What is difference between @Component and @Service?
Java Software Engineer Interview Questions
3,070 java software engineer interview questions shared by candidates
core java, advance java questions, sql , springboot, microservices, jdbc
Write inner SQL query (He didn't provide scenario/tables).
How HashMap works? Sub Question: What is hash collision and how to resolve it?
What is the factory pattern and builder pattern? When would you use 1 over the other?
Core Java & Advanced Java Questions
Segregating a list of Strings on the basis of anagrams. (Leetcode)
Are the brackets in the equation balanced. g (3+4)}.... false {(3+6) - (5*7)}...true
What is the skill that I am most comfortable to work?
Mostly core Java and SQL. Collections Hierarchy Collections.synchronizedCollection(Collection ) HashMap versus Hashtable Equals and hashCode ArrayList versus vector ArrayList verus LinkedList Treemap versus treeset Iterators Concurrent Hashmap Executor Pool Thread framework. Hashmap internals. Why doesn't hashtable allowe null key? BlockingQueue Reentrant lock Read write lock Deadlock program. How to avoid deadlock Wait, notify program Wait versus sleep,Wait versus yield InteruptedException Illegal monitor exception Exceptions thrown by threads. Why are strings immutable Abstract class versus interace OOPS Overriding versus overloading Exception hierarchy User defined exception Class.forname Reflection Garbage collection. When is it called. PermGen EdenSpace Static Final Comparator, comparable. Array.sort Colelctions.sort Joins SQL functions, like date, char String builder versus String buffer Singleton Factory Abstract factory Observer Composite JSP architecture
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