7N interview questions

Questionas about my previous experience

What is Union.Explain. I explained correctly. Then they gave a code snippet. And asked for output. I told the correct answer quickly. Then they gave me the following code and asked to print "There are 100 boxes" by the statement cout<< obj1.a; And told that there are some errors in the code, correct that. After discussing with them for about 15 minutes, I understood that they were quite unskilled and have conducted the Interview to clear their concepts. class ABC { public: string x; int y; ABC (string _x, int _y){ x=_x; y=_y } }; class XYZ { string a; } main() { ABC *obj = new ABC("There are _ boxes", 100); XYZ *obj1 ; obj1 = obj; cout<< obj1.a; //This statement should print "There are 100 boxes" }