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Question: 241

If no handler at any level catches the exception, terminate() will be called and program will terminate

(A) True
(B) False

Compiler
Level: Practitioner Category: exceptions

Question: 242

void some_function() throw ();

How does above function behaves?

(A) Function declaration has error
(B) Behaviour is unknown
(C) Function will throw only standard exceptions defined in <exception>
(D) Function will not throw any exception

Compiler
Level: Practitioner Category: exceptions

Question: 243

In C++ only synchronous exception can be handled

(A) True
(B) False

Compiler
Level: Beginner Category: loops

Question: 244

#include<iostream>
using namespace std;

class Country{
private: int population;

public: void setPopulation(int pop){
             this->population = pop;
          }
         int getPopulation(){
             return this->population;
         }
};

class USA: private Country{

};

int main(){
USA obj;
obj.setPopulation(100);
cout<<obj.getPopulation();
return 0;
}

(A) 100
(B) 0
(C) Compilation Error
(D) Garbage Value is printed

Compiler
Level: Expert Category: inheritance

Question: 245

#include<iostream>
#include<string.h>
using namespace std;

int main()
{
    char one[]="one";
    char two[]="two";
    
    if(one==two){
        cout<<"Equal";
    }
    
    if(strcmp(one, two)==0){
        cout<<"Equal";
    }
    else
    {
        cout<<"NotEqual";
    }

    return 0;
}

(A) Equal
(B) EqualEqual
(C) EqualNotEqual
(D) NotEqual

Compiler
Level: Practitioner Category: conditional

Question: 246

Can we have nested namespaces in C++?

(A) Yes
(B) No

Compiler
Level: Beginner Category: namespace

Question: 247

What should be the location of "using namespace std;" in c++ code?

(A) Before all #include
(B) After #include<iostream>
(C) In middle of #includes
(D) After all #inludes

Compiler
Level: Beginner Category: namespace

Question: 248

What is different between these two lines?
 using namespace std;
 using std::cout;

(A) Using the entire namespace, using only single name from namespace
(B) There is no difference
(C) We can't use only cout from std namespace

Compiler
Level: Beginner Category: namespace

Question: 249

#include<iostream>
#define killer using

killer namespace std;

int main(){
    std::cout<<"CppBuzz.com";
    return 0;
}

(A) Runtime Error
(B) Compilation Erro
(C) Nothing is printed
(D) CppBuzz.com

Compiler
Level: Beginner Category: namespace

Question: 250

How this code would behave?

#include<iostream>
#include<exception>
using namespace std;

class cppbuzz{
    
public:
    cppbuzz(){
        cout<<"constructor.";
        int a; 
        throw a;
    }
    ~cppbuzz(){
        cout<<"destructor.";
    }
};

int main()
{
    cppbuzz *ptr = new cppbuzz();
    delete ptr;

return 0;
}

(A) Program is terminated without printing anything on console
(B) Prints 'constructor' and then it is terminated
(C) constructor.destructor. but ptr is never freed
(D) constructor.destructor. And ptr is freed

Compiler
Level: Practitioner Category: pointers

Question: 251

Select true statement about weak_ptr of C++ 11

(A) C++11's weak_ptrs are used with shared_ptrs.
(B) C++11's weak_ptrs can be used without weak_ptrs
(C) C++11's weak_ptrs are replacement of unique_ptr
(D) C++11's weak_ptrs are used for unique ownership

Compiler
Level: Practitioner Category: pointers

Question: 252

Select the false statement about shared_ptr

(A) We can only use these smart pointers to refer to objects allocated with new
(B) It is recommended that you do not use both 2 shared_ptr and raw pointer on the same object
(C) It can't be copied or assigned to another shared_ptr
(D) We can also reset a shared_ptr by assigning it the value nullptr

Compiler
Level: Practitioner Category: pointers

Question: 253

Is there any error in following code?

unique_ptr<XYZ> ptr1 (new XYZ); 
unique_ptr<XYZ> ptr2(ptr1);

(A) This is valid code snippet with no error
(B) Error: Copy construction is not allowed at line 2
(C) Error: Assignment is not allowed at line 2
(D) Error: Runtime exception

Compiler
Level: Practitioner Category: pointers

Question: 254

How to transfer the ownership of unique_ptrs?

(A) We can't transfer the ownership of unique pointers
(B) It is possible using copy constructor - unique_ptr<Thing> ptr2(ptr1);
(C) ptr2 = std::move(ptr1);
(D) ptr2 = ptr1

Compiler
Level: Expert Category: pointers

Question: 255

Find the output of following code

#include <iostream>

using namespace std;

int main(){
    
    int * ptr = new int;
    cout<<ptr<<" | "<<*ptr;
    return 0;
    
}

(A) Address of memory allocated | Garbage Value
(B) Address of memory allocated | 0
(C) Address of ptr | 0
(D) Address of ptr | Garbage Value

Compiler
Level: Beginner Category: new_delete

Question: 256

How this C++ code behaves?

#include <iostream>

using namespace std;

int main(){
    
    int * ptr = NULL;
    ptr++;
    delete ptr;
    return 0;
}

(A) Program runs without any error
(B) Compilation Error
(C) Runtime error (Segmentation fault)
(D) None of the above

Compiler
Level: Beginner Category: new_delete

Question: 257

Which of the following Exception is thrown by C++ 'new'
when there is no memory available to allocate?

(A) bad_exception
(B) overflow_error
(C) out_of_range
(D) bad_alloc

Compiler
Level: Practitioner Category: new_delete

Question: 258

// find the output of below program if user enters: 2 2 2
#include<iostream>
using namespace std;

class Rectangle
{
protected:
int length,width,area;
public:
void getdata()
{
cout<<"enter data :";
cin>>length>>width;
}
void print()
{
area=length*width;    
cout<<area;

}
};

class cube : public Rectangle
{
int height,volume;
public:
void getdata()
{
cout<<"enter height, length,width : ";
cin>>height>>length>>width;
}
void dprint()
{
volume=length*height*width;    
cout<<volume;
}
};

int main()
{
cube c;
c.getdata();
c.print();
c.dprint();
return 0;
}

(A) 08
(B) 04
(C) 84
(D) 48

Compiler
Level: Practitioner Category: inheritance

Question: 259

//find the output of below c++ program

#include<iostream>
using namespace std;

class base{
    public: 
    void hello(){
        cout<<"base";
    }
};

class derived: private base{
    
};

int main()
{
derived obj;
obj.hello();
return 0;
}

(A) base
(B) Nothing is printed
(C) basebase
(D) None of the Above

Compiler
Level: Practitioner Category: inheritance

Question: 260

#include<iostream>
using namespace std;

class cppbuzz_base{
    public: 
    
    void hello(){
        cout<<"Hello Base ";
    }
};

class derived: public cppbuzz_base{
    public:
    
    void hello(){
        cout<<"Hello Derived ";
    }
    
};

int main()
{
derived obj;
cppbuzz_base baseObj = cppbuzz_base(obj);
baseObj.hello();
return 0;
}

(A) Hello Derived
(B) Hello Base
(C) Hello Derived Hello Base
(D) Hello Base Hello Derived

Compiler
Level: Practitioner Category: typecasting

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