Buy Latest Dec 29, 2022 CPP Exam Q&A PDF – One Year Free Update [Q126-Q149]

NO.126 What happens when you attempt to compile and run the following code?
# include <iostream>
# include <set>
# include <vector>
using namespace std;
int main(){
int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector<int>v(myints, myints+10);
set<int> s1(v.begin(),v.end());
s1.insert(v.begin(),v.end());
s1.erase(s1.lower_bound(2),s1.upper_bound(7));
for(set<int>::iterator i=s1.begin();i!= s1.end(); i++) {
cout<<*i<<” “;
}
return 0;
}

NO.127 What will happen 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);
set<int> s1(v.begin(),v.end());
s1.insert(v.begin(),v.end());
pair<set<int>::iterator,set<int>::iterator> range;
range = s1.equal_range(6);
cout<<*range.first<<” “<<*range.second<<endl;
return 0;
}
The output will be:

NO.128 What happens when you attempt to compile and run the following code?
# include <iostream>
# include <deque>
# include <list>
# include <stack>
# include <vector>
using namespace std;
int main()
{
deque<int> mydeck;list<int> mylist; vector<int> myvector;
stack<int> first;
stack<int> second(mydeck);
stack<int> third(second);
stack<int, list<int> > fourth(mylist);
fourth.push(10);fourth.push(11);fourth.push(12);
stack<int, vector<int> > fifth(myvector);
fifth.push(10);fifth.push(11);fifth.push(12);
while(!fifth.empty())
{
cout<<fifth.top()<<” “;
fifth.pop();
}
while (!fourth.empty())
{
cout << fourth.front() << ” “;
fourth.pop();
}
return 0;
}

NO.129 What happens when you attempt to compile and run the following code?
#include <deque>
#include <iostream>
#include <algorithm>
#include <set>
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 t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
int t1[]={1,2,3,4};
deque<int> d1(t, t+10);
set<int> s1(t, t+10);
sort(d1.begin(), d1.end());
cout<<includes(s1.begin(),s1.end(), t1,t1+4)<<” “<<includes(d1.begin(),d1.end(), t1,t1+4)
<<endl;
return 0;
}
Program outputs:

NO.130 What happens when you attempt to compile and run the following code?
# include <iostream>
# include <iomanip>
using namespace std;
int main ()
{
float f = 10.126;
cout<<f<<” “<<setprecision(2)<<f<<endl;
return 0;
}
Program outputs:

NO.131 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;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t + 10);
copy_backward(t, t+10, v1.rend());
for_each(v1.begin(), v1.end(), myfunction);
return 0;
}
Program outputs:

NO.132 What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int main()
{
cout.setf(ios::oct, ios::basefield);
cout<<100<<” “;
cout.setf(ios::showbase);
cout<<100<<” “;
return 0;
}
Program outputs:

NO.133 What happens when you attempt to compile and run the following code?
#include <iostream>
#include <map>
#include <vector>
#include <string>
using namespace std;
int main(){
int second[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
string first[] = {“three”, “four”, “two”, “one”, “six”,”five”, “seven”, “nine”,”eight”,”zero”}; map<int,string> m; for(int i=0; i<10; i++) { m.insert(pair<int,string>(second[i],first[i]));
}
m[0]=”ten”;
m.insert(pair<int,string>(1,”eleven”));
for(map<int, string>::iterator i=m.begin();i!= m.end(); i++) {
cout<<i?>second<<” “;
}
return 0;
}

NO.134 What happens when you attempt to compile and run the following code?
#include <vector>
#include <iostream>
int main ()
{
int t[]={1,2,3,4,5};
std::vector<int>v1(t,t+5);
std::vector<int>v2(v1);
v1.resize(10);
v2.reserve(10);
std::vector<int>::iterator i = v1.begin();int ii = 0;
while (i != v1.end()) { std::cout<<i[ii]<<” “;ii??;i++; }
i = v2.begin();ii=0;
while (i != v2.end()) { std::cout<<i[ii]<<” “;ii??;i++; }
return 0;
}

NO.135 Which are NOT valid instantiations of priority_queue object:
# include <iostream>
# include <deque>
# include <list>
# include <queue>
# include <vector>
using namespace std;
int main()
{
deque<int> mydeck;list<int> mylist; vector<int> myvector;
priority_queue<int> first;//line I
priority_queue<int, deque<int> > second;//line II
priority_queue<int> third(first);//line III
priority_queue<int, list<int> > fourth(third);//line IV
priority_queue<int, vector<int> > fifth(myvector.begin(), myvector.end());//line V return 0;
}

NO.136 What happens when you attempt to compile and run the following code?
# include <iostream>
# include <map>
# include <vector>
# include <string>
using namespace std;
int main(){
int second[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
string first[] = {“three”, “four”, “two”, “one”, “six”,”five”, “seven”, “nine”,”eight”,”zero”}; map<int,string> m;
for(int i=0; i<10; i++) {
m.insert(pair<int,string>(second[i],first[i]));
}
m[0]=”ten”;
m.insert(pair<int,string>(1,”eleven”));
for(map<int, string>::iterator i=m.begin();i!= m.end(); i++) {
cout<<i?>second<<” “;
}
return 0;
}

NO.137 What happens when you attempt to compile and run the following code?
# include <deque>
# include <set>
# 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() {
int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
deque<B> d1(t, t+10);
sort(d1.begin(), d1.end());
set<B> s1(t,t+10);
cout<<binary_search(s1.begin(),s1.end(), B(4))<<” “<<binary_search(d1.begin(),d1.end(),
B(4))<<endl;
return 0;
}
Program outputs:

NO.138 What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <map>
using namespace std;
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
map<int, int> m;
for(int i=0; i < 10; i++) {
m[i]=t[i];
}
pair<const int,int> p(5,5);
map<int, int>::iterator it = find(m.begin(), m.end(), p);
if (it != m.end())
{
cout<<it?>first<<endl;
}
else
{
cout<<“Not found!n”;
}
return 0;
}
Program outputs:

NO.139 What will happen when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
template <typedef T>
class A {
T_v;
public:
A(T v): _v(v){}
T getV() { return _v; }
};
int main()
{
A<int> a(1);
cout << a.getV() <<endl;
return 0;
}

NO.140 What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: true false<enter>?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
bool a,b;
cin>>boolalpha>>a>>b;
cout<<a<<b<<endl;
return 0;
}
Program will output:

NO.141 What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int main()
{
cout.setf(ios::hex, ios::basefield);
cout<<100<<” “;
cout.flags(ios::showbase);
cout<<100<<” “;
return 0;
}
Program outputs:

NO.142 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() {
int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
vector<B> v1(t, t+10);
sort(v1.begin(), v1.end());
for_each(v1.begin(), v1.end(), Out<B>(cout));cout<<endl;
return 0;
}
Program outputs:

NO.143 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;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t + 10);
copy(t, t+10, v1.end());
for_each(v1.begin(), v1.end(), myfunction);
return 0;
}
Program outputs:

NO.144 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<<” “; } };
struct Add : public binary_function<int, int, int> {
int operator() (const int & a, const int & b) const {
return a+b;
}
};
int main() {
int t[]={1,2,3,4,5,6,7,8,9,10};
vector<int> v1(t, t+10);
vector<int> v2(10);
transform(v1.begin(), v1.end(), v2.begin(), bind1st(Add(), 1));
for_each(v2.rbegin(), v2.rend(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:

NO.145 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<<” “;
}
};
struct Sequence {
int start;
Sequence(int start):start(start){}
int operator()() { return 10*(1+(start++ %3)); } };
int main() {
vector<int> v1(10);
vector<int> v2(10);
generate(v1.begin(), v1.end(), Sequence(1));
sort(v1.rbegin(), v1.rend());
unique_copy(v1.begin(),v1.end(), v2.begin());
for_each(v2.begin(), v2.end(), Out<int>(cout) );cout<<endl;
return 0;
}
Program outputs:

NO.146 What happens when you attempt to compile and run the following code?
#include <iostream>
#include <set>
#include <vector>
using namespace std;
int main(){
int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector<int>v(myints, myints+10);
set<int> s1(v.begin(),v.end());
set<int, greater<int> > s2(v.begin(), v.end());
for(set<int>::iterator i=s1.begin();i!= s1.end(); i++) {
cout<<*i<<” “;
}
for(set<int, greater<int> >::iterator i=s2.begin();i!= s2.end(); i++) { cout<<*i<<” “;
}
cout<<endl;
return 0;
}

NO.147 What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
# include <deque>
# include <set>
using namespace std;
void myfunction(int i) {
cout << ” ” << i;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<int> v1(t, t + 10);
deque<int> d1(t, t + 10);
set<int> s1(t, t + 10);
for_each(v1.begin(), v1.end(), myfunction); // Line I
for_each(d1.begin(), d1.end(), myfunction); // Line II
for_each(s1.begin(), s1.end(), myfunction); // Line III
return 0;
}

NO.148 What happens when you attempt to compile and run the following code?
# include <deque>
# 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 t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
deque<int> d1(t, t+10);
sort(d1.begin(), d1.end());
deque<int>::iterator it = upper_bound(d1.begin(), d1.end(), 4);
for_each(it, d1.end(), Out<int>(cout));cout<<endl;
return 0;
}
Program outputs:

NO.149 What happens when you attempt to compile and run the following code?
#include <deque>
#include <iostream>
#include <algorithm>
#include <set>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<” “; }
};
bool Compare(char a, char b) { return tolower(a) < tolower(b);}
int main() {
char s[]={“qwerty”};
char t1[]={“ert”};
char t2[]={“ERT”};
sort(s, s+6);
cout<<includes(s,s+6, t1,t1+3, Compare)<<” “<<includes(s,s+6, t2,t2+3, Compare)<<endl; return 0;
}
Program outputs: