Object Oriented Programming Solved MCQs - Part 2

It is possible to declare as a friend A member function A global function A class All of the above       _____________________...

It is possible to declare as a friend A member function A global function A class All of the above       _____________________________________________________________________________________

What will be the result of the expression 13 & 25? 38 25 9 12       _____________________________________________________________________________________

A function call mechanism that passes arguments to a function by passing a copy of the values of the arguments is __________ Call by name Call by value Call by reference Call by value result       _____________________________________________________________________________________

The members of a class, by default, are Public Protected Private Mandatory to specify       _____________________________________________________________________________________

Which of the following is a string literal constant? “Visual C++” “137.45” “A” All of the above       _____________________________________________________________________________________

Which of the following statements is NOT valid about operator overloading?  Only existing operators can be overloaded Overloaded operator must have at least one operand of its class type The overloaded operators follow the syntax rules of the original operator None of the above       _____________________________________________________________________________________

What is the output of the following code char symbol[3]={‘a’,‘b’,‘c’}; for (int index=0; index<3; index++) cout << symbol [index]; a b c “abc” abc ‘abc’       _____________________________________________________________________________________

Which of the statements is true in a protected derivation of a derived class from a base class? Private members of the base class become protected members of the derived class Protected members of the base class become public members of the derived class Public members of the base class become protected members of the derived class Protected derivation does not affect private and protected members of the derived class       _____________________________________________________________________________________

In which case is it mandatory to provide a destructor in a class?  Almost in every class Class for which two or more than two objects will be created Class for which copy constructor is defined Class whose objects will be created dynamically       _____________________________________________________________________________________

The concept of hierarchical classification is related to Abstraction Inheritance Function overloading None       _____________________________________________________________________________________

Assume that we have constructor function for both Base and Derived classes. Now consider the declaration : main ( ) Base *p = new Derived; In what sequence, the constructor will be executed ? Derived class constructor is followed by Base class constructor. Base class constructor is followed by Derived class constructor. Base class constructor is never called. Derived class constructor is never called.       _____________________________________________________________________________________

If you wanted to sort many large objects or structures, it would be most efficient to  Place them in an array and sort the array. Place pointers to them in an array and sort the array. Place them in a linked list and sort the linked list. Place references to them in an array and sort the array.       _____________________________________________________________________________________

cfront is the front end of a C compiler is the per-process of a C compiler is a tool that is translated a C++ code to its equivalent C code None of above       _____________________________________________________________________________________

Usually a pure virtual function  Has complete function body Will never be called Will be called only to delete an object Is defined only in derived class       _____________________________________________________________________________________

A static data member is given a value Within the class definition Outside the class definition When the program is exeuted Never       _____________________________________________________________________________________

C++ was originally developed by Clocksin and Melish Donald E.Knuth Sir Richard Hadlee Bjarne Stroustrup       _____________________________________________________________________________________

What is the error in the following code? class t { virtual void print(); } No error Function print() should be declared as static. Function print() should be defined. Class t should contain data members.       _____________________________________________________________________________________

If a class C is derived from class B, which is derived from class A, all through public inheritance, then a class C member function can access Protected and public data only in C and B Protected and public data only in C Private data in A and B Protected data in A and B       _____________________________________________________________________________________

A friend function has access to all private and protected members of the class for which it is a friend  Only private Private and protected Only protected None of the above       _____________________________________________________________________________________

Which of the following cannot be legitimately passed to a function  A constant A variable A structure A header file       _____________________________________________________________________________________

Match the following : (a) Garbage collection in     1. Java (b) Nameless object             2. generic programming (c) Template support            3. defines a class (d) A forward reference       4. member function (e) Derived class inherits from base class  1   5   4   2   3 1   5   2   3   4 5   1   2   3   4 5   4   3   1   2       _____________________________________________________________________________________

The polymorphism can be characterized by the phrase One interface,multiple methods Multiple interfaces,one method One interface,one method None of the above       _____________________________________________________________________________________

A class defined within another class is  Nested class Inheritance Containership Encapsulation       _____________________________________________________________________________________

In multiple inheritance  The base classes must have only default constructors Cannot have virtual functions Cannot have virtual classes None of the above       _____________________________________________________________________________________

Which of the statements are true ? I. Function overloading is done at compile time. II. Protected members are accessible to the member of derived class. III. A derived class inherits constructors and destructors. IV. A friend function can be called like a normal function. V. Nested class is a derived class. I, II, III II, III, V III, IV, V I, II, IV       _____________________________________________________________________________________

In C++, dynamic memory allocation is accomplished with the operator ____ new this malloc( ) delete       _____________________________________________________________________________________

Use of virtual functions implies Overloading Overriding Static binding Dynamic binding       _____________________________________________________________________________________

Which of the following type casts will convert an Integer variable named amount to a Double type? (double) amount (int to double) amount int to double(amount) int (amount) to double       _____________________________________________________________________________________

The members of a class by default are  Public Protected Private Mandatory to specify       _____________________________________________________________________________________

What will be the output of following program? #include<iostream.h> void main() { float x; x=(float)9/2; cout<<x; } 4.5 4.0 4 5       _____________________________________________________________________________________

Which feature in OOP allows reusing code? Polymorphism Inheritance Encapsulation Data hiding       _____________________________________________________________________________________

Exception handling is targeted at Run-time error Compile time error Logical error All of the above       _____________________________________________________________________________________

Overloading a postfix increment operator by means of a member function takes  No argument One argument Two arguments Three arguments       _____________________________________________________________________________________

Which of the following, if any, are valid names for variables? class friend void None of the above is valid names for variables       _____________________________________________________________________________________

What does C++ append to the end of a string literal constant? a space a number sign (#) an asterisk (*) a null character       _____________________________________________________________________________________

A template class  Is designed to be stored in different containers Works with different data types Generates objects which must be identical Generates classes with different numbers of member functions       _____________________________________________________________________________________

A struct is the same as a class except that There are no member functions All members are public Cannot be used in inheritance hierarchy It does have a this pointer       _____________________________________________________________________________________

An array element is accessed using a first-in-first-out approach the dot operator a member name an index number       _____________________________________________________________________________________

Which of the following is not the characteristic of constructor?  They should be declared in the public section. They do not have return type. They can not be inherited. They can be virtual.       _____________________________________________________________________________________

An exception is caused by  A hardware problem A problem in the operating system A syntax error A run-time error       _____________________________________________________________________________________

To access the public function fbase() in the base class, a statement in a derived class function fder() uses the statement.fbase(); fbase(); fder(); base::fbase(); der::fder();       _____________________________________________________________________________________

RunTime Polymorphism is achieved by ______  Friend function Virtual function Operator overloading Function overloading       _____________________________________________________________________________________

Runtime polymorphism is achieved by Friend function Virtual function Operator overloading Function overloading       _____________________________________________________________________________________

Pure virtual functions  Have to be redefined in the inherited class Cannot have public access specification Are mandatory for a virtual class None of the above       _____________________________________________________________________________________

If x =5, y =2 then x ^y equals________. (where ^ is a bitwise XOR operator) 00000111 10000010 10100000 11001000       _____________________________________________________________________________________

Identify the operator that is NOT used with pointers -> & * >>       _____________________________________________________________________________________

A friend function to a class, C cannot access  Private data members and member functions Public data members and member functions Protected data members and member functions The data members of the derived class of C       _____________________________________________________________________________________

A variable defined within a block is visible  From the point of definition onward in the program From the point of definition onward in the function From the point of definition onward in the block Throughout the function       _____________________________________________________________________________________

The function whose prototype is void getData(Item *thing); receives a pointer to a structure a reference to a structure a copy of a structure nothing       _____________________________________________________________________________________

The keyword friend does not appear in  The class allowing access to another class The class desiring access to another class The private section of a class The public section of a class       _____________________________________________________________________________________