Advanced C++ | Summary Test

Advanced C++ | Summary Test

  1. What happens if you try to compile and run this program?

    #include <iostream>
#include <set>
#include <vector>
using namespace std;
int
main()
{
  int mynumbers[] ={8, 9, 7, 6, 4, 1, 6};
  multiset <int> s1 (mynumbers, mynumbers + 6); //LINE  I
  s1.insert (s1.find (9),5);  //LINE II
  for(multiset <int> :: iterator i = s1.begin(); i != s1.end(); i++)
     cout << *i <<", ";
  return 0;
}
    • program outputs 1, 4, 5, 6, 7, 8,
    • runtime error at LINE I
    • program outputs: 1, 4, 5, 6, 7, 8, 9,
    • program outputs: 1, 4, 5, 6, 6, 7, 8, 9,
    • compilation error in LINE II
    • compilation error in LINE I

  2. What will happen when you attempt to compile and run the following code?

    #include <vector>
#include <iostream>
#include<algorithm>>
using namespace std;
void
printer (int i)
{
  cout << i <<", ";
}
int
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 1, 4, 5};
  vector <int> v1 (12);
  vector <int> v2 (7);
  sort (mynumbers1, mynumbers1 + 4);
  copy (mynumbers1, mynumbers1 + 4, v1.begin());
  sort (mynumbers2, mynumbers2 + 4);
  copy (mynumbers2, mynumbers2 + 4, v1.begin() + 5); //LINE I
  sort (v1.begin(), v1.end());
  merge (v1.begin() + 4, v1.begin() + 7, v1.begin() + 5,v1.begin() + 8, v2.begin()); //LINE II
  for_each (v2.begin(), v2.end(), printer);
  return 0;
}
    • the program outputs 0, 1, 1, 2, 2, 3,
    • the program outputs 0, 0, 0, 1, 1, 2, 2,
    • the program outputs 0, 1, 1, 2, 2, 3, 0,
    • compilation error in LINE II
    • compilation error in LINE I

  3. What will happen when you attempt to compile and run the following code?

    #include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
void 
printer(int i)
{
  cout << i <<", ";
}
int 
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 1, 4, 5};
  vector <int> v1 (6);
  sort (mynumbers2, mynumbers2 + 4);
  sort (mynumbers1, mynumbers1 + 4);  //LINE I
  merge (mynumbers1, mynumbers1 + 2, mynumbers2, mynumbers2 + 2, v1.begin());  //LINE II
  for_each (v1.begin(), v1.end(), printer);
  return 0;
}
    • the program outputs 3, 9, 0, 6, 1, 4,
    • the program outputs 0, 1, 2, 4,
    • compilation error in LINE II
    • the program outputs 0, 1, 2, 4, 0, 0,
    • compilation error in LINE  I

  4.  What will happen when you attempt to compile and run the following code? Choose all that apply:

    #include <vector> 
#include <iostream> 
#include <algorithm> 
using namespace std;
void
printer (double i)
{
  cout << i << ", ";
}
bool
compare (double a, double b)
{
  return int (a) < int (b);
}
int 
main()
{
  double mynumbers[] = {1.11, 3.13, 2.12, 5.15, 6.16};
  vector<double> v1(mynumbers, mynumbers + 5);
  stable_sort (v1.begin(), v1.end(), compare);  //LINE I
  remove (v1.begin(), v1.end(), 5.15);  //LINE II
  for_each (v1.begin(), v1.end(), printer);
  return 0;
}
    • size of v1 vector is 5
    • the program outputs 1.11, 2.12, 3.13, 6.16, 6.16,
    • the program outputs 1.11, 3.13, 2.12, 6.16, 6.16,
    • the program outputs 1.11, 3.13, 2.12, 6.16,
    • size of v1 vector is 6
    • compilation error in LINE II
    • compilation error in LINE I

  5. What will happen when you attempt to compile and run the following code?

    #include
#include
using namespace std;
template ostream & print(T & start, T & end)
{
  for(; start != end; ++start)
      cout << *start <<" ";
  return cout;
}
int main()
{
  int tab[] = {8, 7, 6, 4, 2, 1};
  deque d1(tab, tab + 6);
  deque d2;
  deque :: iterator it;
  for(it = d1.begin(); it != d1.end(); ++it)
  {
    d2.push_back(d1[d1.end() - it -1]);  //LINE I
  }
  print(d2.rbegin(), d2.rend()) << endl;  //LINE II
  return 0;
}
    • compilation error in LINE I
    • program outputs: 1,8,
    • program outputs: 8,7,6,4,2,1
    • program outputs: 1,2,4,6,7,8,
    • compilation error in LINE II
    • runtime error in LINE I

  6. What will happen when you attempt to compile and run the following code?

    #include <iomanip>
#include <iostream>
using namespace std;
int
main()
{
  double goodpi = 3.141593;
  double badpi = 3.5;
  cout << goodpi << ", ";
  cout << scientific;   //LINE I
  cout << setprecision(4);  //LINE II
  cout.unsetf(ios::floatfield);
  cout << goodpi << ", ";
  cout << badpi << ", ";
  return 0;
}
    • the program outputs 3.141593, 3.14159, 3.5,
    • compilation error in LINE II
    • compilation error in LINE I
    • the program outputs 3.14159, 3.142, 3.5,
    • the program outputs 3.14159, 3.142e+000, 3.5,

  7. Which of the following examples shows the proper way to create a new priority_queue container assuming all necessary declarations has been performed. Choose all that apply:

    • queue q; ;;;;
    • list_queue 1; priority_queue q(1); ;;;;
    • deque d; priority_queue q(d.begin(), d.end()); ;;;;
    • deque d; priority_queue q(d);
    • vector v; priority_queue q(v); ;;;;

  8. What will happen when you attempt to compile and run the following code?

    #include <vector> 
#include <iostream> 
#include <algorithm> 
using namespace std; 
void 
printer (int i) 
{ 
   cout << i << ", "; 
}
int
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 2, 4, 5};
  vector <int> v1(2);
  sort (mynumbers2, mynumbers2 + 4);
  sort (mynumbers1, mynumbers1 + 4);  //LINE I
  set_intersection (mynumbers1, mynumbers1 + 3, mynumbers2, mynumbers2 + 2, v1.begin());  //LINE II
  for_each (v1.begin(), v1.end(), printer);
  return 0;
}
    • the program outputs 2,
    • runtime error at LINE II
    • the program outputs 2, 2,
    • compilation error at LINE I
    • the program outputs 2, 0,
    • compilation error at LINE II

  9. What will happen when you attempt to compile and run the following code?

    #include <iostream> 
#include <algorithm> 
#include <vector> 
using namespace std; 
struct compare
{
  bool operator () (int a)
  {
    return (a > 0);
  }                    //LINE I
  operator int () const
  {
    return (4);
  }                    //LINE II
};
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1, 4, 4, 9, 7, 2};
  vector <int> v (mynumbers, mynumbers + 11);
  int count = std::count(v.begin(), v.end(), compare());  //LINE III
  cout << count << endl;
  return 0;
}
    • compilation error in LINE I
    • the program outputs 4
    • compilation error in LINE II
    • the program outputs 3
    • compilation error in LINE III
    • runtime error at LINE III
    • the program outputs 1

  10. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 6 5 7<enter> ?

    #include <iostream> 
#include <string> 
using namespace std; 
int
main()
{
  string s;
  cin >> s;   //LINE I
  cout <<s<<", "<<s<<", "<<endl;  //LINE II
  return 0;
}
    • compilation error in LINE II
    • compilation error in LINE I
    • the program outputs 6, 6,
    • the program outputs 6 5 7, 6 5 7,
    • the program outputs 6, 5, 7, 6, 5, 7,

  11. What happens if you try to compile and run this program?

    #include <iostream> 
#include <set> 
#include <vector> 
using namespace std; 
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4,  1,6};
  multiset <int> s1 (mynumbers, mynumbers + 6);  //LINE I
  s1.insert (s1.find(9), 5);  //LINE II
  for(multiset <int>::iterator i = s1.begin(); i != s1.end(); i++)
     cout << *i <<", ";
  return 0;
}
    • compilation error in LINE I
    • program outputs: 1, 4, 5, 6, 6, 7, 8, 9,
    • runtime error at LINE I
    • program outputs: 1, 4, 5, 6, 7, 8, 9,
    • program outputs: 1, 4, 5, 6, 7, 8,
    • compilation error in LINE II

  12. What happens when you attempt to compile and run the following code?

    #include <iostream> 
#include <set> 
#include <vector> 
using namespace std; 

int 
main()
{
  int mynumbers[] = { 8, 9, 7, 6, 4, 1, 2 };
  vector <int> v (mynumbers, mynumbers + 6);
  multiset <int> s1 (v.begin() , v.end());
  s1.insert (v.begin(), v.end());
  s1.insert (v.begin(), v.end());  //LINE I
  pair <multiset <int>::iterator, multiset <int>::iterator> range;
  range = s1.equal_range(6);
  while(range.first != range.second)
  {
    cout << *range.first <<", ";  //LINE II
    range.first++;
  }
 return 0;
}
    •  runtime error at LINE I
    • compilation error in LINE I
    • compilation error in LINE II
    • the program outputs 6, 6, 6, 6, 
    • the program outputs 6, 6, 6,
    • the program outputs 6, 4, 1, 2,
    • runtime error at LINE II

  13. What happen when you attempt to compile and run the following code? Choose all that apply:

    #include <vector> 
#include <iostream> 
#include <algorithm> 
using namespace std; 

void
printer(double i)
{
  cout <<i<<", ";
}
bool
compare (double a, double b)
{
  return int (a) < int (b);
}
int
main()
{
  double mynumbers[] = { 1.11, 3.13, 2.12, 5.15, 6.16};
  vector <double> v1 (mynumbers, mynumbers + 5);
  stable_sort (v1.begin(), v1.end(), compare);  //LINE I
  remove (v1.begin(), v1.end(), 5.15);  //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • size of v1 vector is 5
    • the program outputs 1.11, 3.13, 2.12, 6.16,
    • compilation error in LINE II
    • compilation error in LINE I
    • size of v1 vector is 6
    • the program outputs 1.11, 3.13, 2.12, 6.16, 6.16,
    • the program outputs 1.11, 2.12, 3.13, 6.16, 6.16,

  14. What will happen when you attempt to compile and run the following code?

    #include 
#include 
using namespace std;
template ostream & print(T & start, T & end)
{
  for(; start != end; ++start)
      cout <<*start <<" ";
  return cout;
}
int main()
{
  int tab[] = {8, 7, 6, 4, 2, 1};
  deque d1(tab, tab+6);
  deque d2;
  deque::iterator it;
  for(it = d1.begin(); it != d1.end(); ++it)
  {
       d2.push_back(d1[d1.end() - it -1]);  //LINE I
  }
  print(d2.rbegin(), d2.rend()) <<endl;  //LINE II
  return 0;
}
    • program outputs: 8, 7, 6, 4, 2, 1
    • compilation error in LINE I
    • program outputs: 1, 2, 4, 6, 7, 8
    • compilation error in LINE II
    • program outputs: 1, 8
    • runtime error at LINE I

  15. What will happen when you attempt to compile and run the following code?

    #include <iostream> 
#include <set> 
#include<vector>
#include <functional> 
using namespace std; 
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1};
  vector <int> v (mynumbers, mynumbers + 6);
  multiset <int> s1 (v.begin(), v.end());
  multiset <int, greater_equal <int>> s2 (v.begin(), v.end());  //LINE I
  s2.insert (3);    //LINE II
  for(multiset<int, greater<int>>::iterator i = s2.begin(); i != s2.end(); i++)
     cout << *i <<", ";
  cout << endl;
  return 0;
}
    • compilation error in LINE I
    • program outputs: 9, 8, 7, 6, 4, 3, 1,
    • compilation error in LINE II
    • program outputs: 9, 8, 7, 6, 4, 1,
    • program outputs: 8, 9, 7, 6, 4, 1, 3,
    • runtime error at LINE I

  16. What will happen when you attempt to compile and run the following code?

    #include <iostream> 
#include <set> 
#include <vector> 
using namespace std; 

template <class T>void
print (T start, T end)
{
  while(start != end)
    {
     std::cout << *start << ", ";
     start++;
    }
}
int
main()
{
  int mynumbers[] = { 8, 6, 4, 1};
  vector <int> v (mynumbers, mynumbers + 6);
  set <int> s (v.begin(), v.end());
  for(int i = 4; i > 0; i)
   {
      int x = *(s.begin());  //LINE I
      s.pop();               //LINE II
      v.push_back(i + x);
    }
  print(v.begin(), v.end());
  print(s.begin(), s.end());
  cout << endl;
  return 0;
}
    • program outputs: 8, 6, 4, 1, 8, 6, 4, 1,
    • program outputs: 8, 6, 4, 1, 
    • runtime error at LINE I
    • compilation error in LINE II
    • compilation error in LINE I
    • program outputs: 8, 6, 4, 1, 1, 4, 6, 8 

  17. What will happen when you attempt to compile and run the following code?

    #include <vector> 
#include <iostream> 
#include <algorithm> 
using namespace std;
int
main()
{
  int mynumbers[] = { 8, 9, 7, 6, 4, 1 };
  vector <int> v1 (mynumbers, mynumbers + 6);  //LINE I
  cout << * max_element(v1.begin(), v1.end()) <<", ";  //LINE II
  return 0;
}
    • you can call max_element function on non ordered v1 ector
    • runtime error at LINE II
    • you can’t  call max_element function on non ordered v1 ector
    • the program outputs 8, 
    • the program outputs 9, 
    • the program outputs 1, 
    • compilation error at LINE I

  18. What will happen when you attempt to compile and run the following code? Choose all that apply:

    #include <vector> 
#include <iostream> 
#include <algorithm> 
using namespace std;

template <calss T> struct Out
{
  ostream & out;
  Out(ostream & o):out (o){}
  void operator() (const T & val)
  {
    out << val <<", ";
  }
};
struct Sequence
{
  int start;
    Sequence (int start):start (start){}
    int operator()()
    {
      return 2 * (start++ % 3);
    }
 };
int
main()
{
   vector<int>v1 (3);
   vector <int> v2 (3);
   generate (v1.begin(), v1.end(), Sequence(5));  //LINE I
   sort (v1.rbegin(), v1.rend());
   unique_copy(v1.begin(), v1.end(), v2.begin());  //LINE II
   for_each (v1.begin(), v1.end(), Out<int>(cout));
   for_each (v2.begin(), v2.end(), Out<int>(cout));
   return 0;
}
    • the program outputs 4, 2, 0, 0, 2, 4, 
    • the program outputs 1, 2, 4, 1, 2, 4, 
    • you can call unique_copy function on these vector (v1, v2)
    • the program outputs 4, 2, 0, 4, 2, 0, 
    • compilation error in LINE I
    • compilation error in LINE II

  19. What will happen when you attempt to compile and run the following code?

    #include <iostream> 

using namespace std;
int
main()
{
  cout <<31<<", ";
  cout.setf(ios::hex);     //LINE I
  cout <<31<<", ";
  cout.setf(ios::showbase);  //LINE II
  cout <<63<<", ";
  return 0;
}
    • the program outputs 31, 0x1f, 0x3f, 
    • runtime error at LINE II
    • the program outputs 31, 31, 63, 
    • compilation error in LINE I
    • compilation error in LINE II
    • the program outputs 31, 1f, 0x3f, 

  20. What will happen when you attempt to compile and run the following code assuming that file input.txt contain following sequence: i j k?

    #include <iostream>
#include <string>
#include <vector>
#include<algorithm>
#include <iomanip>
#include <fstream>
using namespace std;
void
printer (char c)
{
  cout << setw(2) << c <<", ";
}
int
main()
{
  ifstream inputfile("input.txt");
  vector <char> v1;
  char c;
  do
   {
     inputfile >> c;  //LINE I
     v1.push_back (c);
    }
   while(inputfile.good());  //LINE II
   inputfile.close();
   for_each (v1.begin(), v1.end(), printer);
   return 0;
}
    • program outputs: i, j, k,  (one space after commas)
    • compilation error in LINE I
    • program outputs: i, j, k, k,  (one space after commas)
    • program runs forever without output
    • compilation error in LINE II
    • program outputs: i,  j,  k,  k,   (two space after commas)

  21. What will happen when you attempt to compile and run the following code? Choose all that apply:

    #include <vector>
#include <iostream>

int
main()
{
    std::vector < int >v1;
    v1.push_back(17);       //LINE I
    std::cout<<v1.front ()<<", " <<v1.back() << std::endl;   //LINE II
    return 0;
}
    • program outputs: 0, 0,
    • code compiles and executes successfully
    • compilation error in LINE II
    • compilation error in LINE I
    • program outputs: 17, 17,
    • program outputs: 0, 17,

  22. What will happen when you attempt to compile and run the following code?

    #include<deque>
#include <iostream>
#include <algorithm>

using namespace std;
class Pocket
{
  int value;
public:
  Pocket (int value):value(value){}
  int getValue() const
  {
    return value;
  }
  bool operator < (const Pocket & _Right) const
  {
    return value < _Right.value;
  }
};
ostream & operator << (ostream & stream, const Pocket & pocket)
{
  stream << pocket.getValue();
  return stream;
}
void
printer (Pocket i)
{
  cout << i << ", ";
}
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1 };
  deque <Pocket> d1 (mynumbers, mynumbers + 6);
  sort (d1.begin(), d1.end());
  d1.push_back(3);    //LINE I
  pair <deque <Pocket>::iterator, deque<Pocket>::iterator> result = equal_range(d1.begin(), d1.end(), Pocket(4));  //LINE II
  for_each(result.first, result.second, printer);
  return 0;
}
    • runtime error at LINE I
    • the program outputs 3, 
    • compilation error in LINE I
    • runtime error at LINE II
    • compilation error in LINE II
    • the program outputs 3, 4, 
    • the program outputs 4,  

  23. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <algorithm>
#include<vector>
#include <set>

using namespace std;
void
printer(int i)
{
  cout << i << ", ";
}
struct sequence
{
  int val, inc;
public:
  sequence(int s, int i):val(s), inc(i){}
  operator int() const
  {                  //LINE I
    int r = val;
        return r;
  }
};
int
main()
{
  vector <int> v1(5);
  fill(v1.begin(), v1.end(), sequence(2, 4));   //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • runtime error at LINE II
    • the program outputs2, 2, 2, 2, 2, 
    • the program outputs2, 4, 2, 4, 2, 
    • the program outputs2, 3, 4, 2, 3, 
    • compilation error in LINE II
    • compilation error in LINE I

  24. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 6  5 7<enter>?

    #include <iostream>
#include <string>
using namespace std;
int
main()
{
  string s;
  cin >> s;      //LINE I
  cout << s << ", " << s << ", " << endl;   //LINE II
  return 0;
}
    • compilation error in LINE II
    • the program outputs 6, 6, 
    • the program outputs 6 5 7, 6 5 7,
    • the program outputs 6, 5, 7, 6, 5, 7,
    • compilation error in LINE I

  25. What will happen when you attempt to compile and run the following code?

    #include<vector>
#include <iostream>
#include <algorithm>

using namespace std;
void
printer (int i)
{
  cout << i <<", ";
}
int 
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 2, 4, 5};
  vector<int> v1 (2);
  sort (mynumbers2, mynumbers2 + 4);
  sort (mynumbers1, mynumbers1 + 4);   //LINE I
  set_intersection (mynumbers1, mynumbers1 + 3,  mynumbers2,  mynumbers2 + 2, v1.begin());   //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • compilation error in LINE II
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs 2, 2, 
    • the program outputs 2, 0, 
    • the program outputs 2, 

  26. What will happen when you attempt to compile and run the following code?

    #include<iomanip>
#include <iostream>

using namespace std;
int
main()
{
  double goodpi = 3.141593;
  double badpi = 3.5;
  cout << goodpi <<", ";
  cout << scientific;   //LINE I
  cout << setprecision(4);  //LINE II
  cout.unsetf (ios::floatfield);
  cout << goodpi <<", ";
  cout << badpi <<", ";
  return 0;
}
    • the program outputs 3.14159, 3.142, 3.5, 
    • compilation error in LINE I
    • the program outputs 3.14159, 3.14159, 3.5, 
    • the program outputs 3.14159, 3.142e+000, 3.5, 
    • compilation error in LINE II

  27. What will happen when you attempt to compile and run the following code?

    #include<deque>
#include <iostream>
#include <algorithm>

using namespace std;
class Pocket
{
  int value;
public:
  Pocket (int value):value(value){}
  int getvalue() const
  {
    return value;
  }
  bool operator < (const Pocket & _Right) const
  {
    return value < _Right.value;
  }
};
ostream & operator << (ostream & stream, const Pocket & pocket)
 {
   stream << pocket.getvalue();
   return stream;
 }
void
printer (Pocket i)
{
  cout << i << ", ";
}
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1 };
  deque <Pocket> d1 (mynumbers, mynumbers + 6);
  sort (d1.begin(), d1.end());
  d1.push_back(3); //LINE I
  pair <deque <Pocket>::iterator, deque<Pocket>::iterator> result = equal_range(d1.begin(), d1.end(), Pocket(4)); //LINE II
  for_each(result.first, result.second, printer);
  return 0;
}
    • the program outputs 4,
    • runtime error at LINE II
    • runtime error at LINE I
    • compilation error in LINE I
    • compilation error in LINE I
    • the program outputs 3,
    • the program outputs 3, 4,

  28. Which container class can be be used an underlying container for stack. Choose all that apply:

    • multimap
    • deque;;;;
    • vector;;;;
    • set;;;;
    • list;;;;

  29. What will happen when you attempt to compile and run the following code?

    #include<vector>
#include <iostream>
#include <algorithm>
#include <functional>

using namespace std;
class Pocket
{
  int value;
public:
  Pocket (int value):value(value){}
  int getValue() const
  {
    return value;
  }
  bool operator > (const Pocket & _Right) const
  {
    return value < _Right.value;
  }
};
ostream & operator << ( ostream & stream, const Pocket & pocket)
{
   stream << pocket.getvalue();
   return stream;
}
void
printer (Pocket i)
{
  cout << i << ", ";
}
int
main()
{
  int mynumbers[] = {9, 7, 6, 4, 1 }; 
  vector <Pocket> s1 (mynumbers, mynumbers + 5); //LINE I
  sort (s1.begin(), s1.end(),greater<Pocket>());  //LINE II
  for_each(s1.begin (), s1.end (), printer);
  return 0;
}
    • the program outputs 9, 7, 6, 4, 1,
    • compilation error in LINE II
    • the program outputs 4, 6, 7, 9,
    • compilation error in LINE I
    • the program outputs 1, 4, 6, 7, 9,

  30. What will happen when you attempt to compile and run the following code? Choose all that apply:

    #include<vector> 
#include<set> 
#include <iostream> 
#include <algorithm> 

using namespace std;
void
printer(int i)
{
  cout <<i<<", ";
}
int 
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1};
  vector <int> v1(mynumbers, mynumbers + 6);
  sort (v1.begin(), v1.end(), greater <int>());   //LINE I
  for_each(v1.begin(), v1.end(), printer);  //LINE II
  return 0;
}
    • the program outputs 9, 8, 7, 6, 4,
    • the program outputs 1, 4, 6, 7, 8, 9, 
    • you can call sort function on v1 vector
    • compilation error in LINE I
    • compilation error in LINE II
    • the program outputs 9, 8, 7, 6, 4, 1, 
    • runtime error at LINE I

  31. What will happen when you attempt to compile and run the following code?

    #include<deque> 
#include <iostream> 
#include <algorithm> 

using namespace std;
void
printer(int i)
{
  cout <<i<<", ";
}
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1};
  deque <int> d1(mynumbers, mynumbers + 6);
  d1.push_back(2);   //LINE I
  sort(d1.begin(), d1.end());
  pair<deque<int>:: iterator, deque<int>:: iterator> result = equal_range (d1.begin(), d1.end(), 2);   //LINE II
  for_each(result.first, result.second, printer);
  return 0;
}
    • compilation error in LINE II
    • the program outputs 0, 
    • the program outputs 1, 2, 
    • the program outputs 2, 
    • compilation error in LINE I

  32. What will happen when you attempt to compile and run the following code?

    #include <iostream> 
#include <algorithm> 
#include <vector> 

using namespace std;
struct Compare
{
  bool operator ()(int a)
  {
    return (a > 0);
  }                        //LINE I
  operator int () const
  {
    return (4);
  }                        //LINE II
};
int 
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1, 4, 4, 9, 7, 2};
  vector<int> v (mynumbers, mynumbers + 11);
  int count = std::count(v.begin(), v.end(), Compare());   //LINE III
  cout << count << endl;
  return 0;
}
    • runtime error at LINE III
    • the program outputs 1
    • compilation error in LINE II
    • compilation error in LINE III
    • the program outputs 4
    • the program outputs 3
    • compilation error in LINE I

  33. What will happen when you attempt to compile and run the following code?

    #include <iostream> 
#include <algorithm> 
#include <vector>
#include <set> 

using namespace std;
class Pocket
{
  int a;
public:
  Pocket (int a): a(a){}
  int getA () const
  {
    return a;
  }
  void setA(int a)
  {
    this->a = a;
  }
  bool operator <(const Pocket & b) const
  {
    return a < b.a;
  }
};
class Founder
{
public:
  Pocket val;
  Founder (Pocket & v):val (v){}
  bool operator ()(Pocket & v)
  {
    return (v.getA() == val.getA());
  }
};
int
main()
{
  int mynumbers[] = {8, 9, 7, 6, 4, 1};
  vector<Pocket> v1(mynumbers, mynumbers +6);   //LINE I
  set<Pocket> s1 (mynumbers, mynumbers + 6);
  Pocket a (6);
  Founder fonderA (a);
  if(find_if(v1.begin(), v1.end(), fonderA) != v1.end())  //LINE II
    cout << "Found!, ";
  else
    cout <<"Not Found!, ";
  Pocket b (5);
  Founder founderB (b);
  if(find_if (v1.begin(), v1.end(), founderB) != v1.end())  //LINE III
    cout << "Found!";
  else 
    cout <<"Not Found!";
  return 0;
}
    • compilation error in LINE I
    • the program outputs Found!, Found!
    • the program outputs Found!, Not Found!
    • runtime error at LINE I
    • compilation error in LINE III
    • the program outputs Not Found!, Found!
    • compilation error in LINE II

  34. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <algorithm> 
#include <vector> 
#include <set> 
using namespace std;
void
printer (int i)
{
  cout<< i <<", ";
}
bool
classifier(int v)
{
  return v -4 > 0;
}
int
main()
{
  int mynumbers[] ={9, 7, 6, 4, 1};
  vector <int>v1 (mynumbers, mynumbers + 5);
  set<int>s1 (mynumbers, mynumbers + 5);
  replace_if(v1.begin(), v1.end(), classifier, 3);  //LINE I
  for_each(v1.begin(), v1.end(), printer);  //LINE II
  return 0;
}
    • the program outputs 3, 3, 3, 4, 1,
    • the program outputs 9, 7, 6, 3, 3,
    • the program outputs 9, 7, 6, 4, 1,
    • you can call replace_if function with classifier function as 3rd parameter ;;;;
    • compilation error in LINE I
    • compilation error in LINE II
    • runtime erro at LINE II

  35. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <string> 
 
using namespace std;
template <typename T> class Pocket
{
  T value;
public:
  Pocket(){}
  Pocket(T value);
  T getValue()
  {
    return value;
  }
  void add(T _Right)
  {
    value += _Right;
  }
};
template <class T> Pocket <T> ::Pocket (T value):value (value){}
int
main()
{
  Pocket<string> a("Low");
  string n ("End");
  a.add(n);   //LINE I
  cout <<a.getValue() <<a.getValue(); //LINE II
  return 0;
}
    • compilation error in LINE I
    • program outputs: LowEnd, LowEnd
    • program outputs: LowEnd LowEnd
    • program outputs: LowEndLowEnd
    • program outputs: Low EndLow End

  36. What will happen when you attempt to compile and run the following code?

    #include<vector>
#include<iostream>
#include<algorithm>
#include<functional>
using namespace std;
int
main()
{
 int mynumbers[] = {8,9,7,6,4,1};
 vector<int>v1 (mynumbers, mynumbers+ 6); //LINE I
 cout<<*max_element(v1.begin(),v1.end()) <<", "; //LINE II
 return 0;
}
    • the program outputs 8,
    • the program outputs 1,
    • you can call max_element function on non ordered v1 vector
    • you can’t call max_element function on non ordered v1 vector
    • the program outputs 9,
    • runtime error at LINE II
    • compilation error in LINE I

  37. What will happen when you attempt to compile and run the following code assuming that file input.txt contains following sequence: i j k ?

    #include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<fstream>
using namespace std;
void
printer (char c)
{
 cout <<setw(2) <<c <<", ";
}

int
main()
{
 ifstream inputfile("input.txt");
 vector <char> v1;
 char c;
 do
 {
  inputfile >> c; //LINE I
  v1.push_back(c);
 }
 while(inputfile.good()); //LINE II
 inputfile.close();
 for_each(v1.begin(), v1.end(), printer);
 return 0;
}
    • program outputs: i, j, k, (one space after commas)
    • program run forever without output
    • compilation error in LINE II
    • program outputs: i,  j,  k,  k,  (two spaces after commas)
    • program outputs: i, j, k, ,k (one space after commas)
    • compilation error in LINE I

  38. What will happen when you attempt to compile and run the following code?

    #include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

void
printer (int i)
{
  cout << i <<", ";
}

int
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 1, 4, 5};
  vector<int>v1 (12);
  vector<int>v2 (7);
  sort(mynumbers1, mynumbers1 + 4);
  copy(mynumbers1, mynumbers1 + 4, v1.begin());
  sort(mynumbers2, mynumbers2 + 4);
  copy(mynumbers2, mynumbers2 + 4, v1.begin() +5); //LINE I
  sort(v1.begin(), v1.end());
  merge(v1.begin() + 4, v1.begin() + 7, v1.begin() + 5, v1.begin() +8, v2.begin()); //LINE II
  for_each(v2.begin(), v2.end(),printer);
  return 0;
}
    • compilation error in LINE II
    • the program outputs 0, 1, 1, 2, 2, 3, 0, 
    • the program outputs 0, 0, 0, 1, 1, 2, 2, 
    • the program outputs 0, 1, 1, 2, 2, 3,
    • compilation error in LINE I

  39. What will happen when you attempt to compile and run the following code?

    #include<deque>>
#include<iostream>
#include<algorithm>
#include<set>

using namespace std;

int
main()
{
  int mynumbers1[] = {3, 9, 0, 2};
  int mynumbers2[] = {6, 1, 4, 5};
  sort(mynumbers1, mynumbers1 + 4);
  sort(mynumbers2, mynumbers2 + 4);

  deque<int>d1(mynumbers1, mynumbers1 + 3); //LINE I
  set<int>s1(mynumbers2, mynumbers2 + 3); //LINE II
  sort(d1.begin(), d1.end());

  cout << includes(s1.begin(), s1.end(), mynumbers1,
                   mynumbers1 + 2) <<", "<<includes(d1.begin(),
                                                    d1.end(),
                                                    mynumbers1,
                                                    mynumbers1 +
                                                    2) <<endl;

return 0;
}
    • compilation error in LINE I
    • runtime error at LINE II
    • compilation error in LINE II
    • the program outputs 0, 1,
    • the program outputs 1, 1,
    • the program outputs 1, 0,

  40. What will happen when you attempt to compile and run the following code?

    #include<vector>
#include<iostream>
#include<algorithm>

using namespace std;
void
printer(int v)
{
  cout<<v<<", ";
}
struct Sequence
{
  int start;
  Sequence(int start):start (start){}
  int operator() ()
  {
    return start++; //LINE I
  }
};

int
main()
{
  vector<int> v1(5);
  generate_n(v1.begin(), 5, Sequence(5)); //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • compilation error in LINE I
    • the program outputs 5, 5, 5, 5, 5,
    • compilation error in LINE II
    • the program outputs 5, 6, 7, 8, 9,
    • the program outputs 1, 2, 3, 4, 5,
    • runtime error at LINE II
Subscribe
Notify of
guest
0 Comments
Newest
Oldest Most Voted
Inline Feedbacks
View all comments