C++ interview questions part 39
C++ interview questions part 39
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. In case of non-static member functions how many maximum object arguments a unary operator overloaded function can take?
Correct Answer is : x = x & (-x)
2. In case of non-static member functions how many maximum object arguments a binary operator overloaded function can take?
Correct Answer is : octal, decimal, character, hexadecimal
3. In the case of friend operator overloaded functions how many maximum object arguments a unary operator overloaded function can take?
Correct Answer is : ANDing integer ‘a’ with ‘true’ :8
4. In the case of friend operator overloaded functions how many maximum object arguments a binary operator overloaded function can take?
Correct Answer is : -1 1
5. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
static int a;
public:
void show()
{
a++;
cout<<"a: "<
Correct Answer is : Compiler error may be possible
Correct Answer is : Compiler error may be possible
6. What is a binary operator?
Correct Answer is : STL component used to point a memory address of a container
7. Which is the correct example of a binary operator?
Correct Answer is : advance()
8. Which is the correct example of a unary operator?
Correct Answer is : 3
9. Which is called ternary operator?
Correct Answer is : Error
10. What is the output of the following C++ code?
#include
#include
using namespace std;
class complex
{
int i;
int j;
public:
complex(int a, int b)
{
i = a;
j = b;
}
complex operator+(complex c)
{
complex temp;
temp.i = this->i + c.i;
temp.j = this->j + c.j;
return temp;
}
void show(){
cout<<"Complex Number: "<
Correct Answer is : 4
Correct Answer is : 4
11. What is the output of the following C++ code?
#include
#include
using namespace std;
class complex
{
int i;
int j;
public:
complex(){}
complex(int a, int b)
{
i = a;
j = b;
}
complex operator+(complex c)
{
complex temp;
temp.i = this->i + c.i;
temp.j = this->j + c.j;
return temp;
}
void show(){
cout<<"Complex Number: "<
Correct Answer is : 5
Correct Answer is : 5
12. What is the output of the following C++ code?
#include
#include
using namespace std;
class complex
{
int i;
int j;
public:
complex(){}
complex(int a, int b)
{
i = a;
j = b;
}
complex operator+(complex c)
{
complex temp;
temp.i = this->i + c.i;
temp.j = this->j + c.j;
return temp;
}
void operator+(complex c)
{
complex temp;
temp.i = this->i + c.i;
temp.j = this->j + c.j;
temp.show_poss();
}
void show(){
cout<<"Complex Number: "<
Correct Answer is : Input iterator moves sequentially forward
Correct Answer is : Input iterator moves sequentially forward
13. Given the following C++ code. How would you define the < operator for Box class so that when boxes b1 and b2 are compared in if block the program gives correct result?
#include
#include
using namespace std;
class Box
{
int capacity;
public:
Box(){}
Box(double capacity){
this->capacity = capacity;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
if(b1 < b2){
cout<<"Box 2 has large capacity.";
}
else{
cout<<"Box 1 has large capacity.";
}
return 0;
}
Correct Answer is : No value can be assigned to the location pointed by Input Iterator
14. Which is the correct statement about operator overloading?
Correct Answer is : All of the mentioned
15. Pick the incorrect statements out of the following.
Correct Answer is : Output Iterators are used for assigning
16. What is the output of the following C++ code?
#include
#include
using namespace std;
class Box
{
int capacity;
Box(){}
Box(double capacity){
this->capacity = capacity;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
return 0;
}
Correct Answer is : Output Iterator
17. What is the output of the following C++ code?
#include
#include
using namespace std;
class Box{
int capacity;
bool operator<(Box b){
return this->capacity < b.capacity ? true : false;
}
public:
Box(){}
Box(double capacity){
this->capacity = capacity;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
if(b1 < b2){
cout<<"Box 2 has large capacity.";
}
else{
cout<<"Box 1 has large capacity.";
}
return 0;
}
Correct Answer is : i only
18. Which operator should be overloaded in the following code to make the program error free?
#include
#include
using namespace std;
class Box{
int capacity;
public:
Box(){}
Box(double capacity){
this->capacity = capacity;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
if(b1 == b2){
cout<<"Equal";
}
else{
cout<<"Not Equal";
}
return 0;
}
Correct Answer is : Can be used as both accessing and assigning iterator
19. Give the function prototype of the operator function which we need to define in this program so that the program has no errors.
#include
#include
using namespace std;
class Box{
int capacity;
public:
Box(){}
Box(double capacity){
this->capacity = capacity;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
if(b1 == b2){
cout<<"Equal";
}
else{
cout<<"Not Equal";
}
return 0;
}
Correct Answer is : Forward Iterator that can be used in both directions
20. What is the output of the following C++ code?
#include
#include
using namespace std;
class Box{
int capacity;
public:
Box(){}
Box(double capacity){
this->capacity = capacity;
}
bool operator<(Box b){
return b.capacity < this->capacity? true : false;
}
};
int main(int argc, char const *argv[])
{
Box b1(10);
Box b2 = Box(14);
if(b1 < b2){
cout<<"B1's capacity is small";
}
else{
cout<<"B2's capacity is small";
}
return 0;
}
Correct Answer is : Iterators that can be used to access elements at an arbitrary offset position
