CitiusTech Interview Question

LinkedList Creation without using any Libarary,Reverser LinkedList without using any library, What is Sstem.out.print what It Do ?,Associacation,aggragation,Bean LifeCycle,what java 7 feature is how you use it, full form of nio(java 7 file feature),after creating .class what jvm do? heap memory regions,time complexity,hot to perform two different operation irrespective of N with same execution time,what springBootApplication annotation do,how to customize bean method?,postproccesorbean?,classloader,How spring read dependecy thoruh classpath (Internally) etc prepare very basic core and internal working