Pointers Questions and Answers
Pointers questions with answers are a crucial part of C programming preparation, often included in technical interviews and MCQ-based exams. Pointers are variables that store the memory address of other variables, making them fundamental to dynamic memory management and efficient program design. These C programming MCQ questions and answers help students understand pointer arithmetic, function pointers, arrays, and memory allocation. Commonly asked in placement exams by TCS, Infosys, and Wipro, mastering pointer concepts gives you a competitive edge in coding tests and programming interviews.
Pointers
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217 questions
201. Find the output void main ( ) { int a=5, b=7; int *p; p=&a; p--; *p=10; printf("%d %d", a, b); }
- 5 7
- 5 10
- 10 7
- Garbage 7
202. What is major difference between malloc and calloc ?
- Malloc initializes it memory location with garbage but calloc initializes with 0
- Malloc memory allocation is single dimensional array equivalent and calloc memory allocation is double dimensional array equivalent
- Malloc takes only one parameter but calloc takes two parameter
- None of these
203. Find the output void main ( ) { char *s1="alpha", *s2="alpha"; if (!strcmp (s1, s2)) printf("%d", *s1+*s2); }
- 97
- 194
- Garbage
- Compilation eror
204. After we free an allocated memory block using free (), the pointer will become
- Null pointer
- Danging pointer
- Wild pointer
- Smart pointer
205. Consider the following declarations: int a[10]; int *p=a; Which amot the following is portable way to print value of pointer p?
- printf ("%u\n", *p);
- printf("%d\n", p);
- printf("%1u",p);
- printf("%p\n", (void*);
206. Find the output int man () { char *cp=NULL; { char c; cp=&c; } return 0; } After the execution of above inner block
- Pointer cp is dead
- Pointer cp is still alive and is dangling pointer
- Pointer cp is dead and again points to NULL
- Pointer cp is alive and acessing it will error.
207. Modifying the object's value pointed by dangling pointer can cause I. Change in object's value unexpectedly II. Memory corruption III. Null pointer assinment IV. Error: Constant object can't modidy
- Only (i) is true
- Only (iii) is true
- Both (i) and (ii) is true
- Both (ii) and (iv) is true.
208. Find the output void main ( ) { int *p, *q; p=(float *) 2000; q=(char *) 3000; printf("%d", q-p); }
- 500
- 1000
- 2000
- Compilation Error
209. Find the output void main () { int *p = (int *)50; int *q; q=p+5; printf("%c", (q-p) + 62); }
- graphic char
- char A
- Char C
- Err: illegal pointer airthametic
210. What is true about the following statement typedef int (*mass) (char*, char*); mass m1, m2;
- m1 and m2 are pointers to function that accept two char pointers and returns an int
- m1 and m2 are not defined
- mass is a function returning int whih points to two char
- Declaration error