C Objective Questions And Answers Page 9 of 10

Question: 161

#include <stdio.h>

int main()
{
int a = 0, b=1,c=2,d;

d = ++a || b++ && c++ && a++;

printf("%d %d %d %d", a,b,c,d);

return 0;
}

(A) 2 2 3 1
(B) 2 2 3 0
(C) 3 2 3 0
(D) 1 1 2 1

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Level: Expert Category: operators

Question: 162

If the size of the array is less than the number of initializers
then

(A) Generates an error message
(B) Extra values are being ignored
(C) Size of Array is increased
(D) Size is neglected when values are given

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Level: Beginner Category: arrays

Question: 163

Pointers can be created of following data types?

(A) character
(B) integer
(C) Unsigned character
(D) All of these

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Level: Beginner Category: pointers

Question: 164

Point out the wrong statement about malloc

(A) Allocated memory has undefined value
(B) It returns pointer to the allocated space
(C) Pointer is NULL if memory is not allcoated
(D) It doesn't lead to memory leak if memory is not de allocated

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Level: Beginner Category: malloc_free

Question: 165

int **ptr;

(A) ptr is not a pointer
(B) ptr is a pointer to pointer
(C) Such statement no allowed in C
(D) None of these

C Compiler IDE
Level: Beginner Category: pointers

Question: 166

//If system architecture is 64 bits
#include "stdio.h"

int main(){

int *ptr = NULL;

printf("%d",sizeof(ptr));

return 0;
}

(A) 2
(B) 4
(C) 8
(D) 0

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Level: Beginner Category: pointers

Question: 167

What is the output of the program?
#include <stdio.h>

int main()
{
for(i=3;i<15;i++);
printf("%d",i); return 0; }

(A) 3
(B) 15
(C) 16
(D) Compilation error

C Compiler IDE
Level: Beginner Category: loops

Question: 168

Find the output of below code -

#include <stdio.h>

struct cppbuzz{
    
};

int main()
{
    printf("%d",sizeof(struct cppbuzz));
    return 0;
}

(A) 0
(B) 1
(C) 2
(D) 4

C Compiler IDE
Level: Practionar Category: structure

Question: 169

Find the output of below code -

#include <stdio.h>

struct cppbuzz{
    struct xyz{
        
    };
};

int main()
{
    printf("%d",sizeof(struct cppbuzz));
    return 0;
}

(A) Compilation Error
(B) 0
(C) 1
(D) 2

C Compiler IDE
Level: Practionar Category: structure

Question: 170

In C programming it is not mandatory to typecast pointer return by malloc() function

(A) True
(B) False

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Level: Beginner Category: malloc_free

Question: 171

Find output of below C program

#include <stdio.h>

int main()
{
   char *_ptr;
   *_ptr = malloc(10);
   *_ptr = 999;
   printf("%d",*_ptr);
    return 0;
}

(A) 999
(B) 10
(C) 0
(D) Segmentation fault

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Level: Expert Category: malloc_free

Question: 172

#include <stdio.h>

int main()
{
   char *_ptr = malloc(100);
   strcpy(_ptr, "cppbuzz");
   memset(_ptr, NULL, sizeof(_ptr));
   if(*_ptr == NULL)
   printf("NULL");
   else
   printf("%s",_ptr);
return 0;
}

(A) NULL
(B) cppbuzz
(C) Nothing is printed
(D) Typecasting Error

C Compiler IDE
Level: Expert Category: malloc_free

Question: 173

#include "stdio.h"

int main()
{
   char *_ptr = malloc(100);
   if(_ptr!=NULL)
   free(_ptr);
   
   free(_ptr);
return 0;
}

(A) Program runs smoothly
(B) Compilation Error
(C) Runtime Error- Program crashes

C Compiler IDE
Level: Expert Category: malloc_free

Question: 174

Freeing memory using free() does not set the pointer to NULL

(A) True
(B) False

C Compiler IDE
Level: Practionar Category: malloc_free

Question: 175

#include <stdio.h>

int main()
{
   char *_ptr = malloc(100);
   if(_ptr!=NULL)
   free(_ptr);
  _ptr=NULL;
   free(_ptr);
   return 0;
}

(A) Program runs smoothly & nothing is printed
(B) Runtime Error : Crash
(C) Compilation Error
(D) None of these

C Compiler IDE
Level: Practionar Category: malloc_free

Question: 176

#include <stdio.h>

int main()
{
	char *_ptr = malloc(1);
	_ptr = malloc(1);
	free(_ptr);
	return 0;
}

(A) Program runs smoothly
(B) Compilation Error
(C) Program runs smoothly but has memory leak
(D) Runtime Error : Crash

C Compiler IDE
Level: Practionar Category: malloc_free

Question: 177

How malloc() behaves if we passes 0 in argument?

#include <stdio.h>

int main()
{
char *_ptr = malloc(0);
free(_ptr);
return 0;
}

(A) Compilation Error
(B) Runtime Error: Crash
(C) Program runs smoothly but has memory leak
(D) Program runs smoothly & nothing is printed

C Compiler IDE
Level: Practionar Category: malloc_free

Question: 178

#include <stdio.h>

int main()
{
   char * _ptr = NULL; 
   _ptr = malloc(0);
   if(_ptr==NULL) printf("_ptr is NULL");
   else printf("_ptr not NULL");
   printf(" %p ", _ptr);
   *_ptr = '@';
   printf(" %c ", *_ptr);
   free(_ptr);
   return 0;
}

(A) _ptr is NULL 0x21f3010 @
(B) _ptr not NULL 0x21f3010 @
(C) Runtime Error: Segmentation Fault
(D) _ptr not NULL 0x21f3010

C Compiler IDE
Level: Expert Category: malloc_free

Question: 179

//Assume that this code is running on 64 bit system

#include <stdio.h>

enum Xenum{
    C, CPP, Java
};

int main()
{
enum Xenum var;
printf("%d",sizeof(var));
return 0;

}

(A) 1
(B) 3
(C) 4
(D) 12

C Compiler IDE
Level: Beginner Category: enum

Question: 180

Can we have enum containing enum with same contestant?

#include "stdio.h"

enum Yenum{
       C, CPP, Java
};

enum Xenum{
    C, CPP, Java, Yenum
};

int main()
{
  enum Xenum var;
  printf("%d",sizeof(var));
  return 0;
}

(A) Enum can contain enum but duplicate contestants are not allowed
(B) Enum can't contain enum
(C) Enum can contain enum but not accessible
(D) This code will produce compilation error

C Compiler IDE
Level: Beginner Category: enum

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