Oct 26 2022

Question 1

Syntax of getting address of variable using pointers

Answer 1

&p

Question 2

What is declaration of Pointer

Answer 2

*p

Question 3

What is initialization of Pointer

Answer 3

p = &alpha

Question 4

int *p;
p = &x
cout&laquo_space;*p ;

what gets printed

Answer 4

The value of x

Question 4

int p;
p = &x
cout«“p”;

what gets printed

Answer 4

The value of x

Question 5

what does & do

Answer 5

Gets the address of the variable

Question 6

what does * do in pointers

Answer 6

Declaration or Dereferencing

Question 7

How is memory divided while your function is running

Answer 7

Stack , Heap , Stack

Question 8

What section can main function access in the memory

Answer 8

Main Function and Stack

Question 9

What is point of pointers

Answer 9

The main function needs pointer to access heap or file on a disk/printer/network connection/keyboard/mouse/monitor

Question 10

Heap Memory is accessed dynamically

Answer 10

Size of Memory required in the heap is decided at runtime and not compile time

Question 11

What is the difference between heap array and stack array while creation

Answer 11

The new keyword

Question 12

When you use the new keyword you must you include and what is the syntax

Answer 12

pointer

1 -> int *p ;
p = new int[5]

2-> int *p = new int[5]

Question 13

How it the effect of memory when it goes out of scope

Answer 13

Stack memory is deleted but heap memory is not deleted

Question 14

How to delete an array in Heap

Answer 14

delete []p
p = null

The sequence is imp

Question 15

What is memory leak

Answer 15

memory in the heap that you can not access any more

Question 16

how can you access the arr in the heap

Answer 16

exactly the same way as you can access the arr in stack

Question 16

What address does the pointer have when it is pointing to the array how can you access the arr in the heap

Answer 16

the zero index

Question 17

what does p++ mean and how much does the pointer move by

Answer 17

p++ means move to the next index address and move by the number of bytes that is occupied by one element

Question 18

What 5 arithematic operations can pointers perform and why cant you do other operations

Answer 18

p++
p–
p= p + constant
p = p - constant
d = q - p / 2 where q and p are pointers
beacuse they dont make sense

Question 19

What can be potential errors using pointers

Answer 19

Uninitialized Pointer
Memory Leak
Dangling Pointer

Question 20

Explain Dangling Modifier Problem that can be caused by pointers

Answer 20

Pointer was initialized (p), then another was initialized ( x) to same address ,arr was deleted using x and now you are trying to access y

Question 21

Why is Java called a managed Language

Answer 21

They dont have pointers and JVM deals with the problems that might be caused by pointers