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Thursday, December 30, 2010

CS201- Introduction to Programming Final Term SOLVED Paper 2008

FINALTERM  EXAMINATION
Fall 2008
CS201- Introduction to Programming
Time: 120 min                                                                                               Marks: 75
Question No: 1      ( Marks: 1 ) - Please choose one
There are mainly -------------------- types of software
       Two
       Three
       Four
       Five
Question No: 2      ( Marks: 1 ) - Please choose one
seekg() and write() are functionally _________________ .
       ► Different
       Identical
       Two names of same function
       None of the above
Question No: 3      ( Marks: 1 ) - Please choose one
 When a pointer is incremented, it actually jumps the number of memory addresses
       According to data type
       1 byte exactly
       1 bit exactly
       A pointer variable can not be incremented
Question No: 4      ( Marks: 1 ) - Please choose one
setw is a parameterized manipulator.
       True
       False
Question No: 5      ( Marks: 1 ) - Please choose one
 eof( ), bad( ), good( ), clear( ) all are manipulators.
       True
       False
Question No: 6      ( Marks: 1 ) - Please choose one
In functions that return reference, use __________variables.
       Local
      Global
       ► Global or static
       None of the given option
Question No: 7      ( Marks: 1 ) - Please choose one
The declarator of Plus (+) member operator function is
       Class-Name  operator + (Class-Name  rhs)
       operator Class-Name + ( )
      operator Class-Name + ( rhs)
       Class-Name  operator + ( )
Question No: 8      ( Marks: 1 ) - Please choose one
The compiler does not provide a copy constructor if we do not provide it.
       ► True
       False


Question No: 9      ( Marks: 1 ) - Please choose one
What is the functionality of the following syntax to delete an array of 5 objects named arr allocated using new operator?
delete arr ;
       Deletes all the objects of array
       Deletes one object of array 
       Do not delete any object
       ► Results into syntax error
Question No: 10      ( Marks: 1 ) - Please choose one
What is the sequence of event(s) when allocating memory using new operator?
      Only block of memory is allocated for objects
       Only constructor is called for objects
       ► Memory is allocated first before calling constructor
       Constructor is called first before allocating memory
Question No: 11      ( Marks: 1 ) - Please choose one
What is the sequence of event(s) when deallocating memory using delete operator?
       Only block of memory is deallocated for objects
       Only destructor is called for objects
       Memory is deallocated first before calling destructor
       ► Destructor is called first before deallocating memory
Question No: 12      ( Marks: 1 ) - Please choose one
new and delete operators cannot be overloaded as member functions.
       True
       False
Question No: 13      ( Marks: 1 ) - Please choose one
The operator function of << and >> operators are always the member function of a class.
       True
       False
Question No: 14      ( Marks: 1 ) - Please choose one
A template function must have at least ---------- generic data type
       Zero
       One
       Two
       ► Three
Question No: 15      ( Marks: 1 ) - Please choose one
If we do not mention any return_value_type with a function, it will return an _____ value.
       ► int
       void
       double
       float
Such function which do not return any value are called:
       ► int
       void
       double
       float


Question No: 16      ( Marks: 1 ) - Please choose one
Suppose a program contains an array declared as int arr[100]; what will be the size of array?
       0
       99
       100
       101
Question No: 17      ( Marks: 1 ) - Please choose one
The name of an array represents address of first location of array element.
       True
       False
Question No: 18      ( Marks: 1 ) - Please choose one
Reusing the variables in program helps to save the memory
       ► True
       False
Question No: 19      ( Marks: 1 ) - Please choose one
Which of the following option is true about new operator to dynamically allocate memory to an object?
       The new operator determines the size of an object
       ► Allocates memory to object and returns pointer of valid type
       Creates an object and calls the constructor to initialize the object
       All of the given options
Question No: 20      ( Marks: 1 ) - Please choose one
new and delete are _____ whereas malloc and free are _____.
       Functions, operators
       Classes, operators
       ► Operators, functions
       Operators, classes
Question No: 21      ( Marks: 1 ) - Please choose one
Like member functions, ______ can also access the private data members of a class.
       Non-member functions
       ► Friend functions
       Any function outside class
       None of the given options
Question No: 22      ( Marks: 1 ) - Please choose one
Which of the following statement is best regarding declaration of friend function?
       Friend function must be declared after public keyword.
       Friend function must be declared after private keyword.
       Friend function must be declared at the top within class definition.
       ► It can be declared anywhere in class as these are not affected by the public and private keywords.
Question No: 23      ( Marks: 1 ) - Please choose one
The operator function overloaded for an Assignment operator (=) must be
       Non-member function of class
       ► Member function of class
       Friend function of class
       ► None of the given options


Question No: 24      ( Marks: 1 ) - Please choose one
For non-member operator function, object on left side of the operator may be
       Object of operator class
       Object of different class
       ► Built-in data type
       All of the given options
Question No: 25      ( Marks: 1 ) - Please choose one
The operator function will be implemented as _____, if obj1 drive the - operator whereas obj2 is passed as arguments to - operator in the statement given below.
obj3   =   obj1 -   obj2;
       Member function
       Non-member function
       Friend function
       None of the given options
Question No: 26      ( Marks: 1 ) - Please choose one
Which one of the following is the declaration of overloaded pre-increment operator implemented as member function?
       Class-name operator +() ;
       Class-name operator +(int) ;
       Class-name operator ++() ;
       Class-name operator ++(int) ;
Question No: 27      ( Marks: 1 ) - Please choose one
The static data members of a class are initialized _______
       ► at file scope
       within class definition
       within member function
       within main function
Question No: 28      ( Marks: 1 ) - Please choose one
Class is a user defined___________.
       ► data type
       memory referee
       value
       none of the given options.
Question No: 29      ( Marks: 1 ) - Please choose one
We can also define a user-defines manipulators.
       True
       False
Question No: 30      ( Marks: 1 ) - Please choose one
Automatic variable are created on ________.
       Heap
       Free store
       static storage
       stack
Question No: 31      ( Marks: 1 )
How do we provide the default values of function parameters?

Answer: The default value of a parameter is provided inside the function prototype or function definition. For example, we could declare the default function arguments for a function while declaring or defining it.



Question No: 32      ( Marks: 1 )
Why do java consider pointer as dangerous
Answer:
The concept of pointers is very important but quite limited to C and C++. The modern languages, for example JAVA, describe pointers as dangerous. We can go anywhere in the memory and can change a value. There is another problem with pointers, which is that these could be pointing to nowhere.

Question No: 33      ( Marks: 2 )
What is memory leak?
Answer: size. When there is no memory on heap, the computer will stop running and there may be a system crash. This situation is called a memory leak.

Question No: 34      ( Marks: 2 )
What does optimization the of code means?
Answer:
Header file is a nice mechanism to put function prototypes and define constants (global constants) in a single file. That file can be included simply with a single line of code.

Question No: 35      ( Marks: 3 )
What is the difference between structure and class?
Answer:
In structures, some data variables are gathered, grouped and named as a single entity. Class and structure are very closely related. In classes, we group some data variables and functions. These functions normally manipulate these variables. Before going ahead, it is better to understand what a class is: “A class includes both data members as well as functions to manipulate that data”

Question No: 36      ( Marks: 3 )
See the following code segment.
template <class T>
class myclass {
private:
            T x;
public:
            myclass (T a) {
            x = a;
            }
};
Write the main function which creates two objects of class for int and double data types.
Question No: 37      ( Marks: 3 )
Is it possible to define two functions as given below? Justify your answer.
func(int x, int y)
func(int &x, int &y)
Solution:
No, it is impossible to define two functions as in the main function the way to call both functions is same. How does the compiler know that which functions is being called? There is no way for the compiler to find out. Therefore there is an ambiguity and that is not allowed. The only thing to realize is the side effect. Side effects are critical to take care of whenever you are doing call by reference.

Question No: 38      ( Marks: 5 )
Write a program using getline() member function to inputs a string up to delimiter character comma (,) and then display the string on the screen.
Question No: 39      ( Marks: 5 )

Do you think that friend functions violate encapsulation? Justify your answer.
Answer:
The friend functions of a class have access to the private data members of class. Despite being a good thing, there is possibility of vulnerability. We are opening our thoughts, inside view for somebody else. Without having 100% trust, it will be risky to make our thoughts and feelings public. We want that our private data is accessible to someone outside, not public for everybody. Otherwise, the data encapsulation and data-hiding concept will be violated. We keep the data members private and declare some specific functions that are not member of the class but friend of the class. As friends, they have access to the inside data structure of the class despite not being members.

Question No: 40      (Marks: 10 )


Write a simple program using the get() member function of cin object reading a text of 30 characters from the keyboard, store them in an array and then using put() member function of cout object to display them on the screen.

Question No: 41      (Marks: 10 )


Write a small program which defines two user-defined manipulators named octal and hexadecimal. These manipulators should display the decimal numbers into octal and hexadecimal.
In the main function, input a decimal number from the user and then display this decimal number into octal and hexadecimal using user-define manipulators named octal and hexadecimal

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