What is the output from this C++ code segment?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  int x = 2, y = 3;
    7	  cout << x/y << "!";
    8	  
    9	  double p = 2.0, q = 3.0;
   10	  cout.setf(ios::fixed);
   11	  cout.precision(4);
   12	  cout << p/q << endl;
   13	
   14	  return 0;
   15	}

1. 0!0.6666
2. 0!0.6667
3. 0.0000!0.6667
4. 0.6666!0.6667

1. int x = 6.5;
   

2. int x;
   x = 6.5;
   

3. double x;
   x(6.5);
   

4. double x(6.5);
   

What is the type of the constant 0?

1. short
2. int
3. long
4. float
5. double

What is the type of the constant 0.0?

1. short
2. int
3. long
4. float
5. double

What is the output of the following statement?

    cout << "\"Hello\\Goodbye\"";

1. Hello\\Goodbye
2. "Hello\\Goodbye"
3. Hello\Goodbye
4. "Hello\Goodbye"

What is the output of the following statement?

	cout << "Hello\nGoodbye";

1. Hello\nGoodbye
2. HellonGoodbye
3. Hello Goodbye
4. Hello
   Goodbye

What is the syntax error in the following code?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  const int x;
    7	
    8	  cout << "x = " << x << endl;
    9	
   10	  return 0;
   11	}

1. There is no syntax error.
2. A const declaration must include an initialization.

The following program has no compilation errors. What is the output?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  int x;
    7	
    8	  cout << "x = " << x << endl;
    9	
   10	  return 0;
   11	}

1. x = 0
2. x = 4
3. x = -858993460
4. Not defined, will be: x = some number

What is the output of the following code?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  int x = 8;
    7	  double y;
    8	
    9	  x++;
   10	  y = x/8;
   11	
   12	  cout.precision(4);
   13	  cout.setf(ios::showpoint);
   14	  cout << y << endl;
   15	
   16	  return 0;
   17	}

1. 1.000
2. 1.0000
3. 1.125
4. 1.1250

If line 13 is removed from the code in the previous problem, what is the output?

1. 1
2. 1000
3. 1.250
4. 1250

Line 14 has been added and line 10 has been changed. What is the output?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  int x = 8;
    7	  double y;
    8	
    9	  x++;
   10	  y = x/8.0;
   11	
   12	  cout.precision(4);
   13	  cout.setf(ios::showpoint);
   14	  cout.setf(ios::fixed);
   15	  cout << y << endl;
   16	
   17	  return 0;
   18	}

1. 1.000
2. 1.0000
3. 1.125
4. 1.1250

If two operands of the division operator / are both of type int, integer division is used and any fractional part is discarded even if the result is assigned to a variable of type double.

A type cast can be inserted by a programmer to force conversion of one of two int operands of division to be of type double.

Assume the following declarations/with initializations of x and y:

int x = 3, y = 2;
double z;

Which of the following will correctly assign the value 1.5 to z?

 A: z = (double) (x / y);
 B:z = (double) x / y;
 C: z = ((double) x) / y;
 D: z = static_cast<double>(x / y);
 E: z = static_cast<double>(x) / y;

1. A and D only
2. C and E only
3. B, C, and E only
4. E only

The user accidentally hits the 'enter' key, then a 5, 'enter' again, then a 10 and 'enter' a third time. What is the output of the following code?

    1	#include <iostream>
    2	using namespace std;
    3	
    4	int main()
    5	{
    6	  int x, y;
    7	
    8	  cin >> x;
    9	  cin >> y;
   10	
   11	  cout << "x = " << x << ", y = " << y << endl;
   12	
   13	  return 0;
   14	}

1. x = 0, y = 5
2. x = some undefined value, y = 5
3. x = some undefined value, y = 10
4. x = 5, y = 10

The variable x is declared and initialized, then y is declared and assigned an expression:

int x = 5;
int y;
y = x++ + 10;

What are the values of x and y after this code executes?

1. x = 5, y = 15
2. x = 5, y = 16
3. x = 6, y = 15
4. x = 6, y = 16

If x = 345 which expression will assign the value 4 to y?

1. y = x / 10;
2. y = x % 10;
3. y = (x / 10) % 10;
4. y = (x % 10) / 10;

Which of the following expressions will output the value of an int variable x on one line and an int variable y on the next output line?

A: cout << x;
   cout << y;

B: cout << x << endl;
   cout << y << endl;

C: cout << x << y;

D: cout << x << endl << y << endl;
   

1. A, B, and D only
2. B and D only
3. B only
4. A, B, C, and D

The << operator is overloaded - it can either be the output insertion operator or the left-shift operator. If both operands are of type int, it is the left-shift.

What is the printed output of this code?

#include <iostream>
using namespace std;
int main()
{
  int x = 5;
  int a,b;
 
  a = x << 1;
  b = x << 2;

  cout << a << ", " b << endl;

  return 0;
}

1. 10, 20
2. 51, 52
3. 6,7
4. 5,10

What is the output of the following C++ program?

#include <iostream>
using namespace std;

int main()
{
  int x = 5;
  int y = 2;

  cout << x << y << " ";
  cout << (x << y) << endl;

  return 0;
}

1. 5 2 5 2
2. 52 52
3. 5 2 20
4. 52 20