C++ interview questions part 55
C++ interview questions part 55
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What is the output of this program?
#include #include using namespace std; int main () { string mys; char mya[20]= "Hello world"; mys = mya; cout << mys << '\n'; return 0; }
Correct Answer is : Both pi & i
2. What is the output of this program?
#include #include #include using namespace std; bool IsOdd (int i) { return (i % 2) == 1; } int main () { vector myvector; for (int i = 1; i < 10; ++i) myvector.push_back(i); vector :: iterator bound; bound = partition (myvector.begin(), myvector.end(), IsOdd); for (vector :: iterator it = myvector.begin(); it != bound; ++it) cout << ' ' << *it; return 0; }
Correct Answer is : 4base and 7derived
3. When does the next sequence point start?
Correct Answer is : object is NULL
4. What is string objects in C++?
Correct Answer is : Both Class C & A
5. What is Character-Array?
Correct Answer is : Used to hold the type information returned by the typeid operator
6. Pick the incorrect statement about Character-Array.
Correct Answer is : Compile-time construct
7. Pick the correct statement about string objects in C++.
Correct Answer is : Template class sequence container, alternative for C-like arrays
8. What is the output of the following C++ code?
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
string str;
cin>>str;
cout<
Correct Answer is : Sequence Container arrays know (somehow stores within) its size whereas C-like arrays do not
Correct Answer is : Sequence Container arrays know (somehow stores within) its size whereas C-like arrays do not
9. What is the output of the following C++ code?
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
char str[] = "Hello World";
cout<
Correct Answer is : All of the mentioned
Correct Answer is : All of the mentioned
10. What is the output of the following C++ code?
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
char str[10];
cin>>str;
cout<
Correct Answer is : both at() and get()
Correct Answer is : both at() and get()
11. What is the output of the following C++ code if the string entered by the user is “Hello World”?
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
string str;
cin>>str;
cout<
Correct Answer is : 3
Correct Answer is : 3
12. Which header file is used to include the string object functions in C++?
Correct Answer is :
13. What is the output of the following C++ code?
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
char s1[6] = "Hello";
char s2[6] = "World";
char s3[12] = s1 + " " + s2;
cout<
Correct Answer is : array arr;
Correct Answer is : array arr;
14. Which of the following is correct way of concatenating two string objects in C++? way 1: string s1 = "hello"; string s2 = "world"; string s3 = s1 + s2; way 2: string s1 = "hello"; string s2 = "world"; string s3 = s1.append(s2); way 3: string s1 = "hello"; string s2 = "world"; string s3 = strcat(s1,s2);
Correct Answer is : get<0>(Arr)
15. Which of the following is not a modifier function in string class?
Correct Answer is :
16. Which function is used to get the length of a string object?
Correct Answer is : all of the mentioned
17. What is the identifier given to string class to declare string objects?
Correct Answer is : front()
18. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
const char *a = "Hello\0World";
cout<
Correct Answer is : back()
Correct Answer is : back()
19. What is the output of the following C++ code?
#include
#include
#include
using namespace std;
int main(int argc, char const *argv[])
{
string s("a");
cout<
Correct Answer is : both size() and max_size()
Correct Answer is : both size() and max_size()
20. Which is the correct way of concatenating a character at the end of a string object? way 1: string s; s = s + 'a'; way 2: string s; s.push_back('a');
Correct Answer is : Swaps two arrays
