INO Flutter interview #3

//---------- 1 ----------
//что будет напечатано в консоли?
void main() async {
  methodA();
  await methodB();
  await methodC('main');
  methodD();
}

methodA(){
  print('A');
}

methodB() async {
  print('B start');
  await methodC('B');
  print('B end');
}

methodC(String from) async {
  print('C start from $from');

  Future((){  // <== This code will be executed some time in the future
    print('C running Future from $from');
  }).then((_){
    print('C end of Future from $from');
  });

  print('C end from $from');
}

methodD(){
  print('D');
}

//---------- 2 ----------
//сколько экземпляров DateTime будет создано в процессе выполнения кода?
extension Printed on DateTime {
  static DateTime printedNow() {
    print("DateTime created!");
    return DateTime.now();
  }
}


class CalendarHelper {
   static final today = Printed.printedNow();

  bool isToday(DateTime date) {
    return date.year == today.year && date.month == today.month && date.day == today.day;
  }
  }

void main() {
  final list = List<CalendarHelper>.generate(50, (index) => CalendarHelper());

  print(list.last.isToday(Printed.printedNow()));
}

//---------- 3 ----------
//что будет напечатано в консоли?
int a;
int b;

a = 0;
b = ++a;
print(a == b);

a = 0;
b = a++;
print(a == b);