171/44 © 01 hour 09 ALL 21.

171/44 © 01 hour 09 ALL 21. (C++ Question) Concatenate two strings in C++ Suppose we have the following code (6) int main(){ string s1= "Hello"; string s2 = "World"; e Now we wish to concatenate these two strings. Which of the following is a valid method in C++ for concatenation of these 2 strings? Y Pick ONE option Vv | (eo) Add header #include and add the code: s3 = s1 + s2; | o | ( ; ) Add header #include and add the code: s3 = s1 + s2; | 22 | ( ; ) Add header #include and add the code: s3 = strcat(s1, s2); | 23 | ( ; ) Add header #include and add the code: s3 = strcat(strcat(s1, s2), '\O'); | Clear Selection G Saved! 24 --- [PAGE/IMAGE BREAK] --- d:18/44 © 01hour 07 mins @® G What is the output of the following code: ALL #include (6) using namespace std; class Base * { public: v Base(){ cout<<"Constructing Base\n";} Base(){ cout<<"Destroying Base\n";} 3 v class Derive: public Base { v public: Derive(){ cout<<"Constructing Derive\ } ~Derive(){ cout<<"Destroying Derive\n";} v 3 int main() 23 { Base *basePtr = new Derive(); delete basePtr; 24 return 0; } 25 Pick ONE option --- [PAGE/IMAGE BREAK] --- d:18/44 © 01hour 06 mins @® G class Derive: public Base ALL t public: Derive(){ cout<<"Constructing Derive\ (o) ~Derive(){ cout<<"Destroying Derive\n" 3 int main() { v Base xbasePtr = new Derive(); delete basePtr; return 0; v } v Pick ONE option v | ( ; ) Constructing Base Constructing Derive Destroying Derive | 23 | ( ; ) Constructing Derive Constructing Base Destroying Base | 24 | ( ; ) Constructing Derive Constructing Base Destroying Derive | 25 | (eo) Constructing Base Constructing Derive Destroying Base | ~ Clear Selection --- [PAGE/IMAGE BREAK] --- ALL 24 25 26 class Derived: public Base { 3 public: Derived() { cout << "Constructing Derived\n"; } ~Derived() { cout << "Destructing Derived\n" int main() { Derived *d = new Derived(); Base *b = d; delete b; return 0; d: 19/44 --- [PAGE/IMAGE BREAK] --- ALL 24 25 26 Pick ONE option —, Constructing Derived Constructing Base —\ Constructing Derived Constructing Base Constructing Derived Destructing Base Constructing Base Constructing Derived (eo) Destructing Derived Destructing Base Clear Selection G Saved! 9/44 - A) 01 hour 04 mins - B) G - C) 01 hour 04 mins - D) G