Free C++ Institute CPP Exam Dumps Questions & Answers

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
void myfunction(int i) {
cout << " " << i;
}
void multiply (int a) {
a*2;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t+10);
for_each(v1.begin(), v1.end(), multiply);
iter_swap(v1.begin(),t+9);
for_each(v1.begin(), v1.end(), myfunction);
return 0;
}
Program outputs:

• A.compilation error
• B.10 5 9 6 2 4 7 8 3 1
• C.1 2 3 4 5 6 7 8 9 10
• D.1 5 9 6 2 4 7 8 3 1
• E.10 9 8 7 6 5 4 3 2 1

What happens when you attempt to compile and run the following code?
#include <vector>
#include <iostream>
#include <algorithm>
#include <functional>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t1[]={3,2,4,1,5};
int t2[]={6,10,8,7,9};
vector<int> v1(5);
transform(t1,t1+5,t2,v1.rbegin(), plus<int>());
for_each(v1.rbegin(), v1.rend(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:

• A.9 12 12 8 14
• B.compilation error
• C.3 2 4 1 5 6 10 8 7 9
• D.1 2 3 4 5 6 7 8 9 10
• E.14 8 12 12 9

What happens when you attempt to compile and run the following code?
#include <deque>
#include <vector>
#include <iostream>
using namespace std;
template<typename T>
int calculate(T start, T end)
{
int s = 0;
while (start != end)
s+= *start; start++;return s;
}
int main ()
{
int t[] = {1, 2 ,3 ,4 ,5, 6 , 7, 8 , 9, 10};
vector<int>v1(t, t+5);
deque<int>d1(t+5, t+10);
cout<<calculate(t,t+10)<<" ";
cout<<calculate(v1.begin()+1,v1.end()?2)<<" ";
cout<<calculate(d1.rbegin()+1,d1.rend()?2)<<" ";
cout<<calculate(t[0],t[10])<<" ";
cout<<endl;
return 0;
}

• A.compilation error
• B.program outputs 55 5 17 55
• C.program outputs 55 5 17 0
• D.runtime exception

What will happen when you attempt to compile and run the code below, assuming that file test.in contains the following sequence: 1 2 3?
#include <iostream>
#include <fstream>
#include <string>
#include <list>
#include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) {out<<val<<" "; } };
int main () {
ifstream f("test.in");
list<int> l;
for( ; !f.fail() ; ) {
int i;
f>>i;
l.push_back(i);
}
f.close();
for_each(l.begin(), l.end(), Out<int>(cout));
return 0;
}
Programwill output:

• A.1 2 3 3
• B.no output
• C.compilation error
• D.program runs forever without output
• E.1 2 3

What happens when you attempt to compile and run the following code?
# include <vector>
# include <iostream>
# include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t1[]={3,2,4,1,5};
int t2[]={5,6,8,2,1};
vector<int> v1(10);
sort(t1, t1+5);
sort(t2, t2+5);
set_union(t1,t1+5,t2,t2+5,v1.begin());
for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:

• A.1 2 3 4 5 6 8 2 1 0
• B.1 1 2 2 3 4 5 5 6 8
• C.compilation error
• D.3 2 4 1 5 6 8 2 1 0
• E.1 2 3 4 5 6 8 0 0 0