How Crack the top MNC technical round?

Too many assumptions here. What kind of MNC is it? IT or Core engineering, which branch. 

Spend some time describing your question in detail and tell us what you want.

Note: Questions that aren't properly described are deleted from CrazyEngineers. 

Sorry for inconvenience My qualification is B.Tech CSE MNC is related to Core I want to become a Java developer please help sir 

Okay, which company's technical round do you wish to clear? What are the problems you are facing? 

PS: Take a moment, and describe your question in about 100 - 200 words; so that we have a complete idea of what help you want. 

I want clear technical round MNC's like TCS, WIPRO, INFOSYS,TECH MAHINDRA,

I am facing the problem is

 ex: To print the word in clock wise and Anti clock wise direction from specific given character 

String example:- SAMPLE

Clock wise:- M :- MPLESA

Anti Clockwise:- M :- MASELP

Like this type of different problems with solution I need in Java language sir.