Synechron Software Engineer - Java Developer interview questions

My both rounds were purely technical based on Java, Spring and Hibernate. I have made a list of questions combined which I have been asked there. - There are three methods as below. void method(double d, int i){} void method(int i, double d){} void method(String s1, String s2){} Now, if I call method(0,0). Which method will be called? - Tell me 5 things which I can do to override any method. - Why Strings are immutable? - Write your own immutable class. Then following questions of Deep cloning. - Which are the Wrapper classes in java? - Write a program to reverse a string without using any inbuilt direct function. - Write a program to check numbers till 10 are even or odd using recursion. - Write a program to check given string is Palindrome or not. - Can we write custom exception? If yes, how? - What is contract between equals() and hashcode(). Show me by writing code if you want to override both methods. - I have a class i.e Employee which has two properties id and name. If I want to sort list of employees by their names, what should I do? - Difference between synchronized and Lock. - Difference between synchronizedMap and ConcurrentHashMap. - Producer/Consumer problem using wait and notify - Write a program of Producer/Consumer problem using BlockingQueue. - Spring IOC. What are different ways to achieve Spring IOC? - Difference between BeanFactory and ApplicationContext. - Spring Bean Lifecycle. - How to create RESTful Webservice in Spring. - What to do if I want to get 1st number employee details by hitting URL www.restapi.com/employee/1. Write a controller method for the same. - What are the properties to configure Hibernate? - What is dialect? Why is it used? - How do we write query in Hibernate same as ‘SELECT * FROM EMPLOYEES’ in SQL? - What are alternatives to write queries in Hibernate apart from HQL? - Write configuration for one-to-many relationship between two classes in Hibernate. - Difference between save() and merge(). - List<ParentClass> list = new ArrayList<ChildClass>(); What will happen? - I have one method void method(ArrayList<String> list){}. I’m calling this method by passing raw-type arraylist i.e. method(new ArrayList()). What will happen? - How to convert given String to integer? If I do Integer.parseInt("chintan"); what will happen? - What are the classes you have used for Stream io? - What is the difference between Aggregation and Composition?