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CS253 IQ 06

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is-a

class Unikitty { };
class Puppycorn : public Unikitty {
    int dr_fox;
};

Which of these is true?

1. Unikitty is-a Puppycorn
2. Unikitty is-a dr_fox
3. Puppycorn is-a Unikitty
4. Puppycorn is-a dr_fox
5. dr_fox is-a Unikitty
6. dr_fox is-a Puppycorn

has-a

class Unikitty { };
class Puppycorn : public Unikitty {
    int dr_fox;
};

Which of these is true?

1. Unikitty has-a Puppycorn
2. Unikitty has-a dr_fox
3. Puppycorn has-a Unikitty
4. Puppycorn has-a dr_fox
5. dr_fox has-a Unikitty
6. dr_fox has-a Puppycorn

Inheritance

Can private methods in a derived class call private methods in the base class?

1. Yes, a derived class has full access to the base class methods.
2. Yes, if the base class methods are declared as public in the derived class.
3. No—private!

--

Which method is the best way to make Foo f; f--; work?

1. operator--()
2. operator--(int)
3. Foo operator--()
4. Foo operator--(int)
5. Foo &operator--()
6. Foo &operator--(int)

stringstream

What will this code produce?

ostringstream oss;
oss = "Flying Spaghetti Monster";
cout << oss.str();

c.cc:2: error: no match for 'operator=' in 'oss = "Flying Spaghetti Monster"' 
   (operand types are 'std::ostringstream' {aka 
   'std::__cxx11::basic_ostringstream<char>'} and 'const char [25]')

1. Flying
2. Flying Spaghetti Monster
3. 6
4. 24
5. None of the above

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