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

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

• Question 161:

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

  #include

  #include

  #include

  using namespace std;

  struct Even {

  bool operator ()(int a) {

  return (a % 2)==0?true:false;

  }

  };

  int main () {

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

  set s(t,t+15);

  int number = count_if(s.begin(), s.end(), Even());

  cout<< number<

  return 0;

  }

  Program outputs:

  A. 4
  B. 3
  C. 7
  D. 8
  E. compilation error
  B. 3

• Question 162:

  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; }

  bool operator==(A and b) { return a == b.a; }

  };

  struct Compare{

  bool operator()(const A and a, const A and b) {return a.getA()==b.getA();};

  };

  int main () {

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

  vector v (t,t+10);

  vector::iterator it;

  A m1[] = {A(1), A(2), A(3)};

  it = find_end (v.begin(), v.end(), m1, m1+3, Compare());

  cout << "Found at position: " << it?v.begin() << endl;

  return 0;

  }

  A. program outputs: Found at position: 5
  B. program outputs: Found at position: 0
  C. program outputs: Found at position: 7
  D. compilation error
  E. program outputs: Found at position: 10 ***/
  A. program outputs: Found at position: 5

• Question 163:

  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;} };

  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[]={6,10,8,7,9};

  vector v1(5);

  transform(t1,t1+5,t2,v1.rbegin(), plus());

  for_each(v1.rbegin(), v1.rend(), Out(cout));cout<

  return 0;

  }

  Program outputs:

  A. 9 12 12 8 14
  B. 14 8 12 12 9
  C. 3 2 4 1 5 6 10 8 7 9
  D. 1 2 3 4 5 6 7 8 9 10
  E. compilation error
  E. compilation error

• Question 164:

  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 m;

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

  m.insert(pair(second[i],first[i]));

  }

  m[0]="ten";

  m.insert(pair(1,"eleven"));

  for(map::iterator i=m.begin();i!= m.end(); i++) {

  cout<second<<" ";

  }

  return 0;

  }

  A. program outputs: zero one two three four five six seven eight nine
  B. program outputs: ten one two three four five six seven eight nine
  C. program outputs: zero eleven two three four five six seven eight nine
  D. program outputs: ten eleven two three four five six seven eight nine
  E. program outputs: 0 1 2 3 4 5 6 7 8 9
  B. program outputs: ten one two three four five six seven eight nine

• Question 165:

  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
  E. compilation error
  C. 10

• Question 166:

  What will happen when you attempt to compile and run the following code? Choose all that apply.

  #include

  #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; }

  bool operator < (const A and b) const { return a

  };

  class F {

  A val;

  public:

  F(A and v):val(v){}

  bool operator() (A and v) {

  if (v.getA() == val.getA()) return true;

  return false;

  }

  };

  int main() {

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

  vector v1(t, t + 10);

  set s1(t, t + 10);

  A a(6); F f(a);

  find_if(s1.begin(), s1.end(), f);

  if (find_if(v1.begin(), v1.end(), f) !=v1.end()) {

  cout<<"Found!\n";

  } else {

  cout<<"Not found!\n";

  }

  return 0;

  }

  A. it will compile successfully
  B. it will display Found!
  C. it will display Not found!
  D. it will not compile successfully
  D. it will not compile successfully

• Question 167:

  What will happen 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, 3, 4, 1, 2, 0 };

  vector v(t, t + 10);

  multimap m;

  for (vector::iterator i = v.begin(); i != v.end(); i++) {

  stringstream s;s << *i << *i;

  m.insert(pair(*i, s.str()));

  }

  pair::iterator, multimap::iterator> range;

  range = m.equal_range(2);

  for (multimap::iterator i = range.first; i != range.second; i++) {

  cout << i?>first << " ";

  }

  return 0;

  }

  A. 2 2
  B. 1 2
  C. 1 3
  D. 2
  E. 0 2
  A. 2 2

• Question 168:

  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<<100.33<<" ";

  cout.setf(ios::showbase);

  cout<<100.33<<" ";

  return 0;

  }

  Program outputs:

  A. 64.21 64.21
  B. 64.21 0x64.21
  C. 0x64.21 0x64.21
  D. 100.33 100.33
  E. compilation error
  D. 100.33 100.33

• Question 169:

  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.unsetf(ios::hex);

  cout<<100<<" ";

  return 0;

  }

  Program outputs:

  A. 64 64
  B. 100 0x64
  C. 0x64 0x64
  D. 64 100
  E. compilation error
  D. 64 100

• Question 170:

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

  #include

  #include

  #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;}

  bool operator < ( const A and b) const { return a

  };

  struct display { void operator() (const A and a) {cout << " " << a.getA();} };

  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);

  set s1(t, t + 10);

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

  for_each(s1.begin(), s1.end(), add10()); for_each(s1.begin(), s1.end(), display());

  return 0;

  }

  A. program outputs: 10 5 9 6 2 4 7 8 3 1 1 2 3 4 5 6 7 8 9 10
  B. program outputs: 20 15 19 16 12 14 17 18 13 11 1 2 3 4 5 6 7 8 9 10
  C. program outputs: 20 15 19 16 12 14 17 18 13 11 11 12 13 14 15 16 17 18 19 20
  D. compilation error
  D. compilation error