VU World || Assignments, Quizzes, GDBs, Past Papers, Reports etc....

 To access the data members of structure _______ is used.

       ► * operator

       ► à operator

       ► None of given.

 What does 5 ^ 6 , evaluate to in decimal where ‘^’ is Exclusive OR operator?

       ► 1

       ► 2

       ► 3

       ► 4

   

 If constructor contains a return statement in its body then compiler will give __________

       ► No error

       ► Syntax error

       ► Logical error

       ► Run time error

   

  We can use New keyword inside of Class Constructor.

 ►       True

   

 When an operator function is define as member function for a Unary operator then the number of argument it take is/are,

 ►       Zero

 ►       One

 ►       Two

 ►       N arguments

   

 The declarator of Plus (+) member operator function is

 ►       operator Class-Name + ( )

 ►       operator Class-Name + ( rhs)

 ►       Class-Name operator + ( )

   

 Friend function of a class is ______________ .

 ►       Member function

 ►       Non-member function

 ►       Private function

 ►       Public function

   

 We can also create an array of user define data type.

 ►       True

   

 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

   

 Deleting an array of objects without specifying [] brackets may lead to memory leak

 ►       True

   

   

 Array is passed by value to a function by default.

►       False

   

 With template function, the compiler automatically detects the passed data and generates a new copy of function using passed data.

►       False

   

 What will be the correct syntax to initialize all elements of two-dimensional array to value 0?

►        int arr[2][3] = {0,0} ;

 ►       int arr[2][3] = {{0},{0}} ;

 ►       int arr[2][3] = {0},{0} ;

 ►       int arr[2][3] = {0} ;

   

 When an operator function is define as member function then operand on the left side of operator must be an object.

►       False

 break statement can be used outside a loop or switch statement.

►       False

   

 The keyword_______ is used to return some value from a function.

 ►       return

 ►       break

 ►       continue

 ►       goto

   

 Every data member or function inside the structure is ___ by default whereas everything declared inside a class is ____ by default.

 ►       private, public

 ►       private, protected

 ►       public, protected

   

 Which of the following is true for the C++ statement given below?

 ►       It creates a synonym for variable ‘val’

 ►       It creates an alias for variable ‘val’

 ►       It’s a new name for variable ‘val’

   

 If overloaded plus operator is implemented as non-member function then which of the following statement will be true for the statement given below?

 ►       obj2 will be passed as an argument to + operator whereas obj2 will drive the + operator

 ►       obj1 will drive the + operator whereas obj2 will be passed as an argument to + operator

►        Both objects (obj1, obj2) will be passed as arguments to the + operator

 ►       Any of the objects (obj1, obj2) can drive the + operator

   

 Unary operator implemented as member function takes ____ arguments whereas non-member function takes _____ arguments.

 ►       One, zero

 ►       One, two

 ►       Two, one

   

 The input/output streams cin and cout are ________ therefore have _______.

       ► Structures, function

       ► Objects, member functions

       ► Functions, objects

       ► None of the given options

 If a symbolic constant has been defined, it will be an error to define it again.

       ► False

   

 Every class contains _______________.

       ► Destructor

       ► Both a constructor and a destructor

       ► None of the given options

   

 new and delete keywords are _____________ in C++ language.

       ► Built-in- Function

       ► Operators

       ► Memory Allocation Function

       ► None of the given options

   

 Consider the following code segment.

class M {

public:

   M &operator+(const M &);

...

};

...

Let assume if p and q are class objects then function is implemented as _______

 ►       Member function

 ►       Non-member function

 ►       Friend function

 ►       None of the given options

   

 Assignment operator is -------------------------associative.

 ►       right

 ►       left

 ►       unary

   

 Static variable which is defined in a function is initialized __________.

       ► Only once during its life time

       ► Every time the function call

       ► Compile time of the program

       ► None of the above

   

 Wecan not define a variable of user-defined data type in the class.

 ►       True

   

 A constructor that will create a new object with a full copy of the other object, is copy is known as ___________

►        deep copy

 ►       shallow copy

 ►       constructor copy

 ►       none of the options

   

A reference data type is a variable that can contain an address. The reference data types in Java are arrays, classes and interfaces. You'll hear often say that Java does not have pointers. Yet, you could consider a reference data type to be a pointer

   

The difference is in the number of arguments used by the function. In the case of binary operator overloading, when the function is a member function then the number of arguments used by the operator member function is one (see below example). When the function defined for the binary operator overloading is a friend function, then it uses two arguments.

   

 What is the this pointer? Give an example of its use

In a C++ program, if you create object A of class X, you can then obtain the address of A by using the "this" pointer. The address is available as a local variable in the non-static member functions of X, and its type is const X*. The "this" pointer works because C++ creates instances of its data members, and it keeps one copy of each member function.

   

 What are manipulators? Give one example.

Manipulators are operators used in C++ for formatting output. The data is manipulated by the programmer’s choice of displayed endl manipulator. This manipulator has the same functionality as the ‘\n’ newline character.

   

 What will be the output of following functions if we call these functions three times?

void func1(){

int x = 0;

x++;

cout << x << endl;

}

void func2(){

static int x = 0 ;

x++;

cout << x << endl ;

} 

   

 If the requested memory is not available in the system then what does calloc/malloc and new operator return?

malloc returns a void pointer to the allocated space or NULL if there is insufficient memory available. To return a pointer to a type other than void, use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any type of object. If size is 0, malloc allocates a zero-length item in the heap and returns a valid pointer to that item.

By default, malloc does not call the new handler routine on failure to allocate memory. You can override this default behavior so that, when malloc fails to allocate memory, malloc calls the new handler routine in the same way that the new operator does when it fails for the same reason.

   

 If we want to send the data by reference and don’t want that original data should be affected then what can we do to prevent any change?

   

 Write down the disadvantages of the templates.

The disadvantages of templates are:

• 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.

   

 The following code segment has errors. Locate as many as you can and explain briefly.

class Circle // no need to enter colon here , so I removed it

{

private : //colon missing

double centerX;

double centerY;

double radius;

public: //colon missing

void setCenter(double, double);

void setRadius(int);

   

 Write a program which consists of two classes, Date and Person.

Date class should contain three data members day, month, year and setter and getter function for these data members. Date class should also contain showdate()member function to display date.

Person class should contain three data members Name, Address, and Bday, where Name and Address are char pointer while Bday(Date of birth) is of type Date, Person class should further contain two member functions Display() and setdate().

In main program Create an object of Class person and call the member functions with it.

   

 Write a C++ program that contains a class ‘myClass’ having two data members of type int.

The class must have

·     A default constructor which must initialize all the data members to their meaningful values.

·     A destructor with no implementation.

·     Setter member functions to set all data members of class

·     Getter member functions to get all data members of class

In main function of the program

                                                                                                            

5.      Prompt the user to enter the number of objects to be created.

6.      Dynamically allocate memory to objects according to the size entered by user.

7.      De-allocate memory that was allocated to objects

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