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Question: 1

How many loops are there in C++ 98?

(A) 2
(B) 3
(C) 4
(D) 1

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Question: 2

What is the output of below program?

int main()
{
 if(0)
 {
    cout<<"Hi";
 }
 else
 {
    cout<<"Bye";
 }
return 0;
}

(A) Hi
(B) Bye
(C) HiBye
(D) Compilation Error

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Question: 3

What following operator is called 
?:

(A) Scope Resolution Operator
(B) Conditional Operator
(C) Ternary Operator
(D) if else o/p

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Question: 4

What is size of int datatype in cpp?

(A) 2 Bytes
(B) 4 Bytes
(C) 1 Byte
(D) Depends on Compiler

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Question: 5

Which operator can not be overloaded?

(A) +
(B) -
(C) *
(D) ::

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Question: 6

Which operator has more precedance  in below list?

(A) +
(B) -
(C) ++
(D) *

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Question: 7

What should be the output of below prpgram?

int main()
{
int a=10; cout<<a++;
return 0;
}

(A) 11
(B) 10
(C) Error
(D) 0

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Question: 8

Can we typecast void into int?

(A) Yes
(B) No
(C) Undefined
(D) Depends on Compiler

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Question: 9

What is currect syntax of for loop?

(A) for(initialization;condition; increment/decrement)
(B) for(increment/decrement; initialization; condition)
(C) for(initialization, condition, increment/decrement
(D) None of These

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Question: 10

#include<iostream.h>
void Execute(int &x, int y = 200)
{
 int TEMP = x + y;
 x+= TEMP;
 if(y!=200)
     cout<<TEMP<<x<<y"--";
}

int main()
{
 int A=50, B=20;
 cout<<A<<B<<"--";
 Execute(A,B);
 cout<<A<<B<<"--";
 return 0;
}

(A) 5020--5020--
(B) 5020--7012020--12020--
(C) 5020--70120200--5020
(D) 5020--7050200--5020--

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Question: 11

Can we overload functions in C++?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

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Question: 12

How many times CppBuzz.com is printed?

int main()
{
    int i=0;
    lbl:
    cout<<"CppBuzz.com";
    i++;
    if(i<5)
    {
	goto lbl;
    }
return 0;

}

(A) Error
(B) 5 times
(C) 4 times
(D) 6 times

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Question: 13

What is output of below program?
int main()
{
  const int a=10;
  a++;
  cout<<a;
return 0;

}

(A) 10
(B) 11
(C) Compilation Error
(D) Linking Error

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Question: 14

How to access and edit data in data file handling using structures

(A) read()
(B) write()
(C) both A and B
(D) without read()

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Question: 15

Which operator has highest precedence in * / % ?

(A) *
(B) /
(C) %
(D) all have same precedence

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Question: 16

Which operator has highest precedence?

(A) ()
(B) =
(C) *
(D) ++

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Question: 17

What ise value of a in below program?

void main()
{
 int a, b=20;
 a = 90/b;
}

(A) 4.5
(B) 4.0
(C) 4
(D) Compilation Error

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Question: 18

class base
{
public:
       base()
       {          
           cout<<"BCon";
       }
       ~base()
       {
	   cout<<"BDest ";
       }
};
class derived: public base
{
public:
       derived()
       {     cout<<"DCon ";
       }
       ~derived()
       {     cout<<"DDest ";
       }
};

int main()
{
derived object;
return 0; 
}

(A) Dcon DDest
(B) Dcon DDest BCon BDest
(C) BCon DCon DDest BDest
(D) BCon DCon BDes DDest

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Question: 19

What is the output of below program?

void main()
{
int a = 10;
cout<<a++;

}

(A) 10
(B) 11
(C) 12
(D) Not defined

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Question: 20

What is the full form of oop

(A) Object oriented programming
(B) Oriented object programming
(C) Office oriented programming
(D) office objective programming

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Question: 21

What is output of below program?

int main()
{
  int a=10;
  int b,c;
  b = a++;
  c = a;
  cout<<a<<b<<c;
  return 0;
}

(A) 111011
(B) 111111
(C) 101011
(D) 101010

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Question: 22

Can a for loop contain another for loop?

(A) No
(B) Yes
(C) Compilation Error
(D) Runtime Error

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Question: 23

Can a Structure contain pointer to itself?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

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Question: 24

What is size of void in bytes?

(A) 1
(B) 2
(C) 4
(D) 0

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Question: 25

Can any function call itself?

(A) Yes
(B) No
(C) Compilation Error
(D) Runtime Error

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Question: 26

What should be the output of below program?

void main()
{
    cout<<"CppBuzz";;;;;
}

(A) Compilation Error
(B) Runtime Error
(C) CppBuzz
(D) CppBuzz;;;;

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Question: 27

What should be the output?

int main() {
    int new = -10;
    cout<<"new is: "<<new;
    return 0;
}

(A) new is: -10
(B) new is: 10
(C) Compilation Error
(D) new is: 0

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Question: 28

What should be the output of below program?

void main()
{
    int a = 1;
    switch(a)
    {
        case 1: cout<<"One";
        case 2: cout<<"Two";
        case 3: cout<<"Three";
        default: cout<<"Default";
    }

}

(A) One
(B) Compilation Error
(C) Default
(D) OneTwoThree

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Question: 29

What is size of void in C++?

(A) 2 Bytes
(B) 4 Bytes
(C) Undefined
(D) 0

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Question: 30

C++ is superset of which langauge?

(A) BASIC
(B) VB
(C) PASCAL
(D) C

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Question: 31

class Mycpp
{
    int Mycpp()
    {
       cout<<"Constructor";
       return 0;
     }
};

void main()
{
    Mycpp obj;
}

(A) Constructor
(B) 0
(C) Compilation Error
(D) Runtime Error

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Question: 32

class Mycpp
{
    
};

int main()
{
    Mycpp obj;
    return 0;
}

(A) Compilation Error - Constructor Missing
(B) Nothing would be printed
(C) Undefined
(D) In constructor

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Question: 33

#include <iostream>
using namespace std;

class X
{
public: X()
        { cout<<"X"; }
        ~X()
        { cout<<"~X"; }
};

class Y : public X
{
public: Y()
        { cout<<"Y"; }
        ~Y()
        { cout<<"~Y"; }
};

int main()
{
    Y obj;
    return 0;
}

(A) XY~X~Y
(B) XY~Y~X
(C) X~XY~Y
(D) X~X~YY

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Question: 34

#include<iostream>
using namespace std;

int main()
{

cout<<-1-1-1;

return 0;
}

(A) Compilation Error
(B) 0
(C) 3
(D) -3

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Question: 35

When Virtual Table is created?

(A) Every Class has VTable
(B) Class inherited from other Class
(C) When a Class Overrides the function of Base class
(D) Class has atleast one Virtual Function

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Question: 36

How many object can be created of a Class in C++?

(A) 1
(B) 5
(C) There is no limit
(D) 256

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Question: 37

What is abstract class?

(A) A class with abstract keyword
(B) A class with no functions in it
(C) A class with atleast one pure virtual function
(D) Empty Class

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Question: 38

What is the size of empty class?

(A) 0
(B) 1
(C) 2
(D) 4

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Question: 39

Can a class contain another class in it.

(A) Yes
(B) No

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Question: 40

Can we assign null to void pointer?

(A) No
(B) Yes

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Question: 41

Can we create our own workspace?

(A) Yes
(B) No

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Question: 42

When can we have two classes with same name?

(A) We cant have
(B) In different work space
(C) Can have but in different file
(D) We can have in any scenario

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Question: 43

Can we create array of reference?

(A) Yes
(B) No

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Question: 44

Exceptions are Caught at ?

(A) Compilation Time
(B) Run Time
(C) Linking Time
(D) No

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Question: 45

Which of the following is Memory Leak detection tool?

(A) GC++
(B) KDevelop
(C) GIT
(D) Valgrind

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Question: 46

Is const better than #define?

(A) Yes
(B) No

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Question: 47

Is it good idea to return an address or a reference of a local variable?

(A) Yes
(B) No

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Question: 48

How to stop Name Mangling in C++?

(A) It is not possible
(B) It is possible only with C code
(C) By using extern "C" keyword
(D) By Converting C++ code to C

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Question: 49

Can we create object of Abstract class?

(A) Yes
(B) No

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Question: 50

Is there any difference in below two statements?

int a = 10;
int a(10);

(A) Yes
(B) No

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Question: 51

Can we have Constructor in Abstract class?

(A) Yes
(B) No

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Question: 52

Can we reference a pointer

(A) Yes
(B) No

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Question: 53

Can we create pointer to Abstract class?

(A) Yes
(B) No

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Question: 54

Can we create Nested classes in C++?

(A) Yes
(B) No

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Question: 55

Can we reinitialize reference variable?

(A) Yes
(B) No

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Question: 56

Can we overload Constructor?

(A) Yes
(B) No

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Question: 57

What is VTable?

(A) It contains VPTR
(B) It contains address of Virtual function
(C) It cotains address of Object
(D) None of these

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Question: 58

Can this pointer point to another class?

(A) Yes
(B) No

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Question: 59

How many Access specifier are there in C++?

(A) 1
(B) 2
(C) 3
(D) 4

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Question: 60

What is dangling pointer?

(A) A pointer pointing to NULL
(B) Pointer pointing to memory location which has been freed
(C) Pointer which is pointing to new location
(D) None of these

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Question: 61

Can we have Virtual Destructor ?

(A) Yes
(B) No

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Question: 62

Can we have pure Virtual Destructor?

(A) Yes
(B) No
(C) Depends on compiler

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Question: 63

Can we call virtual function using object?

(A) Yes
(B) No

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Question: 64

Is it mandatory to override virtual function in Derived class?

(A) Yes
(B) No

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Question: 65

If a class(has one virtual function) has 5 Objects then how many Vtable it  will have?

(A) 5
(B) 1
(C) 0
(D) Depends on Compiler

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Question: 66

Can we have Pure Virtual Destructor?

(A) Yes
(B) No

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Question: 67

Can we have constructor as Virtual?

(A) Yes
(B) No

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Question: 68

Is duplicate data allowed in set?

(A) Yes
(B) No

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Question: 69

Which data structure is used by Map?

(A) AVL Tree
(B) Binary Tree
(C) Balance Binary Tree
(D) None of these

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Question: 70

From which STL we can insert/remove data from anywhere?

(A) Vector
(B) Deque
(C) Stack
(D) List

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Question: 71

What is singleton class?

(A) We can create n number of object
(B) We can create max 256 objects
(C) We can create 1 object
(D) We cant create object

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Question: 72

Which one is more faster?
A - #include<iostream.h>
B - #include "iostream.h"

(A) A
(B) B
(C) Both has are same
(D) Depends on Compiler

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Question: 73

What is Self Referencial Structure?

(A) Structure which contains pointers
(B) Structure which has pointer to itself
(C) Structure which contains another structure
(D) None of these

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Practitioner structure[Posted by: Admin | Chicago, USA]

Question: 74

Which operator has more precedence among the folloelwing?

*
++
+
-

(A) *
(B) ++
(C) +
(D) -

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Question: 75

comma(,) is the operator which has least precdence among all operator.

(A) Yes
(B) No

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Question: 76

What should be output of below program if use enter a = 5?

int main()
{
    int a;
    cin>>a;  // user can enter any value
    
	if (++a*5 <= 25)
	{
	    cout<<"Hello";
	}
	else
	{
	    cout<<"Bye";	
	}
}

(A) Hello
(B) Bye
(C) Undefined
(D) Compilation Error

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Question: 77

Find the output of below program:-

int main() 
{
int i = 0, x = 0;

do
{
    if(i % 5 == 0)
    {
       cout<<x;
       x++;
    }

    ++i;
}while(i<10);

cout<<x;

return 0;
}

(A) 01
(B) 012
(C) 0
(D) 0123

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Question: 78

What should be printed on screen?

int main() 
{
int x = 5;

if(x++ == 5)
cout<<"Five"<<endl;
else
if(++x == 6)
cout<<"Six"<<endl;

return 0;
}

(A) FiveSix
(B) Five
(C) Six
(D) None of these

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Practitioner conditional[Posted by: Admin | Chicago, USA]

Question: 79

int main() 
{
int i=0,x=0;

for(i=1;i<10;i*=2)
{
    x++;
    cout<<x;
}
cout<<x;

return 0;
}

(A) 1234567899
(B) 12345678910
(C) 123455
(D) 12344

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Question: 80

How many times 'its a while loop' should \n be printed?

int main()
{
int i = 1 ;
i = i - 1 ;

while(i)
{
    cout<<"its a while loop";
    i++ ;
}

return 0;
}

(A) 1
(B) 2
(C) 0
(D) Infinite Times

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Expert loops[Posted by: Admin | Chicago, USA]

Question: 81

//Assume all headers are included
//What should be printed?

int main()
{
char Text[ ] = "Cpp@Buzz";

for(int I=0; Text[I]!='�';I++)
{
if(!isalpha(Text[I]))
Text[I]='*';
else if(isupper(Text[I]))
Text[I]=Text[I]+1;
else
Text[I] = Text[I+1];
}
cout<<Text;

return 0;
}

(A) *pp@*uzz
(B) CPP@BUZZ
(C) cpp@buzz
(D) Dp@*Czz

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Question: 82

Find output of below program

int main()
{
int c1,c2;
int a = -8;
int b = 3;
c1 = --a + b;
c2 = a-- + b;
cout<<"c1="<<c1<<", "<<"c2="<<c2<<endl;

return 0;
}

(A) c1=-7,c2=-4
(B) c1=-7,c2=-3
(C) c1=-4,c1=b-3
(D) c1=-6,c2=-6

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Question: 83

How many times CppBuzz.com is printed here?

int main()
{

for(int i=0; i< 5; i++);
cout<<"CppBuzz.com";

return 0;
}

(A) 0
(B) 1
(C) 4
(D) 5

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Beginner loops[Posted by: Admin | Chicago, USA]

Question: 84

Find the output of below program.

int main()
{
for(int i=1;i<=2;i++)
{
for(int j=i;j<=2;j++)
cout<<i<<@;
}
}

(A) 1@2@
(B) 1@2@1@
(C) 1@1@2@
(D) 1@2@2@

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Question: 85

Which Exception is thrown when new fails to allocate memory?

(A) std::exception
(B) std::bad_alloc
(C) std::runtime_error
(D) std::out_of_range

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Question: 86

Which exception is thrown when dynamic_cast fails?

(A) std::bad_typeid
(B) std::logic_error
(C) std::runtime_error
(D) std::bad_cast

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Question: 87

Which is the Parent class for all exceptions?

(A) std::bad_exception
(B) std::logic_error
(C) std::exception
(D) std::runtime_error

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Question: 88

What is the extention of the executable file produced after compiling C/C++ code using g++ on Linux?

(A) .exe
(B) .out
(C) .lib
(D) .a

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Practitioner other[Posted by: Admin | Chicago, USA]

Question: 89

Which part of memory is used for the allocation of local variables declared inside any function.

(A) Heap
(B) Stack
(C) Address Space
(D) Depends on Compiler

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Question: 90

Car contains Engine. Which type of relationship is it?

(A) IS-A relation
(B) HAS-A relation
(C) None of these

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Practitioner classesAndobjects[Posted by: Admin | Chicago, USA]

Question: 91

Are both of the preprocessor directives solving same purpose?

#include <iostream.h>

#include "iostream.h"

(A) Yes
(B) No
(C) Depends on compiler
(D) None of these

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Practitioner other[Posted by: Admin | Chicago, USA]

Question: 92

What is the latest version of C++?

(A) C++ 03
(B) C++ 11
(C) C++ 14
(D) C++ 17

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Expert other[Posted by: Admin | Chicago, USA]

Question: 93

ISO/IEC 14882:1998 represents which version of C++?

(A) C++ 03
(B) C++ 98
(C) C++ 0X
(D) C++ 03

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Question: 94

Which of the following is Right Shift operator?

(A) <
(B) <<
(C) ->
(D) >>

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Question: 95

Which of the following is the least safe type casting in C++?

(A) static_cast
(B) const_cast
(C) reinterpret_cast
(D) dynamic_cast

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Question: 96

Which keyword is used to write Assembly code within a C++ program?

(A) ASM
(B) asm
(C) Not possible
(D) Compiler specific

Compiler DiscussOnForum
Practitioner other[Posted by: Admin | Chicago, USA]

Question: 97

int main()
{
    if(-1 == -1){
        cout<<"Hey..";
    }
    else{
        cout<<"CppBuzz.com";
    }

    return 0;
}

(A) Hey..
(B) CppBuzz.com
(C) Compilation Error
(D) None of these

Compiler DiscussOnForum
Practitioner conditional[Posted by: Admin | Chicago, USA]

Question: 98

C++ 17 is also known as ___

(A) C++ 0x
(B) C++ 98
(C) C++ 1z
(D) C++ 11

Compiler DiscussOnForum
Expert cpp17[Posted by: Admin | Chicago, USA]

Question: 99

Which version of C++ introduced keyword - constexpr?

(A) C++0x
(B) C++11
(C) C++1z
(D) C++20

Compiler DiscussOnForum
Expert keyword[Posted by: Admin | Chicago, USA]

Question: 100

Estimated C++ users?

(A) 1 Million +
(B) 2 Million +
(C) 3 Million +
(D) 4 Million +

Compiler DiscussOnForum
Practitioner other[Posted by: Admin | Chicago, USA]

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C++ Objective Questions - 245

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Subjective Questions

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