Advanced Input and Output Operations M8 Test

Last Updated on May 20, 2022 by Admin 3

Advanced Input and Output Operations M8 Test

  1. What happens if you try to compile and run this program?

    #include <iomanip>
#include <iostream>

using namespace std;

int
main()
{
  double goodpi = 3.1415;
  double badpi = 3.2;
  cout << goodpi <<", ";
  cout << scientific; //LINE I
  cout << setprecision(3); //LINE II
  cout << goodpi <<", ";
  cout.unsetf(ios::floatfield);
  cout<<badpi <<", ";

  return 0;
}
    • the program outputs 3.1415, 3.142e+00, 3.2,
    • the program outputs 3.1415, 3.200000, 3.14, 3.200, 
    • the program outputs 3.1415, 3.1415, 3.2, 
    • compilation error in LINE II
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs 3.1415, 3.142e+00, 3.20, 

  2.  What will happen when you attempt to compile and run the following code, assuming you enter following sequence: 9 8 7 <enter> ?

    #include <stdio.h>
#define X 1
#define Y 2

int main(void){
  int i =

#if X >> y > 0
  -X
  -X
#else
  -Y
#endif
  ;

  printf("%d", i);

  return 0;
}
    • the program outputs 7, 8, 9, 
    • the program outputs 8, 7, 9, 
    • the program outputs 8, 9, 7, 
    • the program outputs 7, 9, 8, 

  3. What happens if you try to compile and run this program?

    #include <iostream>
using namespace std;

int
main()
{
  cout << 127.45 <<", ";
  cout.setf(ios::hex, ios::basefield);
  cout.setf(ios::showbase); //LINE I
  cout << 127.45<<", ";
  cout.unsetf(ios::showbase); //LINE II
  cout <<127.45 <<", ";
  return 0;
}
    • the program outputs 127.45, 127.45, 127.45, 
    • the program outputs 127.45, 0x7f.2d, 7f.2d, 
    • the program outputs 127.45, 0x7f.2d, 0x7f.2d, 
    • compilation error in LINE I
    • the program outputs 127.45, 0x7f, 7f, 
    • compilation error in LINE II
    • runtime error at LINE II

  4. What happens if you try to compile and run this program?

    #include <iomanip>
#include <iostream>
using namespace std;

int
main()
{
  double goodpi = 3.1415;
  double badpi = 3.2;
  cout << goodpi <<", ";
  cout << badpi <<", ";
  cout <<setprecision(3); //LINE I
  cout << goodpi <<", "; //LINE II
  cout << badpi <<", ";
  return 0;
}
    • runtime error in LINE II
    • the program outputs 3.1415, 3.2, 3.1, 3.2, 
    • the program outputs 3.1415, 3.2, 3.14, 3.2, 
    • the program outputs 3.1415, 3.2, 3.1415, 3.20, 
    • compilation error in LINE I
    • compilation error in LINE II
    • the program outputs 3.1415, 3.2, 3.14, 3.20, 

  5. What happens if you try to compile and run this program?

    #include <iostream>
using namespace std;

int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::hex); //LINE I
  cout << 127 <<", ";
  cout.setf(ios::showbase, ios::basefield); //LINE II
  cout << 127 <<", ";
  return 0;
}
    • runtime error in LINE II
    • the program outputs 127, 0x7f, 0x7f
    • the program outputs 127, 127, 127, (but it is unpredictable result)
    • the program outputs 127, 7f, 0x7f
    • compilation error in LINE I
    • the program outputs 127, 7f, 7f
    • compilation error in LINE II

  6. What happens if you try to compile and run this program?

    #include <iostream>
using namespace std;

int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::hex, ios::basefield); //LINE I
  cout << 127 <<", ";
  cout.setf(ios::showbase); //LINE II
  cout << 127 <<", ";
  return 0;
}
    • the program outputs 127, 0x7f, 0x7f
    • compilation error in LINE I
    • compilation error in LINE I
    • the program outputs 127, 127, 127,
    • runtime error at LINE II
    • the program outputs 127, 7f, 7f
    • the program outputs 127, 7f, 0x7f

  7.  What happens if you try to compile and run this program?

    #include <iostream>
using namespace std;
int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::hex, ios::basefield); //LINE I
  cout << 127 <<", ";
  cout.setf(ios::showbase); //LINE II
  cout << 127 <<", ";
  return 0;
}
    • the program outputs 127, 127, 127,
    • the program outputs 127, 7f, 0x7f
    • the program outputs 127, 0x7f, 0x7f
    • runtime error at LINE II
    • compilation error in LINE II
    • compilation error in LINE I
    • the program outputs 127, 0x7f, 7f

  8. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 9 8 a<enter> ?

    #include <iostream>
#include <string>

using namespace std;
int
main()
{
  string s;
  getline (cin, s); //LINE I
  cout << s <<", "<< s <<", " <<endl; //LINE II
  return 0;
}
    • the program outputs 9 8 a, 9 8 a,
    • the program outputs 9,
    • compilation error in LINE II
    • compilation error in LINE I
    • the program outputs 9, 8, 
    • runtime error at LINE II
    • the program outputs 9, 9,

  9. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 9.9 8.8 7.7 <enter> ?

    #include <iostream>
using namespace std;

int
main()
{
  double c1, c2, c3;
  cin >> c1 >> c2 >> c3;
  cout << c3 <<", "<< c1 <<", " << c3 <<", " <<endl; //LINE II
  return 0;
}
    • the program outputs 7.7, 8.8, 9.9, 
    • the program outputs 7.7, 9.9, 8.8, 
    • the program outputs 7, 9, 8, 
    • the program outputs 7, 8, 9, 

  10.  What happens if you try to compile and run this program?

    #include <iomanip>
#include <iostream>

using namespace std;
int
main()
{
  double goodpi = 3.1415;
  double badpi = 3.2;
  cout << goodpi <<", ";
  cout << badpi <<", ";
  cout << setprecision (); //LINE I
  cout << goodpi <<", "; //lINE II
  cout << badpi <<", ";
  return 0;
}
    • compilation error in LINE I
    • the program outputs 7, 8, 9,
    • runtime error at LINE II
    • the program outputs 3.1415, 3.2, 3.1, 3.2,
    • the program outputs 3.1415, 3.2, 3.1415, 3.20,
    • the program outputs 3.1415, 3.2, 3.14, 3.20,
    • compilation error in LINE II

  11. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 7 8 9<enter> ?

    #include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;
void
printer (int i)
{
  cout << i <<", ";
}

int
main()
{
  vector <int> v1;
  int i;
  do
  {
    cin >> i;
   v1.push_back(i); //LINE I
  }
  while(i != 9 && !cin.bad()); //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • the program outputs 7, 8
    • runtime error at LINE I
    • the program outputs 7, 8, 9,
    • compilation error in LINE II
    • the program outputs 7, 8, 9, 9,
    • program runs forever without outputs
    • compilation error in LINE I

  12. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 7 8 9<enter> ?

    #include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;
void
printer (int i)
{
  cout << i <<", ";
}

int
main()
{
  vector <int> v1;
  int i;
  do
  {
    cin >> i;
    v1.push_back(i); //LINE I
  }
  while(i != 9 && !cin.bad()); //LINE II
  for_each(v1.begin(), v1.end(), printer);
  return 0;
}
    • the program outputs 7, 8,
    • the program outputs 7, 8, 9, 9,
    • runtime error at LINE I
    • the program outputs 7, 8, 9,
    • compilation error in LINE I
    • compilation error in LINE II
    • program runs forever without output

  13.  What happens if you try to compile and run this program?

    #include <iostream>

using namespace std;

int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::hex, ios::basefield); //LINE I
  cout << 127 <<", ";
  cout.setf(ios::showbase); //LINE II
  cout << 127 <<", ";
  return 0;
}
    • runtime error at LINE II
    • the program outputs 127, 127, 127,
    • the program outputs 127, 7f, 0x7f,
    • the program outputs 127, 0x7f, 0x7f,
    • the program outputs 127, 7f, 7f,
    • compile error in LINE II
    • compile error in LINE I

  14.  What happens if you try to compile and run this program?

    #include <iostream>

using namespace std;

int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::oct, ios::basefield); 
  cout.setf(ios::showbase); //LINE I
  cout << 127 <<", ";
  cout.unsetf(ios::showbase); //LINE II
  cout << 127 <<", ";

  return 0;
}
    • the program outputs 127, 0x177, 177,
    • compile error in LINE II
    • the program outputs 127, 127, 127,
    • compile error in LINE I
    • the program outputs 127, 0177, 177,
    • runtime error at LINE II
    • the program outputs 127, 0177, 0177,

  15.  What happens if you try to compile and run this program?

    #include <iostream>

using namespace std;

int
main()
{
  double goodpi = 3.1415;
  double badpi = 3.2;
  cout << goodpi <<", ";
  cout << badpi <<", ";
  cout.setf(ios_base::showbase); //LINE O
  cout << goodpi <<", "; //LINE II
  cout << badpi <<", ";

  return 0;
}
    • the program outputs 3.1415, 3.2, 3.14150, 3.20000,
    • the program outputs 3.1415, 3.2, 3.14, 3.2,
    • compile error in LINE I
    • the program outputs 3, 3, 3.1415, 3.2
    • the program outputs 3, 3, 3.14, 3.20
    • runtime error at LINE II
    • compile error in LINE II

  16. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: r e w qw q<enter> ?

    #include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

void
printer(string i)
{
cout << i <<", ";
}
int
main()
{
  vector <string> v1;
  string s;
  do
  {
     cin >> s;
     v1.push_back(s); //LINE I
  }
  while(s != "q" && cin.good()); //LINE II
  for_each(v1.begin(), v1.end(), printer);

  return 0;
}
    • the program outputs r, e, w, w
    • compile error in LINE II
    • the program outputs r, e, w, qw, q,
    • the program outputs r, e, w, w, q,
    • compile error in LINE II
    • runtime error at LINE I
    • the program outputs r, e, w, q,

  17. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 9.9 8.8 7.7<enter> ?

    #include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int
main()
{
  double c1, c2, c3;
  cin >> c1 >> c2 >> c3;
  cout << c3 <<", "<< c1 <<", "<< c2 <<", " <<endl;

  return 0;
}
    • the program outputs 7, 8, 9,
    • the program outputs 7.7, 9.9, 8.8,
    • the program outputs 7, 9, 8,
    • the program outputs 7.7, 8.8, 9.9,

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

    #include <iostream>

using namespace std;

int
main()
{
  cout << 127 <<", ";
  cout.setf(ios::hex); //LINE I
  cout << 127 <<", ";
  cout.setf(ios::showbase); //LINE II
  cout << 127 <<", ";
  return 0;
}
    • compilation error in LINE II
    • the program outputs 127, 7f, 7f
    • runtime error at LINE II
    • the program outputs 127, 0x7f, 0x7f
    • the program outputs 127, 127, 127 (but it is unpredictable result)
    • the program outputs 127, 7f, 0x7f
    • compilation error in LINE I

  19.  What happen if you try to compile and run this program?

    #include <iostream>

using namespace std;

int
main()
{
  double goodpi = 3.1415;
  double badpi = 3.2;
  cout << goodpi << ", ";
  cout << badpi << ", ";
  cout.setf (ios_base::showbase); //LINE I
  cout << goodpi << ", "; //LINE II
  cout << badpi <<", ";
  return 0;
}
    • compilation error in LINE II
    • the program outputs 3, 3, 3.14, 3.2
    • the program outputs 3, 3, 3.14, 3.20
    • the program outputs 3.1415, 3.2, 3.14, 3.2,
    • compilation error in LINE I
    • runtime error at LINE II
    • the program outputs 3.1415, 3.2, 3.14150, 3.20000,

  20.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;

int
main()
{
  cout << false <<", "; //LINE I
  cout << boolalpha <<", "; //LINE II
  cout << true << ", ";

  return 0;
}
    • the program outputs 0, 0, true,
    • the program outputs 0, , true,
    • compilation error in LINE II
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs 1, 0, 0,
    • the program outputs 0, 0, 1,