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Replies to This Discussion

Mcqs were easy and from past papers.

Write down the syntax in two different ways to initialize character array with string ‘programming’. 2

Write the C++ code for the declaration of overloaded stream insertion(>>) and stream extraction() operator for the object d  of type Date. 2 marks

What happens when an object is assigned to another object without overloading an assignment operator? 2 marks

Suppose there is a template function ‘func’ having argument of type U and return type T. What will be the C++ syntax to call  this function, when we pass a variable ‘x’ of type double and it is returning an int type? 2 marks

If the requested memory is not available in the system then what does calloc(), malloc() and new operator return? 3 marks

Which one of the given two methods is better to read from a file and Why ? 3 marks

Using stream insertion operator >>
Using get() function

Write a function named Sum which takes an integer as its argument and uses a static integer variable to keep track of the sum  of all values passed to it during the running of a program. 3 marks

Given is the code for nested classes.
class First
{
public:

class Second
{ public:
Second()
{
fValue = 20;
}
void Display();
private:
int fValue;
};
};

Write the code to define Display() member function of class inner class outside the body of outer class. The function  Display() will display the value of data member fValue of class First. 3marks

Briefly explain the logic of given code. Also determine what is the value of ‘counter’ variable if the code below is executed ? 5 marks
main()
{
int num = 5;
int counter=0;
while(num != 0)
{
if ( num & 01)
counter++;
num>>=1;
}
return 0;
}

Using Template (code given) have to write a function square() that takes “x” as double but return its square as integer. 5marks

One question was from the phone example in the handouts. Have to write part of missing code . 5marks

Using manipulation operator show
Virtual——–university (8 – character between them) 5 marks

Cs 201 Fall 2011 Final Term Feb 2012 – VU Current Paper – 03 Feb 2012

Long Question

Q1: Given is the code for a class named Coordinate.(10)

class Coordinate
{

private:

int X, Y;

public:

Coordinate()
{
X = 0;
Y = 0;
}

class Coordinate
{
friend void Displaycord();
private:

int X, Y;

public:

Coordinate()
{
X = 0;
Y = 0;
}

};

Q2: Write a program that defines a Template function named Square () which finds the square of a number and then return it.
Define one variable of type int in main function and then call Square function on that. (10)

Program output should look like this:

Enter an integer value to find its Square: 6
Square of integer number is: 36

Q3: Why is it necessary to initialize a static object as the time of creation and how it is initialized ?(5)

Q4:Transform the following If-else statement into switch statement.(5)

if (x == 5)

else if (x == 10 || x == 11)

else if (x == 8)

else if (x == 9)

else

Q5:Read the given code and explain code functionality. (3)

Matrix :: Matrix ( const Matrix & m )
{
numRows = m.numRows ;
numCols = m.numCols ;
elements = new ( double * ) [ numRows ] ;
for ( int i = 0 ; i < numRows ; i ++ )
{
elements [ i ] = new double [ numCols ] ;
for ( int j = 0 ; j < numCols ; j ++ )
elements [ i ] [ j ] = m.elements [ i ] [ j ] ;
}
}

Hint : This function belong to a matrix class, having
Number of Rows = numRows
Number of Columns = numCols

Q6: In the following code;(3)

#include <iostream.h>
#include <conio.h>
main() {

double j;

getche();

}

Is double j; an example of global variable or local variable ? Why ?

Q7: Identify and correct the error in the given code segment.(3)
main()
{
int val = 30;
int &ref = val;

&ref = &ref++;

}

Q8: Determine the output of the given program code.(2)

for (int I = 1; i<5; i++){
if ( I == 3)
continue;
cout I endl ;
}

Q9: What is the output of following code snippet.(2)

// class templates
#include <iostream>
using namespace std;

template <class T>
class mypair {
T a, b;
public:
mypair (T first, T second)
{a=first; b=second;}
T getmax ();
};

template <class T>
T mypair<T>::getmax ()
{
T retval;
retval = a>b? a : b;
return retval;
}
int main () {
mypair <int> myobject (100, 75);
cout myobject.getmax();
system(“pause”);
}

Q10: How can we declare and initialize static data member of a class?(2)

Q11: When memory is allocated (snow) dynamically using new operator within the constructor of class then what is an appropriate
place to de-allocate the memory?(2)

Q11: Write down the output of the following code segment? (2)

int x[10] = {0,1, 2, 3, 4, 5, 6, 7, 8, 9};
int *xptr;
xptr = &x[5];
cout *(xptr++) + 1;

MCQ
Sequence of event(s) when allocating memory using new operator is ____________.

Assignment operator is ________ associative

To avoid dangling reference, always return _________.
Which value is returned by the destructor of a class?
The functions used for dynamic memory allocation return pointer of type ______.
The function free() returns back the allocated memory got through calloc and malloc to _____ .
At the time of linking, library functions are available in the ________form.
Which of the following is NOT a preprocessor directive?
When we define an array of objects then ___________.
A constructor will create a new object with a full copy of the other object, this type of copy is known as ___________.
When an object of a class is defined inside another class then ______________.
Every stream has _________.
_________in the following options is not a method of output stream.
To perform manipulation with input/output, we have to include ________ header file
A class whose object is contained as const object, must have ____________.
By using objects as class members, _________ is achieved
The operator function will be implemented as _____, if both objects (obj1, obj2) are passed as arguments to – operator in the
statement given below.
obj3 = obj1 – obj2;

ANSI stands for _________.
A template function must have at least _______________ generic data type.

Which of the following is true about operator overloading?
1-The operator works with only objects of the class in which it is overloaded.
2-The operator works with objects and primitive data types regardless of parameters.
3-The operator works with both objects and primitive data types depending on parameters.
4-The operator must have a constant and an object as parameters.
Operator overloading can be performed through__________________.
The pointer returned by the new operator points to ___________ of memory chunks allocated by the new operator.

The return type of the operator function for operator is __________.

What will be the output of following statement?

cout setfill(‘0’) setw(7) 128 ;

The operator used for casting in C is standard ________ operator.

Consider the following code segment.

struct intorDouble
{
Int ival;
Double charvar;
};

main()
{
intorDouble VAZ;
int size ;
size = sizeof(VAZ);
}

What will be the value of variable size if integer occupies 4 bytes and double occupies 8 bytes?

The file-open mode __________ is used to open a file for output and move to the end of the file.

In the statement int &x = y; compiler ______.
Which header file must be included to use the functions tolower() and toupper()?
Which one of the following functions is included in stdlib.h header file?
For one byte, there are _____ combinations of values which can be stored in computer.
Which of the following statement is best regarding declaration of friend function?
Answer- It can be declared anywhere in class as these are not affected by the public and private keywords.
The operator used for dereferencing the elements of an array using a pointer is _________.
The __________ statement forces the immediate next iteration of the loop.
A function is a block of statements (code) that can be __________.
Which of the following values are used in C/C++ to represent true and false?
Ans- 1 and 0
The dynamic memory allocation uses memory from the ____________.
In C/C++, null character is represented as ________________.

Nice 

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