1)#include <iostream.h> int main() { int *a, *savea, i; savea

Advertise your Business Here

Refer this Site

Login | Sign Up


	Ask Questions on ANYTHING, that arise in your Daily Life at FORUM9.COM

Categories >> Software >> Programming Languages >> C++ >> C++ General

STL Interview Questions

OOPS Interview Questions

C++ General Interview Questions

Question

1)#include <iostream.h>

int main()
{
int *a, *savea, i;

savea = a = (int *) malloc(4 * sizeof(int));

for (i=0; i<4; i++) *a++ = 10 * i;


for (i=0; i<4; i++) {
printf("%d\n", *savea);
savea += sizeof(int);
}
return 0;
}
2)#include <iostream.h>

int main()
{
int *a, *savea, i;

savea = a = (int *) malloc(4 * sizeof(int));

for (i=0; i<4; i++) *a++ = 10 * i;


for (i=0; i<4; i++) {
printf("%d\n", *savea);
savea ++;
}
return 0;
}
The output of this two programs will be different why?

Question Submitted By :: Santhoo035

I also faced this Question!!

Rank

Answer Posted By

Re: 1)#include <iostream.h> int main() { int *a, *savea, i; savea = a = (int *) malloc(4 * sizeof(int)); for (i=0; i<4; i++) *a++ = 10 * i; for (i=0; i<4; i++) { printf("%d\n", *savea); savea += sizeof(int); } return 0; } 2)#include <iostream.h> int main() { int *a, *savea, i; savea = a = (int *) malloc(4 * sizeof(int)); for (i=0; i<4; i++) *a++ = 10 * i; for (i=0; i<4; i++) { printf("%d\n", *savea); savea ++; } return 0; } The output of this two programs will be different why?

Answer
# 1

first program prints sum of saved and size of int

second one prints only the contenst of saved

Is This Answer Correct ?

0 Yes

0 No

Mahesh

Answer
# 2

The output differs due to the followinf two statements

savea+=sizeof(int)
and
savea++

savea++
=>savea=savea+1
=>savea=savea+1*(sizeof(int))


savea+=sizeof(int)
=>savea=savea+2
=>savea=savea+2*sizeof(int)

sizeof(int) is called the scalefactor of savea

Is This Answer Correct ?

0 Yes

0 No

Uma Sankar Pradhan

Question	Asked @	Answers
Other C++ General Interview Questions


What is the Difference between "printf" and "sprintf"?	iSoft	3
In a class, there is a reference or pointer of an object of another class embedded, and the memory is either allocated or assigned to the new object created for this class. In the constructor, parameters are passed to initialize the data members and the embedded object reference to get inialized. What measures or design change should be advised for proper destruction and avioding memory leaks, getting pointers dangling for the embedded object memory allocation? Please suggest.	GE	3
Can we have "Virtual Constructors"?	TCS	5
what is static function	Patni	2
What is the Difference between "vector" and "array"?	TCS	6
What is conversion constructor?	TCS	1
What is the Diffrence between a "assignment operator" and a "copy constructor"?	Wipro	2
Please post the model question paper of hal?		1
Write any small program that will compile in "C" but not in "C++"?		3
What are the different types of polymorphism?		2
Which of the Standard C++ casts can be used to perform a ?safe? downcast: a) reinterpret_cast b) dynamic_cast c) static_cast d) const_cast	Quark	1
class Foo { public: Foo(int i) { } }; class Bar : virtual Foo { public: Bar() { } }; Bar b; Referring to the above code, when the object 'b' is defined, a compiler error will occur. What action fixes the compiler error? a) Adding a virtual destructor to the class Bar b) Adding a constructor to Bar which takes an int parameter c) Adding "Foo()" to the Bar constructor d) Adding a copy constructor to the class Foo e) Adding "Foo(0)" to the Bar::Bar initializer list	Quark	1
How do you link a C++ program to C functions?		2
How to implement flags?	Symphony	1
What are the differences between public, private, and protected access?	Wipro	4
Consider a c++ template funtion template<class T> T& Add(T a, T b){return a+b ;} if this function is called as T c = Add("SAM", "SUNG"); what will happen? What is the problem in the template declaration/ How to solve the problem.	Samsung	4
How to avoid a class from instantiation?	Symphony	5
If P is the population on the first day of the year, B is the birth rate, and D is the death rate, the estimated population at the end of the year is given by the formula: The population growth rate is given by the formula: B – D Write a program that prompts the user to enter the starting population, birth and death rates, and n, the number of years. The program should then calculate and print the estimated population after n years. Your program must have at least the following functions: 1. growthRate: This function takes its parameters the birth and death rates, and it returns the population growth rate. 2. estimatedPopulation: This function takes its parameters the current population, population growth rate, and n, the number of years. It returns the estimated population after n years Your program should not accept a negative birth rate, negative death rate, or a population less than 2.		1
Difference between Top down and bottom up approaches for a given project ?	HP	1
In C++ cout is: a) object b) class c) something else	Lehman-Brothers	10

For more C++ General Interview Questions Click Here


Copyright Policy \| Terms of Service \| Help \| Site Map 1 \| Articles \| Site Map \| Site Map \| Contact Us \|

Copyright © 2007 ALLInterview.com. All Rights Reserved.

ALLInterview.com :: Forum9.com :: KalAajKal.com