Question What does the following statement mean?
int (*fp)(char*)
A pointer to a pointer
B pointer to an array of chars
C pointer to function taking a char* argument and returns an int
D function taking a char* argument and returning a pointer to int
Answer C
Marks 1
Unit
Id 2
Question The operator used for dereferencing or indirection is ____
A *
B &
C ->
D –>>
Answer A
Marks 1
Unit III
Id 3
Question Choose the right option
string* x, y;
A x is a pointer to a string, y is a string
B y is a pointer to a string, x is a string
C both x and y are pointer to string types
D none of the mentioned
Answer A
Marks 1
Unit III
Id 4
Question Which one of the following is not a possible state for a pointer?
A hold the address of the specific object
B point one past the end of an object
C Zero
D point to a byte
Answer D
Marks 1
Unit III
Id 5
Question Which of the following is illegal?
A int *ip;
B string s, *sp = 0;
C int i; double* dp = &i;
D int *pi = 0;
Answer D
Marks 1
Unit III
Id 6
Question #include <iostream>
using namespace std;
int main()
{
int a = 5, b = 10, c = 15;
int *arr[ ] = {&a, &b, &c};
cout <<arr[1];
return 0;
}
A 10
B 15
C 20
D Random number
Answer D
Marks 2
Unit III
Id 7
Question The correct statement for a function that takes pointer to a float, a pointer to a pointer to a
char and returns a pointer to a pointer to a integer is
A int **fun(float**, char**)
B int *fun(float*, char*)
C int ***fun(float*, char**)
D int ***fun(*float, **char)
Answer C
Marks 1
Unit III
Id 8
Question #include <iostream>
using namespace std;
int main()
{
char arr[20];
int i;
for(i = 0; i < 10; i++)
*(arr + i) = 65 + i;
*(arr + i) = ‘ ’;
cout << arr;
return(0);
}
A ABCDEFGHIJ
B AAAAAAAAA
C JJJJJJJJJJJJ
D None
Answer A
Marks 2
Unit III
Id 9
Question #include <iostream>
using namespace std;
int main()
{
char *ptr;
char Str[] = “abcdefg”;
ptr = Str; ptr += 5;
cout << ptr;
return 0;
}
A fg
B cdef
C defg
D abcd
Answer A
Marks 2
Unit III
Id 10
Question Which rule will not affect the friend function?
A private and protected members of a class cannot be accessed from outside
B private and protected member can be accessed anywhere
C both a &b
D NoneAnswer A
Marks 1
Unit III
Id 11
Question Which keyword is used to declare the friend function?
A Firend
B friend
C Classfriend
D myfriendAnswer B
Marks 1
Unit III
Id12
Question #include <iostream>
using namespace std;
class Box
{
double width;
public:
friend void printWidth( Box box );
void setWidth( double wid );
};
void Box::setWidth( double wid ) {
width = wid;
}
void printWidth( Box box )
{
box.width = box.width * 2;
cout << “Width of box : ” << box.width << endl;
}
int main( )
{
Box box;
box.setWidth(10.0);
printWidth( box );
return 0;
}
A 40
B 5
C 10
D 20
Answer D
Marks 2
Unit III
Id 13
Question Pick out the correct statement.
A A friend function may be a member of another class.
B A friend function may not be a member of another class.
C A friend function may or may not be a member of another class.
D None of the mentioned
Answer C
Marks 1
Unit III
Id 14
Question Where does keyword „friend‟ should be placed?
A function declaration
B function definition
C main function
D None
Answer A
Marks 1
Unit 3
Id 15
Question #include <iostream>
using namespace std;
class sample
{
private:
int a, b;
public:
void test()
{
a = 100;
b = 200;
} friend int compute(sample e1);
};
int compute(sample e1)
{
return int(e1.a + e1.b) – 5;
}
int main()
{
sample e;
e.test();
cout << compute(e);
return 0;
}
A 100
B 200
C 300
D 295
Answer D
Marks 2
Unit 3
Id 16
Question #include <iostream>
using namespace std;
class base
{
int val1, val2;
public:
int get()
{
val1 = 100;
val2 = 300;
}
friend float mean(base ob);
};
float mean(base ob)
{
return float(ob.val1 + ob.val2) / 2;
}
int main()
{
base obj;
obj.get();
cout << mean(obj);
return 0;
}A 200
B 150
C 100
D 300
Answer
Marks 2
Unit 3
Id 17
Question To which does the function pointer point to?
A Variable
B Constants
C Function
D absolute variables
Answer C
Marks 1
Unit
Id 18
Question What we will not do with function pointers?
A allocation of memory
B de-allocation of memory
C both a &b
D None
Answer C
Marks 1
Unit
Id 19
Question #include <iostream>
using namespace std;
int add(int first, int second)
{
return first + second + 15;
}
int operation(int first, int second, int (*functocall)(int, int))
{
return (*functocall)(first, second);
}
int main()
{
int a;
int (*plus)(int, int) = add;
a = operation(15, 10, plus);
cout << a;
return 0;
}
A 25
B 36
C 40
D 45
Answer C
Marks 2Unit
Id 20
Question #include <iostream>
using namespace std;
void func(int x)
{
cout << x ;
}
int main()
{
void (*n)(int);
n = &func;
(*n)( 2 );
n( 2 );
return 0;
}
A 2
B 21
C 22
D 20
Answer C
Marks 2
Unit
21
Question #include <iostream>
using namespace std;
int n(char, int);
int (*p) (char, int) = n;
int main()
{
(*p)(‘d’, 9);
p(10, 9);
return 0;
}
int n(char c, int i)
{
cout << c << i;
return 0;
}
A d9
9
B d9d9
C d9
D Compile time error
Answer A
Marks 2
Unit
Id 22
Question #include <iostream>
using namespace std;
int func (int a, int b)
{
cout << a;
cout << b;
return 0;
}
int main(void)
{
int(*ptr)(char, int);
ptr = func;
func(2, 3);
ptr(2, 3);
return 0;
}
A 2323
B 232
C 23
D Compile time error
Answer D
Marks 2
Unit 3
Id 23
Question What are the mandatory part to present in function pointers?
A &
B return values
C Data types
D None
Answer C
Marks 1
Unit
Id 24
Question What is meaning of following declaration?
int(*ptr[5])();
A ptr is pointer to function.
B ptr is array of pointer to function.
C ptr is pointer to such function which return type is array.
D ptr is pointer to array of function.
Answer B
Marks 1
Unit
Id 25
Question What is size of generic pointer in c?
A 0
B 1
C 2
D Null
Answer C
Marks 1
Unit
Id 26
Question Void pointer can point to which type of objects?
A Int
B Float
C Double
D All
Answer D
Marks 1
Unit
Id 27
Question What does the following statement mean?
int (*fp)(char*)
A pointer to a pointer
B pointer to an array of chars
C pointer to function taking a char* argument and returns an int
D function taking a char* argument and returning a pointer to int
Answer C
Marks 1
Unit
Id 28
Question What is size of generic pointer in C++ (in 32-bit platform) ?
A 2
B 4
C 8
D 0
Answer B
Marks 1
Unit
Id 29
Question #include <iostream>
using namespace std;
int main()
{
int a[2][4] = {3, 6, 9, 12, 15, 18, 21, 24};
cout << *(a[1] + 2) << *(*(a + 1) + 2) << 2[1[a]];
return 0;
}
A 15 18 21
B 21 21 21
C 24 24 24
D Compile time error
Answer B
Marks 2
Unit
Id 30
Question #include <iostream>
using namespace std;
int main()
{
int i;
char *arr[] = {“C”, “C++”, “Java”, “VBA”};
char *(*ptr)[4] = &arr;
cout << ++(*ptr)[2];
return 0;
}
A ava
B java
C c++
D Compile time error
Answer A
Marks 2
Unit
Id 31
Question #include <iostream>
using namespace std;
int main()
{
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << *p;
return 0;
}
A 4
B 5
C 6
D 7
Answer B
Marks 2
UnitId 32
Question #include <iostream>
using namespace std;
int main()
{
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << arr;
return 0;
}
A 4
B 5
C Address of arr
D 7
Answer C
Marks 2
Unit
Id 33
Question #include <iostream>
using namespace std;
int main ()
{
int numbers[5];
int * p;
p = numbers; *p = 10;
p++; *p = 20;
p = &numbers[2]; *p = 30;
p = numbers + 3; *p = 40;
p = numbers; *(p + 4) = 50;
for (int n = 0; n < 5; n++)
cout << numbers[n] << “,”;
return 0;
}
A 10,20,30,40,50,
B 1020304050
C Compile time error
D Runtime error
Answer A
Marks 2
Unit
Id 34
Question #include <iostream>
using namespace std;
int main()
{
int arr[] = {4, 5, 6, 7};
int *p = (arr + 1);
cout << *arr + 9;
return 0;
}
A 12
B 5
C 13
D Error
Answer C
Marks 2
Unit
Id 35
Question A void pointer cannot point to which of these?
A methods in c++
B class member in c++
C all of the mentioned
D None
Answer D
Marks 1
Unit
Id 36
Question #include <iostream>
using namespace std;
int func(void *Ptr);
int main()
{
char *Str = “abcdefghij”;
func(Str);
return 0;
}
int func(void *Ptr)
{
cout << Ptr;
return 0;
}
A abcdefghij
B address of string “abcdefghij”
C Compile time
D Run time error
Answer B
Marks 2
Unit
Id 37
Question #include <iostream>
using namespace std;
int main()
{
int *p;
void *vp;
if (vp == p);
cout << “equal”;
return 0;
}
A Equal
B No output
C Compile time error
D Run time error
Answer A
Marks 2
Unit III
Id 38
Question #include <iostream>
using namespace std;
int main()
{
int n = 5;
void *p = &n;
int *pi = static_cast<int*>(p);
cout << *pi << endl;
return 0;
}
A 5
B 6
C Compile time error
D Run time error
Answer A
Marks 2
Unit
Id 39
Question #include <iostream>
using namespace std;
int main()
{
int a = 5, c;
void *p = &a;
double b = 3.14;
p = &b;
c = a + b;
cout << c << ‘n’ << p;
return 0;
}
A 8, memory address
B 8.14
C memory address
D None
Answer A
Marks 2
Unit
Id 40
Question What we can‟t do on a void pointer?A pointer arithemetic
B pointer functions
C Both
D None
Answer A
Marks 2
Unit
Id 41
Question Which value we cannot assign to reference?A Integer
B Floating
C Unsigned
D Null
Answer D
Marks 1
Unit
Id 42
Question #include <iostream>
using namespace std;
int main()
{
int a = 9;
int & aref = a;
a++;
cout << “The value of a is ” << aref;
return 0;
}
A 9
B 10
C 11
D Error
Answer B
Marks 2
Unit
Id 43
Question #include <iostream>
using namespace std;
void print (char * a)
{
cout << a << endl;
}
int main ()
{
const char * a = “Hello world”;
print(const_cast<char *> (a) );
return 0;
}
A Hello world
B Hello
C World
D Compile time error
Answer A
Marks 2
Unit
Id 44
Question Identify the correct sentence regarding inequality between reference and pointer.
A we can not create the array of reference.
B we can create the Array of reference.
C we can use reference to reference.
D None
Answer AMarks 1
Unit
Id 45
Question Which is used to tell the computer that where a pointer is pointing to?
A Dereference
B Reference
C heap operations
D NoneAnswer A
Marks 1
Unit
Id 46
Question #include <iostream>
using namespace std;
int main()
{ int x;
int *p;
x = 5;
p = &x;
cout << *p;
return 0;
}
A 5
B 10
C Memory address
D None
Answer A
Marks 2
Unit
Id 47
Question #include <iostream>
using namespace std;
int main() {
int x = 9;
int* p = &x;
cout << sizeof(p);
return 0;
}
A 4
B 2
C Depends on compiler
D None
Answer C
Marks 2
Unit
Id 48
Question #include <iostream>
using namespace std;
int main()
{
double arr[] = {5.0, 6.0, 7.0, 8.0};
double *p = (arr+2);
cout << *p << endl;
cout << arr << endl;
cout << *(arr+3) << endl; cout << *(arr) << endl;
cout << *arr+9 << endl;
return 0;
}
A 7
0xbf99fc98
8
5
14
B 7
8
0xbf99fc98
5
14
C 0xbf99fc98
D None
Answer A
Marks 2
Unit
Id 49
Question What does the dereference operator will return?
A rvalue equivalent to the value at the pointer address.
B lvalue equivalent to the value at the pointer address.
C it will return nothing
D None
Answer B
Marks 2Unit
Id 50
Question Which operator is used in pointer to member function?
A .*
B ->*
C Both a &b
D None
Answer CMarks 2
Unit
Id 51
Question #include <iostream>
using namespace std;
class Foo
{
public:
Foo(int i = 0){ _i = i;}
void f() {
cout << “Executed”<<endl;
}
private:
int _i;
};
int main()
{
Foo *p = 0;
p -> f();
}
A Executed
B Error
C Run time error
D None
Answer A
Marks 2
Unit
Id 52
Question Which is the best design choice for using pointer to member function?
A Interface
B Class
C Structure
D None
Answer A
Marks 2
Unit
Id 53
Question Virtual functions allow you to
A create an array of type pointer-to-base class that can hold pointers to derived classes.
B create functions that can never be accessed.
C group objects of different classes so they can all be accessed by the same function code.
D use the same function call to execute member functions of objects from different classes.
Answer D
Marks 1
Unit III
Id 54
Question A pointer to a base class can point to objects of a derived class.
A TRUE
B FALSE
C
D
Answer A
Marks 1
Unit III
Id 55
Question A pure virtual function is a virtual function that
A causes its class to be abstract.
B returns nothing.
C is used in a base class.
D A and C
Answer D
Marks 1
Unit III
Id 56
Question An abstract class is useful when
A no classes should be derived from it.
B there are multiple paths from one derived class to another.
C no objects should be instantiated from it.
D you want to defer the declaration of the class.
Answer C
Marks 1
Unit III
Id 57
Question A friendfunction can access a class‟s private data without being a member of the class.
A TRUE
B FALSE
C
D
Answer A
Marks 1
Unit III
Id 58
Question A friend function can be used to
A mediate arguments between classes.
B increase the versatility of an overloaded operator.
C allow access to an unrelated class.
D B and C
Answer D
Marks 1
Unit III
Id 59
Question The keyword friend appears in
A the class allowing access to another class.
B the private section of a class.
C the public section of a class.
D All of the above
Answer D
Marks 1
Unit III
Id 60
Question A static function
A should be called when an object is destroyed.
B is closely connected to an individual object of a class.
C can be called using the class name and function name.
D is used when a dummy object must be created.
Answer C
Marks 1
Unit III
Id 61
Question An assignment operator might be overloaded to
A help keep track of the number of identical objects.
B assign a separate ID number to each object.
C signal when assignment takes place.
D All of the above
Answer D
Marks 1
Unit III
Id 62
Question The user must always define the operation of the copy constructor.
A TRUE
B FALSE
C
D
Answer B
Marks 1
Unit III
Id 63
Question The operation of the assignment operator and that of the copy constructor are
A similar, except that the copy constructor creates a new object.
B different, except that they both copy member data.
C different, except that they both create a new object.
D A and B
Answer D
Marks 1
Unit III
Id 64
Question A copy constructor could be defined to copy only part of an object‟s data.
A TRUE
B FALSE
C
D
Answer A
Marks 1
Unit III
Id 65
Question The lifetime of a variable that is
A local to a member function coincides with the lifetime of the function.
B global coincides with the lifetime of a class.
C nonstatic member data of an object coincides with the lifetime of the object.
D A and C
Answer D
Marks 1
Unit III
Id 66
Question There is no problem with returning the value of a variable defined as local within a
member function so long as it is returned by value.
A TRUE
B FALSE
C
D
Answer A
Marks 1
Unit III
Id 67
Question A copy constructor is invoked when
A a function returns by value.
B an argument is passed by value.
C A and B
D an argument is passed by reference.
Answer C
Marks 2
Unit III
Id 68
Question What does the thispointer point to?
A Data member of the class
B the object of which the function using it is a member
C Member function
D Base class
Answer B
Marks 1
Unit III
Id 69
Question A pointer is
A the address of a variable.
B an indication of the variable to be accessed next.
C a variable for storing addresses.
D the data type of an address variable.
Answer C
Marks 1
Unit III
Id 70
Question The expression *testcan be said to
A refer to the contents of test.
B dereference test.
C refer to the value of the variable pointed to by test.
D All of the above
Answer D
Marks 2
Unit III
Id 71
Question A pointer to void can hold pointers to __________
A int
B float
C char
D Any data type
Answer D
Marks 1
Unit III
Id 72
Question The type of variable a pointer points to must be part of the pointer‟s definition so that
A data types don‟t get mixed up when arithmetic is performed on them.
B pointers can be added to one another to access structure members.
C the compiler can perform arithmetic correctly to access array elements.
D A and C
Answer D
Marks 2
Unit III
Id 73
Question The first element in a string is
A the name of the string.
B the first character in the string.
C the length of the string.
D the name of the array holding the string.
Answer b
Marks 1
Unit III
Id 74
Question The newoperator
A returns a pointer to a variable.
B creates a variable called new.
C obtains memory for a new variable.
D A and C
Answer D
Marks 2
Unit III
Id 75
Question Definition for an array arrof 8 pointers that point to variables of type floatis
A *float arr[8]
B float* arr[8];
C float pointer[8]
D int *ary[8]
Answer B
Marks 1
Unit III
Id 76
Question The delete operator returns ____________ to the operating system.
A Memory that is no longer needed
B Pointer
C Object
D Class
Answer A
Marks 1
Unit III
Id 77
Question In a linked list
A each link contains a pointer to the next link.
B each link contains data or a pointer to data.
C the links are stored in an array.
D A and B
Answer D
Marks 2
Unit III
Id 78
Question If you wanted to sort many large objects or structures, it would be most efficient to
A place them in an array and sort the array.
B place pointers to them in an array and sort the array.
C place them in a linked list and sort the linked list.
D place references to them in an array and sort the array.
Answer B
Marks 1
Id 79
Question The contents of two pointers that point to adjacent variables of type floatdiffer by _____
A 1 byte
B 2 bytes
C 3 bytes
D 4 bytes
Answer D
Marks 1
Unit IIIId 80
Question Which of the following is true about virtual functions in C++.
A Virtual functions are functions that can be overridden in derived class with the same
signature.
B Virtual functions enable run-time polymorphism in a inheritance hierarchy.
C If a function is ‘virtual’in the base class, the most-derived class’s implementation of the
function is called according to the actual type of the object referred to, regardless of the
declared type of the pointer or reference. In non-virtual functions, the functions are called
according to the type of reference or pointer
D All of the above
Answer D
Marks 1
Unit III
Id 81
Question Predict the output of following C++ program.
#include<iostream>
using namespace std;
class Base {
public:
Base() { cout<<“Constructor: Base”<<endl; }
virtual ~Base() { cout<<“Destructor : Base”<<endl; }
};
class Derived: public Base {
public:
Derived() { cout<<“Constructor: Derived”<<endl; }
~Derived() { cout<<“Destructor : Derived”<<endl; }
};
int main() {
Base *Var = new Derived();
delete Var;
return 0;
}
A Constructor: Base
Constructor: Derived
Destructor : Derived
Destructor : Base
B Constructor: Base
Constructor: Derived
Destructor : Base
C Constructor: Base
Constructor: Derived
Destructor : Derived
D Constructor: Derived
Destructor : Derived
Answer A
Marks 2
Unit III
Id 82
Question Predict the output of following C++ program. Assume that there is no alignment and a
typical implementation of virtual functions is done by the compiler.
#include <iostream>
using namespace std;
class A
{
public:
virtual void fun();
};
class B
{
public:
void fun();
};
int main()
{
int a = sizeof(A), b = sizeof(B);
if (a == b) cout <<“a == b”;
else if (a >b) cout <<“a >b”;
else cout <<“a <b”;
return 0;
}
A a>b
B a==b
C a<b
D Compiler error
Answer A
Marks 2
Unit III
Id 83
Question Which of the following is FALSE about references in C++
A A reference must be initialized when declared
B Once a reference is created, it cannot be later made to reference another object; it cannot
be reset
C References cannot be NULL
D References cannot refer to constant value
Answer D
Marks 1
Unit IIIId 84
Question #include <iostream>
using namespace std;
class A
{
public:
virtual void fun() { cout <<“A::fun() “; }
};
class B: public A
{
public:
void fun() { cout <<“B::fun() “; }
};
class C: public B
{
public:
void fun() { cout <<“C::fun() “; }
};
int main()
{
B *bp = new C;
bp->fun();
return 0;
}
Which function will be called by statements bp->fun();?
A A::fun()
B B::fun()
C C::fun()
D Compiler error
Answer C
Marks 2
Unit III
Id 85
Question Which of the followings is/are automatically added to every class, if we do not write our
own.
A Copy Constructor
B Assignment Operator
C A constructor without any parameter
D All of the above
Answer D
Marks 2
Unit IIId 85
Question What is the output of following program?
#include<iostream>
using namespace std;
class Point {
Point() { cout <<“Constructor called”; }
};
int main()
{
Point t1;
return 0;
}
A Compiler Error
B Runtime Error
C Constructor called
D Segmentation Fault
Answer A
Marks 1
Unit III
Id 86
Question What will be the output of following program?
#include <iostream>
using namespace std;
class Test
{
public:
Test() { cout <<“Hello from Test() “; }
} a;
int main()
{
cout <<“Main Started “;
return 0;
}
A Main Started
B Main Started Hello from Test()
C Hello from Test() Main Started
D Compiler Error: Global objects are not allowed
Answer C
Marks 2
Unit II
Id 87
Question Which rule will not affect the friend function
A private &protected members of a class cannot be accessed from outside
B private &protected member can be accessed anywhere
C both a &b
D none of these
Answer A
Marks 1
Unit III
Id 88
Question which keyword is used to declare the friend function
A Friend
B Class Friend
C My friend
D all above
Answer A
Marks 1
Unit III
Id 89
Question what is syntax of friend function?
A Friend class1 Class2;
B Friend class;
C Friend class
D none of these
Answer D
Marks 1
Unit III
Id 90
Question what is output of the program?
#include<iostream>
using namespace std;
class Box
{
double width;public:
friend void printWidth(Box box);
void setWidth(double wid);
};
void Box::setWidth(double wid)
{
width-=wid;
}
void printWidth(Box box)
{
box.width=box.width*2;
cout<<“Width of box :”<<box.width<<endl;
}
int main()
{
Box box;
box.setWidth(10.0);
printWidth(box);
return 0;
}
A 40
B 5
C 10
D 20
Answer D
Marks 1
Unit III
Id 91
Question pick out the correct statement.
A A friend function may be member of another class
B A friend function may not be member of another class
C A friend function may or may not be member of another class
D none of theseAnswer C
Marks 1
Unit III
Id 92
Question Where does keyword ‘friend’ should be placed?
A Function declaration
B Function definition
C Main function
D none of these
Answer A
Marks 1Unit III
Id 94
Question Which of the following type of class allows only one object of it to be created?
A Virtual class
B Abstract class
C Singleton class
D Friend class
Answer C
Marks 1
Unit 3
Id 95
Question Which of the following is not type of constructor?
A Copy constructor
B Friend constructor
C Default constructor
D Parameterized constructor
Answer B
Marks 1
Unit III
Id 96
Question Which of the following statement is correct?
A Base class pointer cannot point to derived class
B Derived class pointer cannot point to base class
C Pointer to derived class cannot be created
D Pointer to base class cannot be created
Answer B
Marks 1
Unit III
Id 97
Question Which of the following is not the member of class?
A Static function
B Friend function
C Const function
D Virtual function
Answer B
Marks 1
Unit III
Id 98
Question Which of the following is not member of class?
A Data hiding
B Dynamic Typing
C Dynamic binding
D Dynamic loading
Answer C
Marks 1
Unit III
Id 99
Question The operator used for dereferencing or indirection is______________
A *
B &
C ->
D ->>
Answer D
Marks 1
Unit III
Id 100
Question Choose the right option
string* x, y
A x is pointer to string, y is a string
B y is pointer to string , x is a string
C both x &y are pointer to string types
D none of these
Answer A
Marks 1
Unit III
Id 101
Question Which one of the following is not a possible state for a pointer?
A hold the address of specific object
B point one past the end of an object
C Zero
D point to tye
Answer D
Marks 1
Unit 3
Id 102
Question Which of the following is illegal?
A int *ip;
B string s, *sp=0;
C int i;double *dp=&i;
D int *pi=0;
Answer C
Marks 1
Unit 3Id 103
Question what will happen in the code?
int a=100,b=200;
int *p=&a, *q=&b;
p=q;
A b is assigned to a
B p now points to b
C a is assigned to b
D q now points to a
Answer B
Marks 1
Unit III
Id 104
Question what is output of this program?
#include<iostream>
using namespace std;
int main()
{
int a=5, b=10, c=15;
int *arr[]= {&a, &b, &c};
cout<<arr[1];
return 0;
}
A 5
B 10
C 15
D it will return some random number
Answer D
Marks 1
Unit III
Id 105
Question The correct statement for a function that takes pointer to a float , a pointer to a ponter to a
char &return a pointer to a integer is
A int**fun(float**, char**)
B int *fun(float*, char*)
C int ***fun(float*, char**)
D int ***fun(*float, **char)
Answer C
Marks 1
Unit III
Id 106
Question What is size of generic pointer in C++(in 32-bit platform)?
A 2
B 4
C 8
D 0
Answer B
Marks 1
Unit 3
Id 107
Question What is the output of this program?
#include<iostream>
using namespace std;
int main()
{
int a[2][4]={3,6,9,12,15,18,21,24};
cout<<*(a[1] + 2)<<*(*(a+1)+2)<<2[1[a]];
return 0;
}
A 15 18 21
B 21 21 21
C 24 24 24
D compile time error
Answer B
Marks 1
Unit 3Id 108
Question Void pointer can point to which type of objects?
A Int
B Float
C Double
D all of above
Answer D
Marks 1
Unit 3
Id 109
Question When does the void pointer can be dereferenced?
A when it doesn’t point to any value
B when it cast to another type of object
C using delete keyword
D none of above
Answer B
Marks 1
Unit 3
Id 110
Question The pointer can point to any variable that is not declared with which of these?
A Const
B Volatile
C both a &b
D Static
Answer C
Marks 1
Unit 3
Id 111
Question A void pointer can not point to which of these?
A methods in C++
B class member in c++
C both a &b
D none of these
Answer B
Marks 1
Unit 3
Id 112
Question what we can‟t do on void pointer?
A pointer arithmetic
B pointer functions
C both a &b
D none of these
Answer A
Marks 1
Unit 3
Id 113
Question To which does the function pointer point to?
A Variable
B Constants
C Function
D absolute variables
Answer C
Marks 1
Unit 3
Id 114
Question What we will not do with function pointers?
A Allocation of memory
B De-allocation of memory
C both a &b
D none of these
Answer C
Marks 1
Unit 3
Id 115
Question Which of the following can be passed in function pointers?
A Variables
B data types
C Functions
D none of these
Answer C
Marks 1
Unit 3
Id 116
Question Which operators are used in free store?
A New
B Delete
C both a &b
D none of these
Answer C
Marks 1
Unit 3
Id 117
Question What type of class member is operator new?
A Static
B Dynamic
C Const
D Smart
Answer A
Marks 1
Unit 3
Id 118
Question linked lists are not suitable to for the implementation of_______________
A insertion sort
B radix sort
C polynomial manipulation
D binary search
Answer D
Marks 1
Unit 3
Id 119
Question Run time polymorphism can be achieved with____________
A virtual base class
B container class
C virtual function
D a &c
Answer C
Marks 1
Unit 3
Id 120
Question When a virtual function is redefine by the derived class, it is called______
A Overloading
B Overriding
C Rewriting
D all of the above
Answer A
Marks 1
Unit 3
Id 121
Question An abstract class is useful when
A no classes should be derived from it.
B there are multiple paths from one derived class to another.
C no objects should be instantiated from it.
D you want to defer the declaration of the class.
Answer C
Marks 1
Unit III
Id 122
Question Use of virtual functions implies
A Overloading
B Overriding
C Static binding
D Dynamic binding
Answer D
Marks 1
Unit II
IId 123
Question Which of the following type casts will convert an Integer variable named amount to a
Double type?
A (double) amount
B ( int to double) amount
C int to double(amount)
D int (amount) to double
Answer A
Marks 1
Unit III
Id 124
Question Pure virtual functions
A Have to be redefined in the inherited class
B Cannot have public access specification
C Are mandatory for a virtual class
D None of the above
Answer A
Marks 1
Unit III
Id 125
Question A friend function to a class, C cannot access
A Private data members and member functions
B Public data members and member functions
C Protected data members and member functions
D The data members of the derived class of C
Answer D
Marks 1
Unit III
Id 126
Question The function whose prototype is void getData(Item *thing); receives
A a pointer to a structure
B a reference to a structure
C a copy of a structure
D None
Answer A
Marks 1
Unit III
Id 127
Question The keyword friend does not appear in
A The class allowing access to another class
B The class desiring access to another class
C The private section of a class
D The public section of a class
Answer C
Marks 1
Unit III
Id 128
Question 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 a b c
B “abc”
C abc
D „abc‟
Answer C
Marks 1
Unit III
Id 129
Question Predict output of the following program
#include<iostream>
using namespace std;
class Base
{
public:
virtual void show() { cout<<” In Base n”; }
};
class Derived: public Base
{
public:
void show() { cout<<“In Derived n”; }
};
int main(void)
{
Base *bp = new Derived;
bp->show();
Base &br = *bp;
br.show();
return 0;
}
A In Base
In Base
B In Base
In Derived
C In Derived
In Derived
D In Derived
In Base
Answer C
Marks 2
Unit III
Id 130
Question Output of following program
#include<iostream>
using namespace std;
class Base
{
public:
virtual void show() { cout<<” In Base n”; }
};
class Derived: public Base
{
public:
void show() { cout<<“In Derived n”; }
};
int main(void)
{
Base *bp, b;
Derived d;
bp = &d;
bp->show();
bp = &b;
bp->show();
return 0;
}
A In Base
In Base
B In Base
In Derived
C In Derived
In Derived
D In Derived
In Base
Answer D
Marks 2
Unit III
Id 131
Question Which of the following is true about pure virtual functions?
1) Their implementation is not known in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract class and an
instance of this class cannot be created.
A Only 1
B Only 2
C Both
D None
Answer C
Marks 1
Unit III
Id 132
Question #include<iostream>
using namespace std;
class Base
{
public:
virtual void show() = 0;
};
int main(void)
{
Base b;
Base *bp;
return 0;
}
A There are compiler errors in lines “Base b;” and “Base bp;”
B There is compiler error in line “Base b;”
C There is compiler error in line “Base bp;”
D No compilation error
Answer B
Marks 2
Unit III
Id 133
Question Predict the output of following program.
#include<iostream>
using namespace std;
class Base
{
public:
virtual void show() = 0;
};
class Derived : public Base { };
int main(void)
{
Derived q;
return 0;
}
A Compiler Error: there cannot be an empty derived class
B Compiler Error: Derived is abstract
C No compiler Error
D None
Answer B
Marks 2
Unit III
Id 134
Question #include<iostream>
using namespace std;
class Base
{
public:
virtual void show() = 0;
};
class Derived: public Base
{
public:
void show() { cout<<“In Derived n”; }
};
int main(void)
{
Derived d;
Base &br = d;
br.show();
return 0;
}
A Compiler Error in line “Base &br = d;”
B Empty output
C In derived
D None
Answer C
Marks 2
Unit III
Id 135
Question Can a constructor be virtual? Will the following program compile?
#include <iostream>
using namespace std;
class Base {
public:
virtual Base() {}
};
int main() {
return 0;
}
A Yes
B No
C
D
Answer B
Marks 2
Unit II
IId 136
Question Can a destructor be virtual? Will the following program compile?
#include <iostream>
using namespace std;
class Base {
public:
virtual ~Base() {}
};
int main() {
return 0;
}
A Yes
B No
C
D
Answer A
Marks 2
Unit III
Id 137
Question Predict the output
#include<iostream>
using namespace std;
class Base {
public:
Base() { cout<<“Constructor: Base”<<endl; }
virtual ~Base() { cout<<“Destructor : Base”<<endl; }
};
class Derived: public Base {
public:
Derived() { cout<<“Constructor: Derived”<<endl; }
~Derived() { cout<<“Destructor : Derived”<<endl; }
};
int main() {
Base *Var = new Derived();
delete Var;
return 0;
}
A Constructor: Base
Constructor: Derived
Destructor : Derived
Destructor : Base
B Constructor: Base
Constructor: Derived
Destructor : Base
C Constructor: Base
Constructor: Derived
Destructor : Derived
D Constructor: Derived
Destructor : Derived
Answer A
Marks 2
Unit III
Id 138
Question Can static functions be virtual? Will the following program compile?
#include<iostream>
using namespace std;
class Test
{
public:
virtual static void fun() { }
};
A Yes
B No
C
D
Answer B
Marks 2
Unit III
Id 139
Question Predict the output of following C++ program. Assume that there is no alignment and a
typical implementation of virtual functions is done by the compiler.
#include <iostream>
using namespace std;
class A
{
public:
virtual void fun();
};
class B
{
public:
void fun();
};
int main()
{
int a = sizeof(A), b = sizeof(B);
if (a == b) cout <<“a == b”;
else if (a >b) cout <<“a >b”;
else cout <<“a <b”;
return 0;
}
A a>b
B a==b
C a<b
D Compile time error
Answer A
Marks 2
Unit III
Id 140
Question #include <iostream>
using namespace std;
class A
{
public:
virtual void fun() { cout <<“A::fun() “; }
};
class B: public A
{
public:
void fun() { cout <<“B::fun() “; }
};
class C: public B
{
public:
void fun() { cout <<“C::fun() “; }
};
int main()
{
B *bp = new C;
bp->fun();
return 0;
}
A a::fun()
B b::fun()
C c::fun()
D None
Answer C
Marks 2
Unit III
Id 141
Question Predict the output of following C++ program
#include<iostream>using namespace std;
class Base
{
public:
virtual void show() { cout<<” In Base n”; }
};
class Derived: public Base
{
public:
void show() { cout<<“In Derived n”; }
};
int main(void)
{
Base *bp = new Derived;
bp->Base::show(); // Note the use of scope resolution here
return 0;
}
A In Base
B In derived
C Compile time error
D Runtime error
Answer A
Marks 2
Unit III
Id 142
Question Which of the following is true about this pointer?
A It is passed as a hidden argument to all function calls
B It is passed as a hidden argument to all non-static function calls
C It is passed as a hidden argument to all static functionsD None
Answer B
Marks 1
Unit III
Id 143
Question What is the use of this pointer?
A When local variable‟s name is same as member‟s name, we can access member using this
pointer.
B To return reference to the calling object
C Can be used for chained function calls on an objectD All
Answer D
Marks 1
Unit III
Id 144
Question Predict the output of following C++ program.
#include<iostream>
using namespace std;
class Test
{
private:
int x;public:
Test(int x = 0) { this->x = x; }
void change(Test *t) { this = t; }
void print() { cout <<“x = ” <<x <<endl; }
};
int main()
{
Test obj(5);
Test *ptr = new Test (10);
obj.change(ptr);
obj.print();
return 0;
}
A X=5
B X=10
C Compile time error
D Run time error
Answer C
Marks 2
Unit III
Id 145
Question A static data member is given a value
A Within the class definition
B Outside the class definition
C When the program is exeuted
D Never
Answer D
Marks 1
Unit III
Id 146
Question A function call mechanism that passes arguments to a function by passing a copy of the
values of the arguments is __________
A Call by name
B Call by value
C Call by reference
D Call by value result
Answer B
Marks 1
Unit III
Id 147
Question A ……………. takes a reference to an object of the same class as itself as an argument.
A Reference constructor
B Copy Constructor
C Self Constructor
D None of the above
Answer B
Marks 1
Unit III
Id 148
Question Automatic initialization of object is carried out using a special member function called
A Friend
B Casting
C Reference Parameter
D Constructor
Answer D
Marks 1
Unit III
Id 149
Question Which of the following condition is true for an object used as a function argument?
i) A copy of the entire objects is passed to the function.
ii) Only the address of the object is transferred to the function.
A Only i
B Only ii
C Both I &ii
D None
Answer C
Marks 1
Unit III
Id 150
Question Which of the following parameter passing mechanism is/are supported by C++ not C
A Pass by value
B Pass by reference
C Pass by value result
D All of above
Answer B
Marks 1
Unit II