Etisalat Software Solutions Latest Java Selenium Interview Questions

Etisalat Software Solutions Interview Questions

• if you pass duplicate key to map what will happen?
• Diff b/w abstract class and interface?
• Diff b/w comparator and comparable?
• How to compare two database tables(clue: comparator, compare(),  you have to compare database objects.)?
• How to set the timeout for the browser? (clue: restful client API.)?
• What workflow did you use in your project?
• why java? why not c & c++?
• In the written test they are asking sorting programs(bubble sort, quicksort,…)?
• What is time complexity? if you are going to implement sorting on your own which sorting you prefer? and why?
• What is the use of volatile and synchronized?
• What is serialization? have you implement serialization in your project?
• Programs on io streams?
• why we are using @qualifier?
• Diff b/w BeanFactory and ApplicationContext?
• Explain the IOC container?
• Programs on string manipulations? (they are expecting to solve by using regular expressions).
• How you have implemented polymorphism in your project?
• How you iterate map having key and list<values>?
• Diff b/w Iterator and ListIterator an Enumerator?
• What are all the collections are supporting ListIterator?
• How to make a non-synchronized map and list as synchronized(by using the collection method)?
• What is diff b/w collection and collections?
• Write the JUnit test case for the below scenario. read an array of elements into the list<>.
• What are all the modifiers we can use inside a method? (answer: only final)
• what is diff b/w spring-JDBC and hibernate?
• What are all the drawbacks of JDBC over hibernate?
• what are all the problems with inheritance?
• What is the use of a hibernate session?
• They have given one query in SQL and they are asking corresponding criteria API query?
• why we are using @transient in hibernate?
• what are all the inputs we are giving to SessionFactory?
• what we are writing in the hibernate-mapping file?
• what we are writing in the hibernate-configuration file?
• scenario: in a JSP page with 2 buttons, one for addbook and another is for showListOfBooks(by using spring and hibernate)?
• what is the use of @ComponentScan?
• what is the use of dispatcher servlet?
• what are all the pre-processing tasks done by DispatcherServlet?
• How to render excel and pdf view to the end-user(using poi and Itext API’s)?
• How to validate valid username and password in spring? for validating can I directly interact with dao without service?
• By default, the servlet container will handle multi-threaded applications, then why you are implementing multi-threading in your application?