C++ interview questions part 29
C++ interview questions part 29
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which concept of OOPs is shown by Virtual Functions?
Correct Answer is : ios::in|ios::out
2. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
public:
virtual A(){
cout<<"A's Constructor\n";
}
};
class B: public A
{
public:
A(){
cout<<"Present inside the class B\n";
}
};
int main(int argc, char const *argv[])
{
A a;
return 0;
}
Correct Answer is : tell_p()
3. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
public:
virtual static void show(){
cout<<"class A\n";
}
};
class B: public A
{
public:
static void show(){
cout<<"class B\n";
}
};
int main(int argc, char const *argv[])
{
A *a = new A();
B b;
a = &b;
a->show();
return 0;
}
Correct Answer is : seekg()
4. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
int a;
public:
A(){
a = 0;
}
static void show(){
a++;
cout<
Correct Answer is : ios::beg
Correct Answer is : ios::beg
5. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
int a;
public:
A(){
a = 0;
}
void show(){
a++;
cout<<"a: "<
Correct Answer is : <<
Correct Answer is : <<
6. What is the output of the following C++ code?
#include
#include
using namespace std;
class A
{
int a;
public:
A(){
a = 0;
}
void show(){
a++;
cout<<"a: "<
Correct Answer is : seekg
Correct Answer is : seekg
7. What happens if the following program is compiled?
#include
#include
using namespace std;
class A
{
int a;
public:
A(){
a = 0;
}
void show(){
a++;
cout<<"a: "<
Correct Answer is : 3
Correct Answer is : 3
8. Which operator is used for input stream?
Correct Answer is : Runtime error
9. Where does a cin stops it extraction of data?
Correct Answer is : Returns first 2 letter or number from the entered word
10. Which is used to get the input during runtime?
Correct Answer is : Done
11. How many parameters are there in getline function?
Correct Answer is : short float
12. What can be used to input a string with blank space?
Correct Answer is : 28700
13. When will the cin can start processing of input?
Correct Answer is : -3.4E+38 to +3.4E+38
14. The size_t integer type in C++ is?
Correct Answer is : long double
15. Which of these expressions will return true if the input integer v is a power of two?
Correct Answer is : 123
16. What is the value of the following 8-bit integer after all statements are executed? int x = 1;x = x << 7;x = x >> 7;
Correct Answer is : F or f
17. Which of these expressions will make the rightmost set bit zero in an input integer x?
Correct Answer is : equal
18. Which of these expressions will isolate the rightmost set bit?
Correct Answer is : char < int < double
19. 0946, 786427373824, ‘x’ and 0X2f are _____ _____ ____ and _____ literals respectively.
Correct Answer is : Whitespace
20. What will be the output of this program?
#include using namespace std; int main() { int a = 8; cout << "ANDing integer 'a' with 'true' :" << a && true; return 0; }
Correct Answer is : 4
