Sunday, June 5, 2011

CS201 Final Term Past Solved Paper


FINALTERM  EXAMINATION
Spring 2010
CS201- Introduction to Programming
Ref No:
Time: 90 min
Marks: 58
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Exam Date:




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Question No: 1      ( Marks: 1 ) - Please choose one
 

*.doc is _____________ by type.
.


       Sequential File


       Random Access File


       Data File


       Record File
                                                                                           




Question No: 2      ( Marks: 1 ) - Please choose one
 

Which of the following is NOT a preprocessor directive?


       #error

       #define


       #line


       #ndefine







Question No: 3      ( Marks: 1 ) - Please choose one
 

The return type of operator function must always be void.


       True

       False



Question No: 4      ( Marks: 1 ) - Please choose one
 
What does (*this) represents?
 http://vustudents.ning.com/


       The current function of the class


       The current pointer of the class


       The current object of the class


       A value of the data member




Question No: 5      ( Marks: 1 ) - Please choose one
 
The statement cin.get (); is used to,



       Read a string from keyboard


       Read a character from keyboard


       Read a string from file


       Read a character from file




Question No: 6      ( Marks: 1 ) - Please choose one
 When we do dynamic memory allocation in the constructor of a class, then it is necessary to provide a destructor. http://vustudents.ning.com/



       True



       False




Question No: 7      ( Marks: 1 ) - Please choose one
 Overloaded new operator function takes parameter of type size_t and returns

       void (nothing)


       void pointer


       object pointer


       int pointer





Question No: 8      ( Marks: 1 ) - Please choose one
 

The second parameter of operator functions for << and >> are objects of the class for which we are overloading these operators.



       True

       False



Question No: 9      ( Marks: 1 ) - Please choose one
 C++ is a case-sensitive language http://vustudents.ning.com/

       True

       False

Question No: 10      ( Marks: 1 ) - Please choose one
 To include code from the library in the program, such as iostream, a directive would be called up using this command.

       #include “iostream.h”

       include <iostream.h>

       include <iostream.h>

       #include <iostream.h>



Question No: 11      ( Marks: 1 ) - Please choose one
 A template function must have only generic data types.


       True

       False



Question No: 12      ( Marks: 1 ) - Please choose one
 Template class can not have static variables.

       True

       False



Question No: 13      ( Marks: 1 ) - Please choose one
 

What will be the correct syntax to assign an array named arr of 5 elements to a pointer ptr? http://vustudents.ning.com/


       *ptr = arr ; 


       ptr = arr ;


       *ptr = arr[5] ;


       ptr = arr[5] ; 





Question No: 14      ( Marks: 1 ) - Please choose one
 

What will be the correct syntax to access the value of fourth element of an array using pointer ptr?


       ptr[3]

       (ptr+3)

       *(ptr+3)

       Both 1and 3



Question No: 15      ( Marks: 1 ) - Please choose one
 If most significant bit of un-signed number is 1 then it represents a positive number.


       True

       False



Question No: 16      ( Marks: 1 ) - Please choose one
 If there is a symbol (& sign) used with the variable name followed by data type then it refers to _____ and if & is being used with variable name then it refers to _____.
http://vustudents.ning.com/



       Address of variable, reference variable

       Reference variable, value of variable

       Reference variable, address of variable

       Address of variable, value of variable



Question No: 17      ( Marks: 1 ) - Please choose one
 We can also do conditional compilation with preprocessor directives.

       True

       False



Question No: 18      ( Marks: 1 ) - Please choose one
 The default value of a parameter can be provided inside the ________________

       function prototype

       function definition

       both function prototype or function definition

       none of the given options.






Question No: 19      ( Marks: 1 ) - Please choose one
 Classes defined inside other classes are called ________ classes

       looped

       nested

       overloaded

       none of the given options.



Question No: 20      ( Marks: 1 ) - Please choose one
 What purpose do classes serve?


       Data encapsulation

       Providing a convenient way of modeling real-world objects


       Simplifying code reuse


       All of the given options





Question No: 21      ( Marks: 1 ) - Please choose one
 Every class contains _______________.



       Constructor


       Destructor


       Both a constructor and a destructor


       None of the given options




Question No: 22      ( Marks: 1 ) - Please choose one
 new operator is used to allocate memory from the free store during


       Compile Time


       Run Time


       Link Time


       None of the given options


Question No: 23      ( Marks: 1 ) - Please choose one
 When an object of a class is defined inside another class then,


      Destructor of enclosing class will be called first


  Destructor of inner object will be called first

       Constructor and Destructor will be called simultaneously

       None of the given options



Question No: 24      ( Marks: 1 ) - Please choose one
 It is possible to define a class within another class.


       True

       False

Question No: 25      ( Marks: 1 ) - Please choose one
 New and Delete are also used with ___________ and data types as well.


       Class, Objects


       Structures, Pointers


       Both Class and structures


       None of above


Question No: 26      ( Marks: 1 ) - Please choose one
 With New keyword, data types and class members are initialized with meaningful values instead of garbage. http://vustudents.ning.com/
 

       True


       False



Question No: 27      ( Marks: 2 )
 How many arguments a Unary Operator take? Can we make a binary operator as unary operator?
Ans: Unary operator takes only one aurgument like i++ or i— (Post increment or post decrement operators for intergers) or ++i,--i  (Pre increment or pre decrement operators for intergers) ,we can not make Unary operator as binary or binary as Unary operator.



Question No: 28      ( Marks: 2 )
 Which arithmetic operators cannot have a floating point operand?
Ans:
Modulus operator
This operator can only be used with integer operands ONLY













Question No: 29      ( Marks: 2 )
 What are manipulators? Give one example.

Ans:
The manipulators are like something that can be inserted into stream, effecting a change in the behavior. For example, if we have a floating point number, say pi (ะป), and have written it as float pi = 3.1415926 ; Now there is need of printing the value of pi up to two decimal places i.e. 3.14 . This is a formatting functionality. For this, we have a manipulator that tells about width and number of decimal points of a number being printed.
Some manipulators are parameter less. We simply use the name of the manipulator that works. For example, we have been using endl, which is actually a manipulator, not data. When we write cout << endl ; a new line is output besides flushing the buffer. Actually, it manipulates the output stream.
http://vustudents.ning.com/

Question No: 30      ( Marks: 2 )
 Write down piece of code that will declare a matrix of 3x3. And initialize all its locations with 0;
Ans:
int matrix [3] [3] ;

matrix [0] [0] = 0;
matrix [0] [1] = 0;
matrix [0] [2] = 0;
matrix [1] [0] = 0;
matrix [1] [2] = 0;
matrix [1] [2] = 0;
matrix [2] [0] = 0;
matrix [2] [1] = 0;
matrix [2] [2] = 0;


we can also do it as given below

int matrix [3][3] = { 0 }; //all elements 0 


Question No: 31      ( Marks: 3 )
 Which one (copy constructor or assignment operator) will be called in each of the following code segment?
1)         Matrix m1 (m2);
2)         Matrix m1, m2;
m1 = m2;
3)         Matrix m1 = m2;

Ans:
1)         Matrix m1 (m2);   copy constructor
2)         Matrix m1, m2;   
m1 = m2;              assignment operator
3)         Matrix m1 = m2;  assignment operator


Question No: 32      ( Marks: 3 )
 What will be the output of following function if we call this function by passing int 5?

template <class T>
T reciprocal(T x)
{
return (1/x);
}

Ans:
1/5



Question No: 33      ( Marks: 3 )
 Identify the errors in the following member operator function and also correct them.
math * operator(math m);

math * operator (math m)
{
     math temp;
     temp.number= number * number;
     return number;
   
}
ANS:
The errors are in the arguments of the member operation function and also in the body of operator member function.

Correct function should be

math *operator(math *m);

math *operator (math *m)
{
     math temp;
     temp = m;
     temp.number= number * number;
     return temp.number;
   
}




Question No: 34      ( Marks: 5 )
 Write a program which defines three variables of type double which store three different values including decimal points, using setprecision manipulators to print all these values with different number of digits after the decimal number.

Ans:
#include <iostream>
#include <iomanip>

int main ()
{
  double x1 = 12345624.72345
double x2 =  987654.12345
double x3 =  1985.23456
  cout << setprecision (3) << x1<< endl;
  cout << setprecision (4) << x2 << endl;
cout << setprecision (5) << x3<< endl;
http://vustudents.ning.com/
  return 0;
}



Question No: 35      ( Marks: 5 )
 What are the advantages and disadvantages of using templates?


Ans:
Many thing can be possible without using templates but it do offer several clear advantages not offered by any other techniques:
Advanatages:
 • Templates are easier to write than writing several versions of your similar code for different types. You create only one generic version of your class or function instead of manually creating specializations.
• Templates are type-safe. This is because the types that templates act upon are known at compile time, so the compiler can perform type checking before errors occur.
 • Templates can be easier to understand, since they can provide a straightforward way of abstracting type information.
• It help in utilizing compiler optimizations to the extreme. Then of course there is room for misuse of the templates. On one hand they provide an excellent mechanism to create specific type-safe classes from a generic definition with little overhead.
Disadvantages:
On the other hand, if misused
• Templates can make code difficult to read and follow depending upon coding style.
• They can present seriously confusing syntactical problems esp. when the code is large and spread over several header and source files.
 • Then, there are times, when templates can "excellently" produce nearly meaningless compiler errors thus requiring extra care to enforce syntactical and other design constraints. A common mistake is the angle bracket problem.



Question No: 36      ( Marks: 5 )
 Suppose a program has a math class having only one data member number.
Write the declaration and definition of operator function to overload + operator for the statements of main function.
         math obj1, obj2;
         obj2= 10 + obj1  ;  
Ans:
#include <iostream.h>
math
{
mth operator + (obj1,obj2)
mth operator + (obj1,obj2)
{
 mth operator + (obj1,obj2)
mth operator + (obj1,obj2)

}
}

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