C++ Institute C++ Institute Certifications CPP Questions & Answers

• Question 211:

  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 d1(t, t+10);

  vector v1(d1.rbegin(), d1.rend());

  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:

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

  B. compilation error

  C. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10

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

  E. 1 3 8 7 4 2 6 9 5 10 1 2 3 4 5 6 7 8 9 10

  Correct Answer: D

• Question 212:

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

  #include

  #include

  #include

  #include

  using namespace std;

  templatestruct Out {

  ostream and out;

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

  void operator() (const T and 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 v1(t, t+10);

  vector v2(10);

  transform(v1.begin(), v1.end(), v2.begin(), bind2nd(ptr_fun (Add),1));

  vector::iterator it = find_if(v2.begin(), v2.end(),bind2nd(equal_to(),10));

  cout<<*it<

  return 0;

  }

  Program outputs:

  A. false

  B. true

  C. 10

  D. 0

  E. compilation error

  Correct Answer: C

• Question 213:

  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 };

  set s1(t, t+10);

  vector v1(s1.rbegin(), s1.rend());

  swap_ranges(s1.begin(), s1.end(), v1.begin());

  for_each(v1.begin(), v1.end(), myfunction);

  for_each(s1.begin(), s1.end(), myfunction);

  return 0;

  }

  Program outputs:

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

  B. compilation error

  C. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10

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

  E. 10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1

  Correct Answer: B

• Question 214:

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

  #include

  #include

  #include

  using namespace std;

  int main(){

  int t[] ={ 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 };

  listv(t, t+10);

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

  if (s1.count(3) == 2) {

  s1.erase(3);

  }

  for(set::iterator i=s1.begin();i!= s1.end(); i++) {

  cout<<*i<<" ";

  }

  return 0;

  }

  A. program outputs: 1 2 3 4 5

  B. program outputs: 1 2 4 5

  C. program outputs: 1 1 2 2 3 4 4 5 5

  D. program outputs: 1 1 2 3 3 4 4 5 5

  E. compilation error

  Correct Answer: A

• Question 215:

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

  #include

  #include

  #include

  using namespace std;

  int main() {

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

  map m;

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

  m[i]=t[i];

  }

  pair p(5,5);

  map::iterator it = find(m.begin(), m.end(), p);

  if (it != m.end())

  {

  cout<first<

  }

  else

  {

  cout<<"Not found!\n";

  }

  return 0;

  }

  Program outputs:

  A. 5

  B. Not found!

  C. 10

  D. compilation error

  Correct Answer: B

• Question 216:

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

  #include

  #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 };

  vector v1(t, t + 10);

  deque d1(t, t + 10);

  set 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;

  }

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

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

  C. program outputs: 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10

  D. compilation error in line I

  E. compilation error in line III

  Correct Answer: A

• Question 217:

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

  #include

  #include

  #include

  using namespace std;

  templatestruct Out {

  ostream and out;

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

  void operator() (const T and val ) { out<

  int main() {

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

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

  vector v1(10);

  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(cout));cout<

  return 0;

  }

  Program outputs:

  A. compilation error

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

  C. 1 2 3 4 5 6 8 2 1 0

  D. 1 1 2 2 3 4 5 5 6 8

  E. 1 2 5 0 0 0 0 0 0 0

  Correct Answer: E

• Question 218:

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

  #include

  #include

  #include

  using namespace std;

  templatestruct Out {

  ostream and out;

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

  void operator() (const T and val ) { out<

  int main() {

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

  vector v1(t,t+10);

  cout<<*max_element(v1.begin(), v1.end());

  return 0;

  }

  Program outputs:

  A. 3

  B. 1

  C. 6

  D. 10

  E. compilation error

  Correct Answer: D

• Question 219:

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

  #include

  #include

  #include

  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 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. 1 5 9 6 2 4 7 8 3 1

  B. compilation error

  C. 1 2 3 4 5 6 7 8 9 10

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

  E. 10 5 9 6 2 4 7 8 3 1

  Correct Answer: A

• Question 220:

  Which sentence is correct about the code below?

  #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; }

  /* Insert Code Here */

  };

  struct add10 { void operator()(A and a) { a.setA(a.getA() + 10); } };

  int main() {

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

  vector v1(t, t + 10);

  for_each(v1.begin(), v1.end(), add10());

  vector::iterator it = find(v1.begin(), v1.end(), A(7));

  cout << it?>getA() << endl;

  return 0;

  }

  A. it will compile and print 7

  B. it will not compile

  C. it will compile but the program result is unpredictable

  D. adding code: bool operator !=(const A and b) const { if (this?>a != b.a) { return true; } return false; } at Place 1 will allow the program to compile

  Correct Answer: B