C++ Institute CPP-22-02 Online Practice Questions and Exam Preparation

C++ Institute CPP-22-02 Online Questions & Answers

• Question 41:

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

  #include

  #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<

  }

  };

  struct Sequence {

  int start;

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

  int operator()() {

  return start++ ;

  }

  };

  int main() {

  vector v1(5);

  generate(v1.begin(), v1.end(), Sequence(1));

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

  deque d1(s1.rbegin(), s1.rend());

  reverse(v1.begin(),v1.end());

  reverse(s1.begin(), s1.end());

  reverse(d1.begin(), d1.end());

  for_each(v1.begin(), v1.end(), Out(cout) );

  for_each(s1.begin(), s1.end(), Out(cout) );

  for_each(d1.begin(), d1.end(), Out(cout) );cout<

  return 0;

  }

  Program outputs:

  A. 5 4 3 2 1 1 2 3 4 5 1 2 3 4 5
  B. 1 2 3 4 5 1 2 3 4 5 5 4 3 2 1
  C. no output
  D. 1 2 3 4 5 5 4 3 2 1 1 2 3 4 5
  E. compilation error
  E. compilation error

• Question 42:

  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 ,4 ,5, 6 , 7, 8 , 9, 10};

  vectorv1(t, t+10);

  dequed1(t, t+10);

  vector::iterator it1 = v1.begin();

  deque::iterator it2 = d1.begin();

  d1.erase(it2+5);

  it2 = d1.begin();

  cout<<*(it2+5)<<" ";

  v1.erase(it1+5);

  it1 = v1.begin();

  cout<<*(it1+5)<

  }

  A. program outputs: 7 7
  B. program outputs: 6 6
  C. compilation error
  D. result is unpredictable
  A. program outputs: 7 7

• Question 43:

  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){}

  operator int() { return val;}

  };

  templatestruct Out {

  ostream and out;

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

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

  struct Sequence { int start;

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

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

  bool predicate(int v) { return v%2==0; }

  int main() {

  vector v1(10);

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

  for_each(v1.begin(), remove_if(v1.begin(), v1.end(), predicate), Out(cout));cout<

  return 0;}

  Program outputs:

  A. 1 3 5 7 9 6 7 8 9 10
  B. 1 3 5 7 9
  C. 2 4 6 8 10
  D. compilation error
  E. no output
  B. 1 3 5 7 9

• Question 44:

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

  #include

  #include

  #include

  using namespace std;

  void print(int v) { cout<

  struct Sequence {

  int start;

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

  int operator()() {

  return 10*(1+(start++ %3));

  }

  };

  int main() {

  vector v1(10);

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

  remove(v1.begin(), v1.end(), 10);

  for_each(v1.begin(), v1.end(), print);cout<

  return 0;

  }

  Program outputs:

  A. 20 30 10 20 30 10 20 30 10 20
  B. 20 30 20 30 20 30 20
  C. 20 30 20 30 20 30 20 30 10 20
  D. compilation error
  C. 20 30 20 30 20 30 20 30 10 20

• Question 45:

  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 v (t,t+15);

  vector::iterator it = search_n(v.begin(), v.end(), 4, 2);

  cout<< it?v.begin()<

  return 0;

  }

  Program outputs:

  A. 10
  B. 3
  C. 1
  D. 15
  E. compilation error
  D. 15

• Question 46:

  What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: 1.1 2.2 3.3?

  #include

  #include

  using namespace std;

  int main ()

  {

  int a,b,c;

  cin>>a>>b>>c;

  cout<

  return 0;

  }

  Program will output:

  A. 123
  B. 1 2 3
  C. 1.12.23.3
  D. 1.1 2.2 3.3
  E. none of these
  E. none of these

• Question 47:

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

  #include

  #include

  #include

  using namespace std;

  template void print(T start, T end) {

  while (start != end) {

  std::cout << *start << " "; start++;

  }

  }

  class A {

  int a;

  public:

  A(int a):a(a){}

  operator int () const { return a;}int getA() const { return a;}

  };

  struct R {

  int val;

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

  bool operator ()(const A and a) { return a>val;} };

  int main() {

  int t1[] ={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

  list l1(t1, t1 + 10);

  R r(4);l1.remove_if(r);

  print(l1.begin(), l1.end()); cout<

  return 0;

  }

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

• Question 48:

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

  #include

  #include

  #include

  using namespace std;

  template void print(T start, T end) {

  while (start != end) {

  std::cout << *start << " "; start++;

  }

  }

  int main(){

  vectorv;

  set s;

  for(int i=10; i>0; i??) {

  v.push_back(i);

  s.push_back(i);

  }

  print(v.begin(), v.end()); print(s.begin(), s.end());cout<

  return 0;

  }

  A. 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10
  B. 10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1
  C. 10 9 8 7 6 5 4 3 2 1 and unpredictable sequence of number range 1 to 10
  D. compilation error
  D. compilation error

• Question 49:

  What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: 1 2 3 4 quit?

  #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 main ()

  {

  list l;

  while(cin.good())

  {

  string s;

  cin>>s;

  if (s == "quit") break;

  l.push_back(s);

  }

  for_each(l.begin(), l.end(), Out(cout));

  return 0;

  }

  Program will output:

  A. 1 2 3 4
  B. 1 2 3 4 quit
  C. 1 D. program runs forever without output
  A. 1 2 3 4

• Question 50:

  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 and v) const { return val

  ostream and operator <<(ostream and out, const B and v) { out<

  templatestruct Out {

  ostream and out;

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

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

  int main() {

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

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

  vector v1(10,0);

  sort(t1, t1+5);

  sort(t2, t2+5);

  set_symmetric_difference(t2,t2+5,t1,t1+5,v1.begin());

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

  return 0;

  }

  Program outputs:

  A. 6 8 3 4 0 0 0 0 0 0
  B. 3 4 0 0 0 0 0 0 0 0
  C. 6 8 0 0 0 0 0 0 0 0
  D. compilation error
  E. 3 4 6 8 0 0 0 0 0 0
  E. 3 4 6 8 0 0 0 0 0 0