MCQ Tutorial - Linux->Memory

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1.) What is the output of this program?
   #include
   #include

   int main()
   {
       int ret;
       int *ptr;
       ptr = (int *)malloc(sizeof(int)*10);
       free(ptr);
       free(ptr);
       return 0;
   }

Options are:

A.) None of the mentioned options

B.) Undefined behaviour

C.) It will print nothing

D.) It will give segmentaion fault

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2.) This program will allocate the memory of ___ bytes for pointer "ptr".

   #include
   #include

   int main()
   {
       int *ptr;
       ptr = (int*)malloc(sizeof(int)*4);
       ptr = realloc(ptr,sizeof(int)*2);
       return 0;
   }

Options are:

A.) 8

B.) None of the mentioned options

C.) 2

D.) 4

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3.) In this program the two printed memory locations has the difference of ___ bytes.

   #include
   #include

   int main()
   {
       int *ptr;
       ptr = (int*)malloc(sizeof(int)*2);
       printf("%p
",ptr);
       printf("%p
",ptr+1);
       return 0;
   }

Options are:

A.) None of the mentioned options

B.) 4

C.) 1

D.) Can not be determined

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4.) What is the output of this program?

   #include
   #include
   #include

   int main()
   {
       char *ptr;
       memcpy(ptr,"MCQTutorial",11);
       printf("%s
",ptr);
       return 0;
   }

Options are:

A.) None of the mentioned options

B.) Segmentation fault

C.) MCQTutorial

D.) Syntax error

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5.) Which one of the following in true about this program?

   #include
   #include
   #include

   int main()
   {
       char *ptr;
       printf("%p
",ptr);
       ptr = (char *)malloc(sizeof(char));
       printf("%p
",ptr);
       return 0;
   }

Options are:

A.) This program will give segmentation fault

B.) This program has some syntax error

C.) None of the mentioned options

D.) This program will print two same values

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