C++ FAQ

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1. The relational operator in C++ "!=" means Ans: not equal to 2. A feature that allows one interface to be used for a general class of actions, is called Ans : Polymorphism 3. The process by which one object can acquires the properties of another objects, is called Ans : Inheritance 4. The mechanism that binds together code & data it manipulates, keeps both safe from outside interference & misuse, is called Ans : Encapsulation 5. How many parameters can be passed to a function Ans : as many parameters as are defined in the function definition 6. The statements that provide a means of immediately terminating the execution of the loop, is Ans : break 7. What is the minimum number of times the body of for loop is executed Ans : zero 8. The symbol "+=" is used to denote Ans : addition assignment 9. The operator which returns the remainder of the division operation, is that Ans : % 10. The variables or methods that can be accessed only by subclasses and not by any other class,are called Ans : protected 11. The two operations x+=1 & y=x can be simultaneously written as Ans. y=++x 12. In the above question the operation is called Ans : prefix 13. "?" operator is called Ans : ternary 14. If the body of the while loop is empty, then the statement is called Ans : null statement 15. The statement that causes program control to transfer back to the caller of the method,can be said as Ans : return 16. A class is a ______ for an object Ans : template 17. To dynamically allocate memory we use Ans : new 18. To refer to the current object, we use the keyword Ans : this 19. For overloaded function, the compiler chooses the right specific version on the basis of the parameter,is Ans : type,order or number 20. A member that can be accessed before any objects of its class created is called Ans : static member 21. A function that has access to all private and protected members of the class for which it is a friend, is called Ans : friend function 22. The restrictions that are applied to friend function are Ans : (i)A derived class does not inherit friend function (ii)friend functions may not have a storage-class specifiers 23. In C++,you can create short functions that are not actually called;rather their code is expanded in line at the point of each invocation, are called Ans : inline function 24. To initialize an object, we use Ans : ob(i) ob=i . OB=Object i=value. 25. To access member of a class given a pointer to an object, we use Ans : -> 26. A base pointer can be used to point Ans : a derived object or a base class object 27. To allocate memory dynamically Ans : new 28. The prototype for the function that overload new operator is like that Ans : void operator new (size_t size) 29. The sceleton for a function that overload delete operators is like that Ans : void operator delete(void p) 30. The default base-class access specifiers is Ans : private 31. A member function that is declared within a base class & redefined by a derived class is called Ans : virtual function 32. C++ determines which version of virtual function to call based upon the type of object pointed to by the pointer Ans : at run time 33. The redefinition of a virtual function by a derived class is called Ans : overriding 34. A virtual function that has no definition within a base class is called Ans: a pure virtual function 35. A class that contains at least one pure virtual function, is said to be Ans : abstract 36. Events that occur at compile time is called Ans : Early binding/static binding 37. Function calls that are not resolved until runtime, is called Ans : late binding/Dynamic binding 38. A generic function that defines a general set of operations that will be applied to various types of data, is created using the keyword Ans : template 39. Code that you want to monitor for exceptions must have been executed from within a Ans : try block 40. The exception is caught & processed using Ans : catch 41. Throwing an unhandled exception causes the standard library _________ to be invoked Ans : terminate() 42. Attempting to throw an exception that is not supported by a function will cause standard library function _______ to be called Ans : unexpected 43. When you rethrow an exception, it will be recaught by the Ans : next catch statement 44. A class that contains many member function and variables that control or monitor the functional operation of a stream, is Ans : ios 45. To directly set the various format flags related to a stream, we use the manipulator Ans : setiosflags 46. To insert characters into a stream, we use the output operator Ans : << 47. To read & discard characters from the input stream, we use the member function Ans : ignore() 48. In RTTI, to obtain an object's type, we use Ans : typeid 49. The function that can not modify the object that invokes it, is said to be Ans : const member function 50. To access the dynamically allocated array, you must use a second function, called str(),which has the prototype: Ans : char *str();