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

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

• Question 181:

  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){}

  T getV() { return _v; }

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

  template

  U get(U a) {

  return (U)(_v);

  }

  };

  int main()

  {

  A a(1);

  a.add(10);

  cout.setf( ios::showpoint);

  cout << a.getV() << " " << a.get(1.0)<

  return 0;

  }

  A. program will display: 11 11
  B. program will not compile
  C. program will display: 11.0000 11
  D. program will display: 11 11.000
  D. program will display: 11 11.000

• Question 182:

  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 v(t, t + 10);

  map m;

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

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

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

  }

  pair::iterator, map::iterator> range;

  range = m.equal_range(6);

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

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

  }

  return 0;

  }

  A. program outputs: 6
  B. program outputs: 5 7
  C. program outputs: 6 7
  D. program outputs: 1 5
  E. program outputs: 6 5
  A. program outputs: 6

• Question 183:

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

  #include

  using namespace std;

  int main ()

  {

  float f1 = 10.0;

  float f2 = 10.123;

  cout<

  return 0;

  }

  Program outputs:

  A. 10 10
  B. 10.0 10.123
  C. compilation error
  D. 10 10.123
  D. 10 10.123

• Question 184:

  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 start++ ; }};

  int main() {

  vector v1(10);

  generate(v1.rbegin(), v1.rend(), Sequence(1));

  rotate(v1.begin(),v1.begin() + 1, v1.end() );

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

  return 0;

  }

  Program outputs:

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

• Question 185:

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

  #include

  #include

  using namespace std;

  int main ()

  {

  float f = 10.126;

  cout.unsetf(ios::floatfield);

  cout<

  return 0;

  }

  What will be a mantissa part of the numbers displayed:

  A. 1.0126 1.013
  B. 1.012600 10.013
  C. 10.01260 10.013
  D. 1.012600 1.013
  E. 1.0126 1.01
  D. 1.012600 1.013

• Question 186:

  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 start++; } };

  int main() {

  vector v1(10);

  vector v2(10);

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

  reverse_copy(v1.begin(),v1.end(), v2.rbegin());

  sort(v2.begin(), v2.end(), less_equal());

  for_each(v2.begin(), v2.end(), Out(cout) );cout<

  return 0;

  }

  Program outputs:

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

• Question 187:

  Which method added to class B at the marked spot will allow the code below to compile? Choose all possible solutions.

  #include

  #include

  #include

  using namespace std;

  class B { int val;

  public:

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

  int getV() const {return val;}

  /* Insert Code Here */

  };

  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() {

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

  vector v1(t, t+10);

  sort(v1.begin(), v1.end(), greater());

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

  return 0;

  }

  A. bool operator < (const B and v) const { return val
  B. bool operator > (const B and v) const { return val
  C. bool operator > (const B and v) const { return val>v.val;}
  D. bool operator == (const B and v) const { return val==v.val;}
  E. operator int () const { return val; }
  B. bool operator > (const B and v) const { return val
  C. bool operator > (const B and v) const { return val>v.val;}
  D. bool operator == (const B and v) const { return val==v.val;}

• Question 188:

  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 add (int a, int b) { return a+b; }

  int main() {

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

  vector v1(t, t+10);

  set s1(t, t+10);

  deque d1;

  d1.resize(s1.size());

  transform(s1.begin(), s1.end(), v1.begin(), d1.begin(), add);

  for_each(d1.begin(), d1.end(), myfunction);

  return 0;

  }

  Program outputs:

  A. 0 0 0 0 0 0 0 0 0 0
  B. 11 7 12 10 7 10 14 16 12 11
  C. compilation error
  D. runtime exception
  E. 20 10 18 12 4 8 14 16 6 2
  B. 11 7 12 10 7 10 14 16 12 11

• Question 189:

  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;

  templatestruct Out {

  ostream and out;

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

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

  int main () {

  ifstream f("test.in");

  list l;

  for( ; f.good() ; ) {

  int i;

  f>>i;

  l.push_back(i);

  }

  f.close();

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

  return 0;

  }

  Program will output:

  A. 1 2 3
  B. 1 2 3 3
  C. no output
  D. compilation error
  E. program runs forever without output
  A. 1 2 3

• Question 190:

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

  #include

  using namespace std;

  template

  void f(A a)

  {

  cout<<1<

  }

  void f(int a)

  {

  cout<<2<

  }

  int main()

  {

  int a = 1;

  f(a);

  return 0;

  }

  A. program displays: 1
  B. program displays: 2
  C. compilation error
  D. runtime exception
  A. program displays: 1