In which access should a constructor be defined, so that object of the class can be created in any function?
a) Any access specifier will work
b) Private
c) Public
d) Protected
Q.2.
Which among the following is correct for the class defined below?
class student
{
int marks;
public: student(){}
student(int x)
{
marks=x;
}
};
main()
{
student s1(100);
student s2();
student s3= return}
a) Program will give compile time error
b) Object s3, syntax error
c) Only object s1 and s2 will be created
d) Program runs and all objects are created
Q.3.
The copy constructors can be used to ________
a) Copy an object so that it can be passed to another primitive type variable
b) Copy an object for type casting
c) Copy an object so that it can be passed to a function
d) Copy an object so that it can be passed to a class
Q.4.
Which constructor will be called from the object obj2 in the following C++ program?
class A
{
int i;
A()
{
i=
}
A(int x)
{
i=x+
}
A(int y, int x)
{
i=x+y;
}
};
A obj1(10);
A obj2(10,20);
A obj3;
a) A(int y, int x)
b) A(int y; int x)
c) A(int y)
d) A(int x)
Q.5.
Which among the following represents correct constructor?
b) classname()
c) ()classname
d) ~classname()
a) –classname()
Q.6.
What happens when an object is passed by reference?
a) Destructor is called at end of function
b) Destructor is called when called explicitly
c) Destructor is not called
d) Destructor is called when function is out of scope
Q.7.
Which access specifier is usually used for data members of a class?
a) Protected
b) Private
c) Public
d) Default
Q.8.
How to access data members of a class?
a) Dot, arrow or direct call
b) Dot operator
c) Arrow operator
d) Dot or arrow as required
Q.9.
Which feature of OOP reduces the use of nested classes?
a) Inheritance
b) Binding
c) Abstraction
d) Encapsulation
Q.10.
Which keyword among the following can be used to declare an array of objects in java?
a) allocate
b) arr
c) new
d) create
Q.11.
Which operator can be used to free the memory allocated for an object in C++?
a) Unallocate
b) Free()
c) Collect
d) delete
Q.12.
Which type of members can’t be accessed in derived classes of a base class?
a) All can be accessed
b) Protected
c) Private
d) Public
Q.13.
Which among the following best describes the Inheritance?
a) Using the data and functions into derived segment
b) Using already defined functions in a programming language
c) Using the code already written once
d) Copying the code already written
Q.14.
Single level inheritance supports _____________ inheritance.
a) Language independency
b) Multiple inheritance
c) Compile time
d) Runtime
Q.15.
How to overcome diamond problem?
a) Using seperate derived class
b) Using virtual keyword with same name function
c) Can’t be done
d) Using alias name
Q.16.
Which keyword is used to declare virtual functions?
a) virt
b) virtually
c) virtual
d) anonymous
Q.17.
What happens if non static members are used in static member function?
a) Executes fine
b) Compile time error
c) Executes if that member function is not used
d) Runtime error
Q.18.
What is friend member functions in C++?
a) Non-member functions which have access to all the members (including private) of a class
b) Member function which doesn’t have access to private members
c) Member function which can modify any data of a class
d) Member function which can access all the members of a class
Q.19.
Where is the memory allocated for the objects?
a) Cache
b) ROM
c) HDD
d) RAM
Q.20.
Which of the following best describes member function overriding?
a) Member functions having the same name in derived class only
b) Member functions having the same name and different signature inside main function
c) Member functions having the same name in base and derived classes
d) Member functions having the same name in base class only
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