C++ Certified Professional Programmer
Last Update Sep 13, 2025
Total Questions : 228
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What happens when you attempt to compile and run the following code?
#include
#include
#include
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 ostream & operator <<(ostream & out, const B & v) { out< template ostream & out; Out(ostream & o): out(o){} void operator() (const T & val ) { out< int main() { B t1[]={3,2,4,1,5}; B t2[]={6,10,8,7,9}; vector v1(10,0); sort(t1, t1+5); sort(t2, t2+5); copy(t1,t1+5,v1.begin()); copy(t2,t2+5,v1.begin()+5); inplace_merge(v1.begin(), v1.begin()+5,v1.end()); for_each(v1.begin(), v1.end(), Out(cout));cout< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
class A {
int a;
public:
A(int a) : a(a) {}
int getA() const { return a; } void setA(int a) { this?>a = a; }
};
struct Even {
bool operator ()(const A & a, const A &b) {
return (a.getA() % 2)==b.getA() % 2;
}
};
int main () {
int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};
deque
deque
cout<< it?d.begin()< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int main() { string t[]={"aaa","Aaa", "aAa","aaA","bbb","Bbb", "bBb", "bbB"}; vector sort(v1.begin(), v1.end()); for_each(v1.begin(), v1.end(), Out return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
multiset
s1.insert(s1.find(7), 3);
for(multiset
cout<<*i<<" ";
}
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
bool compare(int a, int b) { return a == b; }
int main () {
int t[] = {1,2,3,4,5,1,2,3,4,5};
vector
vector
int m1[] = {1, 2, 3};
while ( (it = find_first_of (it, v.end(), m1, m1+3)) != v.end()) {
cout< } cout<< endl; return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main(){
int myints[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector
set
set
for(set
cout<<*i<<" ";
}
for(set
cout<<*i<<" ";
}
cout< return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
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 }; ostream & operator <<(ostream & out, const B & v) { out< template ostream & out; Out(ostream & o): out(o){} void operator() (const T & val ) { out< }; int main() { B t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3}; B t1[]={B(1),B(2),B(3),B(4)}; deque d1(t, t+10); set s1(t, t+10); sort(d1.begin(), d1.end()); cout< < return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
using namespace std;
class A
{
int a,b;
public:
A(const A & c) { a = c.a; }
A():a(0),b(0){}
void setA(int a) {this?>a = a;} void setB(int b) {this?>b = b;}
int getA() {return a;} int getB() {return b;}
};
int main ()
{
vectorv;
A a;
a.setA(10); a.setB(11);
v.push_back(a);
cout< return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int main() { int t[]={3,2,4,1,5,6,10,8,7,9}; vector for_each(v1.begin(), v1.end(), bind1st(plus for_each(v1.rbegin(), v1.rend(), Out return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
using namespace std;
int main() {
int t[] = { 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 };
string s[] = { "one", "one", "two", "two", "three","three", "four", "four", "five", "five"};
multimap
for (int i = 0; i < 10; i++) {
m.push_back(pair
}
for (multimap
cout << i?>first << " ";
}
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int main() { int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3}; deque sort(d1.begin(), d1.end()); deque for_each(it, d1.end(), Out return 0; } Program outputs:
What will happen when you attempt to compile and run the following code? Choose all possible answers.
#include
using namespace std;
class B {};
template
class A {
T_v;
public:
A() {}
A(T v): _v(v){}
T getV() { return _v; }
void add(T a) { _v+=a; }
};
int main()
{
A
Ab;
a.add(10);
cout << a.getV() < return 0; }
What happens when you attempt to compile and run the following code? Choose all that apply.
#include
#include
#include
using namespace std;
class A
{
int a;
public:
A(int a) {this?>a = a; c++;}
A(const A & a) {this?>a = a.a; c++;}
~A() { c??;}
static int c;
};
int A::c(0);
int main ()
{
A* t[] = {new A(1), new A(2), new A(3),new A(4), new A(5)};
vector
deque
d1.clear();
v1.clear();
cout< return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
using namespace std;
template
void print(T start, T end) {
while (start != end) {
std::cout << *start << " "; start++;
}
}
int main()
{
int t1[] ={ 1, 2, 3, 4, 5};
list
l1.remove(2);
print(l1.begin(), l1.end()); cout< return 0; }
What happens when you attempt to compile and run the following code?
#include
using namespace std;
template
class A {
T_v;
public:
A() {}
A(T v): _v(v){}
friend ostream & operator<<(ostream & c, const A
};
template
ostream & operator<<(ostream & c, const A
c< int main() { A cout< return 0; }
What happens when you attempt to compile and run the following code? Choose all that apply.
#include
#include
#include
#include
#include
#include
using namespace std;
class B { int val;
public:
B(int v=0):val(v){}
int getV() const {return val;}
operator int() const { return val; };};
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) {out< int main () { int t[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; fstream f("test.out", ios::trunc|ios::out); list l(t, t+10); for_each(l.begin(), l.end(), Out(f)); f.close(); f.open("test.out"); for( ; f.good() ; ) { int i; f>>i; cout< } f.close(); return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main () {
int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};
vector
int number = count(v.begin(), v.end(), 2);
cout<< number< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
void myfunction(int i) {
cout << " " << i;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
deque
vector
sort(d1.begin(), d1.end());
swap_ranges(v1.begin(), v1.end(), d1.begin());
for_each(v1.begin(), v1.end(), myfunction);
for_each(d1.begin(), d1.end(), myfunction);
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main () {
int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};
vector
vector
cout<< it?v.begin()< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
using namespace std;
int main()
{
cout.setf(ios::hex, ios::basefield);
cout<<100<<" ";
cout.flags(ios::showbase);
cout<<100<<" ";
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int main() { int t1[]={3,2,4,1,5}; int t2[]={5,6,8,2,1}; vector sort(t1, t1+5); sort(t2, t2+5); set_intersection(t1,t1+5,t2,t2+5,v1.begin()); for_each(v1.begin(), v1.end(), Out return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
class B { int val;
public:
B(int v):val(v){} B(){}
int getV() const {return val;} };
ostream & operator <<(ostream & out, const B & v) { out< template ostream & out; Out(ostream & o): out(o){} void operator() (const T & val ) { out< int main() { int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3}; deque d1(t, t+10); deque::iterator it = lower_bound(d1.begin(), d1.end(), 4); for_each(it, d1.end(), Out(cout));cout< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
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
for(int i=0; i<10; i++) {
m.insert(pair
}
m[0]="ten";
m.insert(pair
for(map
cout<
}
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
class B { int val;
public:
B(int v=0):val(v){}
int getV() const {return val;}
operator int () const { return val;} };
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< struct Add { B operator()(B & a, B & b) { return a+b; }}; int main() { int t[]={1,2,3,4,5,6,7,8,9,10}; vector v1(t, t+10); vector v2(10); transform(v1.begin(), v1.end(), v2.begin(), bind1st(1,Add())); for_each(v2.rbegin(), v2.rend(), Out(cout));cout< return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int Add(int a, int b) { return a+b; } int main() { int t[]={1,2,3,4,5,6,7,8,9,10}; vector vector transform(v1.begin(), v1.end(), v2.begin(), bind2nd(ptr_fun (Add),1)); for_each(v2.rbegin(), v2.rend(), Out return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
int main() {
int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};
vector
set
pair
cout<<*resultSet.first<<" "<<*resultSet.second< return 0; } Program outputs:
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
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) {out< int main () { ifstream f("test.in"); list for( ; f.good() ; ) { int i; f>>i; l.push_back(i); } f.close(); for_each(l.begin(), l.end(), Out return 0; } Program will output:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
bool identical(int a, int b) {
return b == 2*a?true:false;
}
int main() {
int t[] = {1,2,3,2,3,5,1,2,7,3,2,1,10, 4,4,5};
int u[] = {2,4,6,4,6,10,2,4,14,6,4,2,20,8,8,5};
vector
deque
pair
result = mismatch(d1.begin(), d1.end(), v1.begin(), identical); //Line I
if (result.first == d1.end() && result.second == v1.end()) {//Line II
cout<<"Identical\n";
} else {
cout<<"Not identical\n";
}
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
#include
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 0, 1, 2, 3, 4, 0 };
vector
multimap
for(vector
stringstream s; s<<*i<<*i; m.insert(pair
}
for(multimap
cout<<*i<<" ";
}
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
#include
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector
map
for(vector
stringstream s; s<<*i<<*i; m.insert(pair
}
for(map
cout<<*i<<" ";
}
return 0;
}
What will happen when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector
set
s1.insert(v.begin(),v.end());
bool found = s1.find(7);
if (found){
cout<<"Element found!\n";
}else {
cout<<"Element not found!\n";
}
return 0;
}
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< template T start; T step; Sequence(T start, T step):start(start), step(step){} T operator()() { T v = start; start+=step; return v; } }; bool Less(float a, float b) { return int(a) int main() { float t[]={2.28, 1.66, 1.32, 3.94, 3.64, 2.3, 2.98, 1.96, 2.62, 1.13}; vector stable_sort(v1.begin(), v1.end(), Less); for_each(v1.begin(), v1.end(), Out return 0; } Program outputs:
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
#include
using namespace std;
int main()
{
deque
stack
stack
stack
stack
fourth.push(10);fourth.push(11);fourth.push(12);
stack
fifth.push(10);fifth.push(11);fifth.push(12);
while(!fifth.empty())
{
cout< fifth.pop(); } while (!fourth.empty()) { cout << fourth.front() << " "; fourth.pop(); } return 0; }
What happens when you attempt to compile and run the following code?
#include
#include
#include
#include
using namespace std;
template
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out< int main() { int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3}; int t1[]={1,2,3,4}; deque set sort(d1.begin(), d1.end()); cout< < return 0; } Program outputs:
TESTED 13 Sep 2025
