C++ miscellaneous MCQ question and answer with solution | C++ Programimg MCQs

What will be the output of the following C++ code?

#include <iostream>  
#include <algorithm> 
#include <vector> 
 
using namespace std;
 
bool IsOdd (int i) 
{ 
	return (i%2)==1; 
}
 
int main () 
{
  vector<int> v;
 
  for (int i=1; i<=10; ++i) 
  	v.push_back(i);
 
  vector<int>::iterator bound;
  bound = partition (v.begin(), v.end(), IsOdd);
 
  for (vector<int>::iterator it=v.begin(); it!=bound; ++it)
    cout << ' ' << *it;
  cout << '\n';
 
  for (vector<int>::iterator it=bound; it!=v.end(); ++it)
    cout << ' ' << *it;
  cout << '\n';
 
  return 0;
}

Which of the following is correct about the second parameter of the main function?

What will be the output of the following C++ code?

#include <iostream>
#include <complex>
using namespace std;
int main()
{
	complex <double> cn(3.0, 5.0);
	cout<<"Complex number with magnitude "<<abs(cn)<<" 
        and phase angle "<<arg(cn)<<" is: 
        "<<polar(abs(cn), arg(cn))<<endl;
	return 0;
}

How many types of container classes are there in c++?

What will be the output of the following C++ code?

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
bool IsOdd (int i) 
{
    return (i % 2) == 1; 
}
int main () 
{
    vector<int> myvector;
    for (int i = 1; i < 10; ++i) myvector.push_back(i);
    vector<int> :: iterator bound;
    bound = partition (myvector.begin(), myvector.end(), IsOdd);
    for (vector<int> :: iterator it = myvector.begin(); it != bound; ++it)
        cout << ' ' << *it;
    return 0;
}

Which header file is required to use complex class in your program?

What will be the output of the following C++ code?

#include <cstdlib>
#include <iostream>
using namespace std;
int main()
{
    int ran = rand();
    cout << ran << endl;
}

Which of the following is correct about shift() and cshift()?
1. shift() makes some values of Valarray equal to 0 after shifting by a non-zero number
2. cshift() makes some values of Valarray equal to 0 after shifting by a non-zero number

What kind of object is modifying sequence algorithm?

What will be the output of the following C++ code?

#include <iostream>
using namespace std;
int main ()
{
    int n;
    n = -77;
    cout.width(4); 
    cout << internal << n << endl;
    return 0;
}