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Const

1

Point out the error in the program. 

#include<stdio.h>
const char *fun();

int main()
{
    *fun() = 'A';
    return 0;
}
const char *fun()
{
    return "Hello";
}
A. Error: RValue required
B. Error: Lvalue required
C. Error: fun() returns a pointer const character which cannot be modified
D. No error
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2

Point out the error in the program. 

#include<stdio.h>

int main()
{
    const int k=7;
    int *const q=&k;
    printf("%d", *q);
    return 0;
}
A. Error: RValue required
B. Error: Lvalue required
C. Error: cannot CONVERT from 'const int *' to 'int *const'
D. No error
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3

Point out the error in the program. 

#include<stdio.h>
int main()
{
    const int x;
    x=128;
    printf("%d\n", x);
    return 0;
}
A. Error: unknown data type const int
B. Error: const variable have been initialised when declared.
C. Error: stack overflow in x
D. No error
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4

Point out the error in the program. 

#include<stdio.h>
const char *fun();

int main()
{
    char *ptr = fun();
    return 0;
}
const char *fun()
{
    return "Hello";
}
A. Error: Lvalue required
B. Error: cannot convert 'const char *' to 'char *'
C. No error and No output
D. None of above
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5

Point out the error in the program. 

#include<stdio.h>
#include<stdlib.h>

union employee
{
    char name[15];
    int age;
    float salary;
};
const union employee e1;

int main()
{
    strcpy(e1.name, "K");
    printf("%s", e1.name);    
    e1.age=85;
    printf("%d", e1.age);
    printf("%f", e1.salary);
    return 0;
}
A. Error: RValue required
B. Error: cannot modify const object
C. Error: LValue required in strcpy
D. No error
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