If x = 1, y = 3, z = 0, the value of x, y, and z after executing the following c

Question

If x = 1, y = 3, z = 0, the value of x, y, and z after executing the following code fragment is x = 2, y = 3, z = 0.
switch ( x )
      {    case 0 : x = 2 ;
                              y = 3 ;
                              break ;
              case 1 : x = 4 ;
                              break ;
             default   : y = 3 ;
                              x = 1 ;
      }

True

False

________________

If x = 0, y = 5, z = 5, what is the value of x, y, and z after executing the following code fragment?
if (x == 0)
     {   x = x - 3 ;
          z = z + 3 ;
     }
else
    y = 99 ;

Choose one answer:

a)x = 0, y = 99, z = 5

b)x = -3, y = 5, z = 8

c)x = -3, y = 5, z = 5

d)x = -3, y = 99, z = 8

a)x = 0, y = 99, z = 5

b)x = -3, y = 5, z = 8

c)x = -3, y = 5, z = 5

d)x = -3, y = 99, z = 8

Explanation / Answer

If x = 1, y = 3, z = 0, the value of x, y, and z after executing the following code fragment is x = 2, y = 3, z = 0.
switch ( x )
{
   case 0 : x = 2 ;
             y = 3 ;
           break ;
   case 1 : x = 4 ;
           break ;
   default : y = 3 ;
              x = 1 ;
}
False

since initially x= 1 case 1 of switch statement will be executed which assigns x = 4;
so after executing switch statement, x = 4, y = 3, z = 0.

If x = 0, y = 5, z = 5, what is the value of x, y, and z after executing the following code fragment?
if (x == 0)
     {   x = x - 3 ;
          z = z + 3 ;
     }
else
    y = 99 ;

since, initially x = 0, if statement will be executed which assigns x = 0-3 = -3 and z = 5+3 = 8

so correct answer is

b)x = -3, y = 5, z = 8

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