C-Pointers Question and Answer

C-Pointers Question and Answer
131. Find the output
void main ( )
{
int i=4, j=-3;
mul (&i, j);
printf ("%d %d", i, j);
}
mu1 (int *a, int b)
{
*a=*a **a;
b=b*b;
}
  • 4 3
  • 4 9
  • 16 -3
  • None of these
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132. Find the out
#include "studio.h"
void main ( )
{
printf ("%d %d"),
sizeof (NULL), sizeof (" "));
}

  • 0 0
  • 1 1
  • 2 1
  • 1 2
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133. Where can pointers be used
I. Dynamic memory allocation'
II. Call by reference
III. Implementing trees
IV. Accessing string elements

  • only I & II
  • only III &IV
  • I, II &IV
  • All of these
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134. What is the size of pointer if memory model is compact in Turbo C?
  • 1 byte
  • 2 byte
  • 4 byte
  • None of these
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135. Find the output
void main ( )
{
int a=5, *p=&a;
a=XXX (&p);
printf ("%d %d", a, *p);
}
XXX (int **p)
{
int b= **p***p;
}

  • 25 25
  • 5 65524
  • Garbage value
  • Compilation eror
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136. The poitner which is created in data segment and holds the address within data segment is  known as:
  • Near pointer
  • Bad pointer
  • Smart pointer
  • None of these
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137. What is the difference between ++*p and *p++?
  • In both cases pointers are incremented.
  • In both cases values are incremented.
  • In first case value is incremented and in second case pointer is incremented.
  • In first case pointers is incremented and in second case value is incremented.
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138. EP_SEG( ), FP_OFF ( ) are declared in which header file ?

  • sys.h
  • dos.h
  • stdio.h
  • offset.h
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139. What is the formula to find real address ?
  • segment address *16+offset address
  • Segment address+offset address *16
  • Segment address*10+offset address
  • Segment address+ofset address*10
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140. What happens when far address is incremented ?
  • Only segment address is incremented.
  • Only offset address is incremented.
  • Both segment and offset address are incremented.
  • None of these
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