 15: What is the output of this C code? 

#include <stdio.h>
    #include <string.h>
    int main()
    {
        char *str = "x";
        char c = 'x';
        char ary[1];
        ary[0] = c;
        printf("%d %d", strlen(str), strlen(ary));
        return 0;
    }

  • A 1 1
  • B 2 1
  • C 2 2
  • D 1 (undefined value)