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URD101
CS304_Midterm_Spring, 2012 (12-05-2012) By Nadeempomy
CS304_Midterm_Spring, 2012 (12-05-2012)
By Nadeempomy
Q.1
Identify which of the following overloaded operator function’s declaration is appropriate for the given call?
Rational_number_1 + 2.325 Where Rational_number_1 is an object of user defined class Rational_number.
► Rational_number operator+( Rational_number & obj);
► Rational_number operator+(double& obj); (Page 145)
► Rational_number operator+(Rational_number &obj, double& num);
► operator+(double& obj);
Q. 2
Which operator can not be overloaded?
► ::
► >>
►
► /p>
Q. 3
To convert from a user-defined class to a basic type, you would most likely use
► a built-in conversion operator.
► a one-argument constructor.
► an overloaded = operator. (May be this one)
► a conversion operator that’s a member of the class. (May be this one)
Q. 4
A C++ class is similar to --------------------
► Structure
► Header File
► Library File
► None of the given
Q. 5
A class can be identified from a statement by -------------
►Noun (Page 58)
►Pronoun
►Verb
►Adverb
Q. 6
Suppose there is an object of type Person, which of the following can be considered as one of its attributes
► Name
► Age
► Work()
► Both Name and Age (page 13)
Q. 7
Assume a class C with objects obj1, obj2, and obj3. For the statement obj3 = obj1 - obj2 to work correctly, if the overloaded - operator must
► take two arguments. (Doubted)
► return a value (Doubted)
► create a named temporary object.
► take four arguments
Q. 8
Using encapsulation we can achieve
► Information hiding, least interdependencies & implementation dependence
► Inheritance, Information Hiding, Abstraction
► Information Hiding, Polymorphism, Abstraction
►
Q. 9
Abstraction is
►
►
►
►
Q. 10
Abstract Class has
► Zero Instance
► One Instance
► Two Instance
► Many Instance
Q. 11
If constructor in not initialized then
► Compiler will give error message
► Compiler will give warning
► Compiler will initialize zero by default
►
Q. 21 (2)
Differentiate Unary & Binary operators from the followings:
%, &, &&, *, --, =, /
Q. 22 (2)
What is “anonymous base class” object? Explain with example
Q. 23 (3)
Justify the statement “getter is the good programming practice”.
Q. 24 (3)
Give C++ code to overload assignment operator for string class
Q. 25 (5)
How we resolve the following problems in overloading of assignment operator in string class, (explain with the help of c++ code) Self referencing Assigning a string value to more than one strings in a single line like, stringobject1 = string object2 = stringobject3 = stringobject4
Ans.
Handout Page:150
class String{
…
public:
…
String & operator = (const String &);
};
String & String :: operator = (const String & rhs){
size = rhs.size;
delete [] bufferPtr;
if(rhs.size != 0){
bufferPtr = new char[rhs.size+1];
strcpy(bufferPtr,rhs.bufferPtr);
}
else bufferPtr = NULL;
return *this;
}
Q. 26 (5)
Detect and correct compile time error(s) in the following code:
class Exam
{
char *ExamName;
int No_of_paper;
public:
Exam()
{
ExamName = "Final Term";
No_of_paper = 5;
}
void setname( char* name) const
{
ExamName = name;
}
void setpaper(int paper) const
{
No_of_paper = paper;
}
char* getname()
{
return ExamName;
}
int getpaper()
{
return No_of_paper;
}
};
int main()
{
const Exam exam1;
cout " Exam = "exam1.getname()endl;
cout " Numbe of paper = " exam1.getpaper();
getch();
return 0;
}
Answer:- Corrected Code
class Exam
{
char *ExamName;
int No_of_paper;
public:
Exam()
{
ExamName = "Final Term";
No_of_paper = 5;
}
void setname( char* name)
{
ExamName=name;
}
void setpaper(int paper)
{
No_of_paper = paper;
}
char* getname()
{
return ExamName;
}
int getpaper()
{
return No_of_paper;
}
};
int main()
{
Exam exam1;
cout " Exam = "exam1.getname()endl;
cout " Numbe of paper = " exam1.getpaper();
getch();
return 0;
}
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