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C Programming :: Memory Allocation

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Memory Allocation - Yes / No Questions
Memory Allocation - Find Output of Program
Memory Allocation - True / False Questions
Memory Allocation - Point Out Correct Statements

  1. Which of the following statement is correct prototype of the malloc() function in c ?

    2. A.
    int* malloc(int);
    B.
    char* malloc(char);
    C.
    unsigned int* malloc(unsigned int);
    D.
    void* malloc(size_t);

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  2. Point out the correct statement which correctly free the memory pointed to by 's' and 'p' in the following program?

     #include
 #include 

  int main() 
  {   
       struct ex    
       {       
          int i;    
          float j;  
          char *s  
      }; 
      struct ex *p;  
      p = (struct ex *)malloc(sizeof(struct ex));   
      p->s = (char*)malloc(20);   
      return 0;
  }

     

    3. A.

    free(p); , free(p->s);
    B.

    free(p->s); , free(p);
    C.

    free(p->s);
    D.

    free(p);

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  3. Point out the correct statement which correctly allocates memory dynamically for 2D array following program?

     #include
 #include 

  int main() 
  {     
        int *p, i, j;  
        /* Add statement here */   
        for(i=0; i3; i++)    
        {         
             for(j=0; j4; j++)       
             {             
                 p[i*4+j] = i;      
                 printf("%d", p[i*4+j]);        
             } 
         }  
         return 0;
     }

    4. A.

    p = (int*) malloc(3, 4);
    B.

    p = (int*) malloc(3*sizeof(int));
    C.

    p = malloc(3*4*sizeof(int));
    D.

    p = (int*) malloc(3*4*sizeof(int));

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