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

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

• Question 101:

  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;

  }

  struct sequence {

  int val,inc;

  sequence(int s, int i):val(s),inc(i){}

  int operator()(){

  int r = val; val += inc;

  return r;

  }

  };

  int main() {

  vector v1(10);

  fill(v1.begin(), v1.end(), sequence(1,1));

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

  return 0;

  }

  Program outputs:

  A. 1 2 3 4 5 6 7 8 9 10
  B. 10
  C. 0 0 0 0 0 0 0 0 0 0
  D. compilation error
  D. compilation error

• Question 102:

  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 };

  vectorv(t, t+10);

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

  multiset > s2(v.begin(), v.end());

  for(multiset >::iterator i=s2.begin();i!= s2.end(); i++) {

  cout<<*i<<" ";

  }

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

  cout<<*i<<" ";

  }

  cout<

  return 0;

  }

  The output will be:

  A. 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
  B. 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
  C. 0 1 2 3 4 5 6 7 8 9 9 8 7 6 5 4 3 2 1 0
  D. 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9
  D. 9 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9

• Question 103:

  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<

  struct Add {

  int operator()(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(), bind1st(ptr_fun (Add()), 1));

  for_each(v2.rbegin(), v2.rend(), Out(cout));cout<

  return 0;

  }

  Program outputs:

  A. 1 2 3 4 5 6 7 8 9 10
  B. 2 3 4 5 6 7 8 9 10 11
  C. 10 9 8 7 6 5 4 3 2 1
  D. 11 10 9 8 7 6 5 4 3 2
  E. compilation error
  E. compilation error

• Question 104:

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

  #include

  using namespace std;

  int main()

  {

  cout<<100<<" ";

  cout.setf(ios::hex);

  cout<<100<<" ";

  return 0;

  } Program outputs:

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

• Question 105:

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

  #include

  using namespace std;

  void g(int a)

  {

  cout<

  }

  template

  void g(A a)

  {

  cout<

  }

  int main()

  {

  int a = 1;

  g(a);

  return 0;

  }

  A. program displays: 0
  B. program displays: 2
  C. compilation error
  D. runtime exception
  A. program displays: 0

• Question 106:

  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
  D. 10

• Question 107:

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

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

  return 0;

  }

  Program outputs:

  A. 3 2 4 1 5 6 8 2 1 0
  B. 1 2 3 4 5 6 8 2 1 0
  C. 1 1 2 2 3 4 5 5 6 8
  D. 1 2 3 4 5 6 8 0 0 0
  E. compilation error
  D. 1 2 3 4 5 6 8 0 0 0

• Question 108:

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

  #include

  using namespace std;

  class C {

  public:

  int _c;

  C():_c(0){}

  C(int c) { _c = c;}

  C operator+=(C and b) {

  C tmp;

  tmp._c = _c+b._c;

  return tmp;

  }

  };

  template

  class A {

  T_v;

  public:

  A() {}

  A(T v): _v(v){}

  T getV() { return _v; }

  void add(T and a) { _v+=a; }

  };

  int main()

  {

  A b(2);

  Aa (5);

  Cc;

  a.add(c);

  cout << a.getV() <

  return 0;

  }

  A. program will display:2
  B. program will not compile
  C. program will compile
  D. program will cause runtime exception
  B. program will not compile

• Question 109:

  What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: one two three?

  #include

  #include

  using namespace std;

  int main ()

  {

  string a;

  cin.getline(a);

  cout<

  return 0;

  }

  Program will output:

  A. one
  B. one two three
  C. runtime exception
  D. compilation error
  E. the result is unspecified
  D. compilation error

• Question 110:

  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<

  }

  };

  struct Sequence {

  int start;

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

  int operator()() { return 10*(1+(start++ %3)); } };

  int main() {

  vector v1(10);

  vector 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(cout) );cout<

  return 0;

  }

  Program outputs:

  A. 20 30 10 20 30 10 20 30 10 20
  B. 30 20 10 0 0 0 0 0 0 0
  C. 30 0 0 0 0 0 0 0 20 10
  D. compilation error
  B. 30 20 10 0 0 0 0 0 0 0