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C Programming :: Const

Const - Point Out Errors
Const - Find Output of Program

  1. Point out the error in the program (in Turbo-C).

     #include
 #define MAX 128 

 int main() 
 {  
      const int max=128;   
      char array[max];    
      char string[MAX];    
      array[0] = string[0] = 'A';     
      printf("%c %c\n", array[0], string[0]);  
      return 0; 
 }

     

    2. A.

    Error: unknown max in declaration/Constant expression required
    B.

    Error: invalid array string
    C.

    None of above
    D.

    No error. It prints A A

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  2. Point out the error in the program.

     #include
 #include 
 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; 
 }

    3. A.

    Error: RValue required
    B.

    Error: cannot modify const object
    C.

    Error: LValue required in strcpy
    D.

    No error

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  3. Point out the error in the program.

     #include
 const char *fun(); 

 int main()
 {
     char *ptr = fun();   
     return 0; 
 }
 const char *fun() 
 {   
    return "Hello";
 }

    4. 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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  4. Point out the error in the program.

    #include 

 int main() 
 {   
      const int x;   
      x=128;    
      printf("%d\n", x);     
      return 0; 
 }

    5. 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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  5. Point out the error in the program.

     #include

  int main()
  {    
       const int k=7; 
       int *const q=&k;     
       printf("%d", *q); 
       return 0; 
 }

    6. 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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  6. Point out the error in the program.

    #include 
#define MAX 128  

 int main()
 {  
    char mybuf[] = "Fresher";  
    char yourbuf[] = "GATE";   
    char const *ptr = mybuf;     
    *ptr = 'a';     
    ptr = yourbuf;     
    return 0; 
}

    7. A.

    Error: cannot convert ptr const value
    B.

    Error: unknown pointer conversion
    C.

    No error
    D.

    None of above

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  7. Point out the error in the program.

    
#include
 const char *fun();  

 int main()
 {    
     *fun() = 'A';   
     return 0; 
 }
 const char *fun()
 {   
     return "Hello"; 
 }

    8. 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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