Question 1

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

#include <iostream>

using namespace std;int main()

{

cout<<true<<" "<<boolalpha<<false;

return 0;

}

Program outputs:

Options :

A : true false

B : 1 0

C : 1 false

D : true 0

E : compilation error

Answer: C

Question 2

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

#include <iostream>

#include <map>

#include <string>

using namespace std;

int main(){

int second[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 10 };

string first[] = {"three", "four", "two", "one", "six","five", "seven", "nine","eight"," ten"};

multimap<int,string> m;

for(int i=0; i<10; i++) {

m.insert(pair<int,string>(second[i],first[i]));

}

if (m[11] == "eleven") {

cout<<"eleven ";

}

for(multimap<int, string>::iterator i=m.begin();i!= m.end(); i++) {

cout<<i?>second<<" ";

}cout<<m.size();

return 0;

}

Options :

A : program outputs: one two three four five six seven eight nine ten 11

B : program outputs: one two three four five six seven eight nine ten 10

C : program outputs: eleven one two three four five six seven eight nine ten 10

D : compilation error

Answer: A

Question 3

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

#include <iostream>

#include <set>

#include <vector>

using namespace std;

int main(){

int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };

vector<int>v(t, t+10);

multiset<int> s1(v.begin(),v.end());

s1.insert(v.begin(),v.end());

pair<multiset<int>::iterator,multiset<int>::iterator> range;

range = s1.equal_range(6);

while (range.first != range.second) {

cout<<*range.first<<" "; range.first++;

}

return 0;

}

Options :

A : program outputs: 6 6

B : program outputs: 5 7

C : program outputs: 5 5 6 6 7 7

D : program outputs: 5 5 7 7

E : program outputs: 1 1 6 6 5 5

Answer: A

Question 4

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

#include <vector>

#include <set>

#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<<" "; } };

struct Sequence {

int start;

Sequence(int start):start(start){}

int operator()() { return start++; } };

int main() {

vector<int> v1(10);

generate_n(v1.begin(), 10, Sequence(1));

random_shuffle(v1.rbegin(), v1.rend());

sort(v1.begin(), v1.end(), great<int>());

for_each(v1.begin(), v1.end(), Out<int>(cout));cout<<endl;

return 0;

}

Program outputs:

Options :

A : 8 10 5 1 4 6 2 7 9 3

B : 1 2 3 4 5 6 7 8 9 10

C : compilation error

D : 10 9 8 7 6 5 4 3 2 1

Answer: C

Question 5

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

#include <vector>

#include <iostream>

#include <algorithm>

using namespace std;

class B { int val;

public:

B(int v):val(v){}

int getV() const {return val;} bool operator < (const B & v) const { return val<v.val;} };

ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;}

template<class T>struct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<<val<<" "; } };int main() {

B t1[]={3,2,4,1,5};

int t2[]={5,6,8,2,1};

vector<B> v1(10,0);

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<B>(cout));cout<<endl;

return 0;

}

Program outputs:

Options :

A : 3 2 4 1 5 6 8 2 1 0

B : 1 2 3 4 5 6 8 2 1 0

C : 1 1 2 2 3 4 5 5 6 8

D : 1 2 3 4 5 6 8 0 0 0

E : compilation error

Answer: A