DAE | CIT-113

INTRODUCTION TO COMPTER PROGRAMMING

CHAPTER : 09

DIPLOMA OF ASSOCIATE ENGINEERING

EXAM PRAPARATION

COMMON WITH:

COMPUTER INFORMATION TECHNOLOGY

MULTIPLE CHOICE QUESTION

Chapter:09 (Pointers)

Question 1:

Which of the following does not initialize ptr to null (assuming variable declaration of a as int a=0;)?

int *ptr = &a; int *ptr = &a; – &a; int *ptr = a – a; All of the mentioned

Question 2:

Which is an indirection operator among the following?

& * -< .

Question 3:

What will be the output of the following C code?
1. #include <stdio.h>
2. void main()
3. {
4. int x = 0;
5. int *ptr = &5;
6. printf("%p\n", ptr);
7. }

5 Address of 5 Nothing Compile time error

Question 4:

Comment on the following pointer declaration:
int *ptr, p;

ptr is a pointer to integer, p is not ptr and p, both are pointers to integer ptr is a pointer to integer, p may or may not be ptr and p both are not pointers to integer

Question 5:

Comment on the following C statement.
const int *ptr;

You cannot change the value pointed by ptr You cannot change the pointer ptr itself You May or may not change the value pointed by ptr You can change the pointer as well as the value pointed by it

Question 6:

What will be the output of the following C code?
#include <stdio.h>
void main()
{
int a[3] = {1, 2, 3};
int *p = a;
printf("%p\t%p", p, a);
}

Same address is printed Different address is printed Compile time error Nothing

Question 7:

What will be the output of the following C code?
#include <stdio.h>
int main()
{
int ary[4] = {1, 2, 3, 4};
printf("%d\n", *ary);
}

1 Compile time error Some garbage value Undefined variable

Question 8:

What are the different ways to initialize an array with all elements as zero?

int array[5] = {}; int array[5] = {0}; int a = 0, b = 0, c = 0;
int array[5] = {a, b, c}; All of the mentioned

Question 9:

What is the size of *ptr in a 32-bit machine (Assuming initialization as int *ptr = 10;)?

1 2 4 8

Question 10:

What is the correct way to declare and assign a function pointer? (Assuming the function to be assigned is "int multi(int, int);")

int (*fn_ptr)(int, int) = multi; int *fn_ptr(int, int) = multi; int *fn_ptr(int, int) = &multi; none of the mentioned

Question 11:

Comment on the following C statement.
int (*a)[7];

An array “a” of pointers A pointer “a” to an array A ragged array None of the mentioned

Question 12:

Comment on the output of following code:
#include <stdio.h>
main()
{
char *p = 0;
*p = 'a';
printf("value in pointer p is %c\n", *p);
}

It will print a It will print 0 Compile time error Run time error

Question 13:

An entire array is always passed by ___ to a called function.

Call by value Call by reference Address relocation Address restructure

Question 14:

What is the ASCII value of NULL or \0.?

0 1 10 49

Question 15:

Choose the best answer.
Prior to using a pointer variable.

It should be declared It should be initialized It should be both declared and initialized None of these

Question 16:

The statement int **a;

is illegal is legal but meaningless is syntactically and semantically correct None of these

Question 17:

Which of the following is the correct way of declaring a float pointer:

float ptr; float *ptr; *float ptr; None of the above

Question 18:

Find the output of the following program.
void main()
{
char *msg = "hi";
printf(msg);
}

hi h hi followed by garbage value Error

Question 19:

What is the base data type of a pointer variable by which the memory would be allocated to it?

int float Depends upon the type of the variable to which it is pointing. unsigned int

Question 20:

{char *ptr;
char myString[] = "abcdefg";
ptr = myString;
ptr += 5;}

fg efg defg cdefg

NOTE
If you find any mistake in them, do tell in the comment, so that it can be corrected.

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INSTRUCTOR
MUHAMMAD BIN JAMEEL
BSC ENGG. CIVIL

DAE CIT-113 CH-09 MCQs