cs 201 most important 27 solved MCQ

CS201 ^3rd QUIZ

From   Lecture #  28 to 32

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Question No: 1      ( Marks: 1 ) - Please choose one

 Overloaded member operator function is always called by _______

       ► Class

       ► Object

       ► Compiler 

       ►Primitive data type

Question No: 2      ( Marks: 1 ) - Please choose one

 Loader loads the executable code from hard disk to main memory.

       ► True

       ► False

Question No: 3      ( Marks: 1 ) - Please choose one

Which of the following is the correct C++ syntax to allocate space dynamically for an array of 10 int?

       ► new int(10) ;

       ► new int[10] ;

       ► int new(10) ;

       ► int new[10];

Question No: 4      ( Marks: 1 ) - Please choose one

 The prototype of friend functions must be written ____ the class and its definition must be written ____

       ► inside, inside the class

       ► inside, outside the class

       ► outside, inside the class

       ► outside, outside the class

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Question No: 5      ( 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: 6      ( Marks: 1 ) - Please choose one

 To perform manipulation with input/output, we have to include _____ header file.

       ► iostream.h

       ► stdlib.h

       ► iomanip.h

       ► fstream.h

Question No: 7      ( Marks: 1 ) - Please choose one

The endl and flush are _______

       ► Functions

       ► Operators

       ► Manipulators

       ► Objects

Question No: 8      ( Marks: 1 ) - Please choose one

  If we want to use stream insertion and extraction operators with _______ then we have to overload these operators.

       ► int, float, double

       ► objects of class

       ► int, float, object

       ► int, char, float

Question No: 9      ( Marks: 1 ) - Please choose one

 The static data members of a class can be accessed by ________

       ► only class

       ► only objects

       ► both class and objects

       ► none of given options

Question No: 10      ( Marks: 1 ) - Please choose one

 Classes defined inside other classes are called ________ classes

       ► looped

       ► nested

       ► overloaded

       ► none of the given options.

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Question No: 11      ( Marks: 1 ) - Please choose one

 Which value is returned by the destructor of a class?

       ► A pointer to the class.

       ► An object of the class.

       ► A status code determining whether the class was destructed correctly

       ► Destructors do not return a value.

Question No: 12      ( Marks: 1 ) - Please choose one

Consider the following code segment

class M {

   friend int operator!(const M &);

...

}; 

!s                                 // code of line implies that     operator!(s)

...

Let assume if s is an object of the class then function is implemented as ___________

       ► Member function

       ► Non-member function

       ► Binary operator function

       ► None of the given options

Question No: 13      ( Marks: 1 ) - Please choose one

 If text is a pointer of class String then what is meant by the following statement?

text = new String [5];

       ► Creates an array of 5 string objects statically

       ► Creates an array of 5 string objects dynamically

       ► Creates an array of pointers to string

       ► Creates a string Object

Question No: 14      ( Marks: 1 ) - Please choose one

 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

Question No: 15      ( Marks: 1 ) - Please choose one

 In functions that return reference, use __________variables.

       ► Local

       ► Global

       ► Global or static

       ► None of the given option

Question No: 16      ( 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: 17      ( 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: 18      ( 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: 19      ( Marks: 1 ) - Please choose one

 new and delete operators cannot be overloaded as member functions.

       ► True

       ► False

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Question No: 20      ( Marks: 1 ) - Please choose one

 The operator function of <<  and >> operators are always the member function of a class.

       ► True

       ► False

Question No: 21      ( 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: 22      ( Marks: 1 ) - Please choose one

 new and delete are _____ whereas malloc and free are _____.

       ► Functions, operators

       ► Classes, operators

       ► Operators, functions

       ► Operators, classes

Question No: 23      ( 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: 24      ( 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: 25      ( 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: 26      ( Marks: 1 ) - Please choose one

 Class is a user defined___________.

       ► data type

       ► memory referee

       ► value

       ► none of the given options.

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

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