ALCCS
FEBRUARY 2009
NOTE:
· Question 1 is compulsory and
carries 28 marks. Answer any FOUR questions from the rest. Marks are indicated against each question.
· Parts of a question should be
answered at the same place.
Q.1 (7
x 4)
a. Define the following terms
(i)
Inheritance
(ii) Friend
function
(iii)
Abstract class
(iv)
b. Explain the shortcomings of
Procedure oriented languages.
c. Define operator overloading with the help of
an example.
d. What is pure virtual function? How it is
implemented in C++?
e. What is a template class? Give an example to
define a template member function outside a template class.
f. Write the specification for an exception
class that stores an error number and error name. Include a constructor.
g.
Give the Stream Class hierarchy of classes used for simple input/output and
file input/output. Also state the purpose of each class in the hierarchy.
Q.2 a. Write a function that reverses a C-String
(an array of characters). Use a for
loop that swaps the first and last characters, then the second and next-to-last
characters and so on. The string should be passed to the function as an
argument. (6)
b. Differentiate among local, static and global
variable in terms of scope and life- time. (6)
c. Differentiate
between a member function and static member function in C++ (6)
Q.3 a. Write six differences between a structure and
class in C++. (6)
b. Write a C++ program that creates a class time
with two integers and in one float as hour, minute, and seconds respectively.
There should be two constructors one for initializing these values to zero and
other for initializing them to fixed values. In case seconds are not given, it
should be automatically initialized to zero. A member function should display
time in 02:45:67.05 format. There should also be member function that adds two
time objects. (6)
c. Give the semantics (meaning) of the following
declarations:
(i) char
**pt
(ii) int (*array) [10]
(iii) int *array [10]
(iv) void (*funct)()
(v) char (*(*X())[]) ()
(vi) char (*(*X[5])()) [10] (6)
Q.4 a. What are advantages of virtual function? How to obtain dynamic
polymorphism in C++ in the absence of virtual function? (6)
b. How is it possible to have multiple inputs and
outputs in a single cin and cout statement respectively? (6)
c. What is friend class? Give an example where
use of friend class/function is necessary. (6)
Q.5 a. Write classes in C++ to create a queue of
items and display the items stored in the queue. Items may be of type integer,
string, float and user defined. (Note: do not use struct
in the program) (6)
b. Write a class complex in C++. It has
two data members of type integer one for real part and other for imaginary
part. Also write functions that can overload assignment and increment operators
both prefix and suffix. (6)
c. What is virtual base class? Explain with the
help of an example. (6)
Q.6 a. Define the min() used in the following
program segment as macro and template Function. Give the output of the program
for both cases when min is macro and template function. (6)
int main() {
int
elmcount=0; int *p = &ia[0];
while(min(p++,
&ia[size]) != &ia[size])
++elmcount;
cout
<< “elemnet count : “ << elmcount << “\texpecting: “
<< size
<< endl;
return 0;
}
b. What is exception handling? What are the
sequence of events when an exception occurs? Write a C++ program that uses
exception to handle the errors caused when a stack is full or empty. (6)
c. Using stream and files write a C++ program
that copy the contents of a text file to another text file. Invoke the program
with two command-line arguments. (6)
Q.7 a. Differentiate among private, public and
protected access modifiers. Also explain their meaning when a derived class
inherits from a base class using public, protected or private keywords. (6)
b. Write short notes any two of the following:
(i) inline function
(ii) persistence
(iii)
Polymorphism
(iv)
late binding (12)