Siemens Java Developer interview questions

1st there will be a machine coding round from hacker rank. Total 6 questions 2 coding questions. 4 mcq. 2 coding questions I faced are ip address validation from hacker rank. 2 nd one given two strings cancat two strings in this manner s1=abc s2=mnva means output should be ambncva If we clear 1st machine round. Then there will be two technical rounds followed by HR. All the best.