int f() {
int I = 12;
int &r = I;
r += r / 4;
int *p = &r;
*p += r;
return I;
}
Referring to the sample code above, what is the return value
of the function "f()"?
a) 12
b) 15
c) 24
d) 17
e) 30
catch(exception &e)
{
. . .
}
Referring to the sample code above, which one of the
following lines of code produces a written description of
the type of exception that "e" refers to?
a) cout << e.type();
b) cout << e.name();
c) cout << typeid(e).name();
d) cout << e.what();
e) cout << e;
template<class T, class X> class Obj {
T my_t;
X my_x;
public:
Obj(T t, X x) : my_t(t), my_x(x) { }
};
Referring to the sample code above, which one of the
following is a valid conversion operator for the type T?
a) T operator T () { return my_t; }
b) T operator(T) const { return my_t; }
c) operator(T) { return my_t; }
d) T operator T (const Obj &obj) { return obj.my_t; }
e) operator T () const { return my_t; }
class X
{
public:
int x;
static void f(int z);
};
void X::f(int y) {x=y;}
What is the error in the sample code above?
a) The class X does not have any protected members.
b) The static member function f() accesses the non-static z.
c) The static member function f() accesses the non-static x.
d) The member function f() must return a value.
e) The class X does not have any private members.
The "virtual" specifier in a member function enables which
one of the following?
a) Monmorphism
b) Late binding
c) Metamorphism
d) Solomorphism
e) Inheritance
Which one of the following describes characteristics of
"protected" inheritance?
a) The base class has access only to the public or protected
members of the derived class.
b) The derived class has non-public, inheritable, access to
all but the private members of the base class.
c) The derived class has access to all members of the base
class.
d) The private members of the base class are visible within
the derived class.
e) Public members of the derived class are privately
accessible from the base class.
class Foo {
public:
Foo(int i) { }
};
class Bar : virtual Foo {
public:
Bar() { }
};
Bar b;
Referring to the above code, when the object 'b' is defined,
a compiler error will occur. What action fixes the compiler
error?
a) Adding a virtual destructor to the class Bar
b) Adding a constructor to Bar which takes an int parameter
c) Adding "Foo()" to the Bar constructor
d) Adding a copy constructor to the class Foo
e) Adding "Foo(0)" to the Bar::Bar initializer list
class Foo {
const int x;
protected:
Foo(int f);
~Foo();
};
Foo f;
Referring to the sample code above, why will the class
declaration not compile?
a) The variable x is const.
b) The destructor is protected.
c) The destructor is not public.
d) The constructor is protected.
e) There is no default constructor.
class X
{
private:
int a;
protected:
X(){cout<<"X constructor was called"<<endl;}
~X(){cout<<"X destructor was called"<<endl}
};
Referring to the code above, which one of the following
statements regarding "X" is TRUE?
a) X is an abstract class.
b) Only subclasses of X may create X objects.
c) Instances of X cannot be created.
d) X objects can only be created using the default copy
constructor.
e) Only friends can create instances of X objects.
class HasStatic {
static int I;
};
Referring to the sample code above, what is the appropriate
method of defining the member variable "I", and assigning it
the value 10, outside of the class declaration?
a) HasStatic I = 10;
b) int static I = 10;
c) static I(10);
d) static I = 10;
e) int HasStatic::I = 10;
class Foo {
int x;
public:
Foo(int I);
};
If a class does not have a copy constructor explicitly
defined one will be implicitly defined for it. Referring to
the sample code above, which one of the following
declarations is the implicitly created copy constructor?
a) Foo(Foo *f);
b) Foo(Foo &f);
c) Foo(const Foo *f);
d) Foo(const Foo &f);
e) Foo(int);
class Alpha {
public:
char data[10000];
Alpha();
~Alpha();
};
class Beta {
public:
Beta() { n = 0; }
void FillData(Alpha a);
private:
int n;
};
How do you make the above sample code more efficient?
a) If possible, make the constructor for Beta private to
reduce the overhead of public constructors.
b) Change the return type in FillData to int to negate the
implicit return conversion from "int" to "void".
c) Make the destructor for Alpha virtual.
d) Make the constructor for Alpha virtual.
e) Pass a const reference to Alpha in FillData
class basex
{
int x;
public:
void setx(int y) {x=y;}
};
class derived : basex {};
What is the access level for the member function "setx" in
the class "derived" above?
a) private
b) local
c) global
d) public
e) protected
string somestring ;
Which of the following choices will convert a standard C++
string object "somestring" to a C string?
a) Copy.somestring () ;
b) somestring.c_str ()
c) &somestring [1]
d) std::cstring (somestring)
e) (char *) somestring
class professor {};
class teacher : public virtual professor {};
class researcher : public virtual professor {};
class myprofessor : public teacher, public researcher {};
Referring to the sample code above, if an object of class
"myprofessor" were created, how many instances of professor
will it contain?
a) 0
b) 1
c) 2
d) 3
e) 4
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