1 What are the object-oriented features 2 String Is the most basic data type? 3 INT and Integer What is the difference between 4 String and StringBuffer? How is the unusual abnormality in the runtime? 6 Some common types, packages, interfaces, please raise 5 7 to say ArrayList, Vector, LinkedList's storage performance and feature 8 design 4 threads, two threads add 1 to j, two other two Thread pair J decreases each time. Write the program. 9. The built-in object and method of JSP. 10. Written communication with the Socket communication requests the customer to return the same data after sending the data. 11 Say the life cycle of the servlet and say the difference between servlet and CGI. 12.EJB is based on which technologies are implemented? And say the difference between SessionBean and EntityBean, the differences of Statefulbean and STATELESSBEAN. 13. EJB includes (sessionbean, entitybean) says their life cycle, how to manage transactions? 14. What is the working mechanism of the data connection pool? 15 Synchronous and asynchronous and different, use them in what circumstances? for example. 16 What are the application servers? 17 What are your collections you know? Main method? 18 Give you: Driver A, Data Source Name B, the user name is C, the password is D, the database table is T. All the data of the table T is retrieved with JDBC. 19. Say how to make a pagination in the JSP page?
Database: 1. Differences between stored procedures and functions 2. What is transaction? When the transaction is completed, you must keep all the data consistently. In the relevant database, all rules must be used to modify the transaction to maintain all data integrity. At the end of the transaction, all internal data structures (such as the B tree index or bidirectional linked list must be 3. the role of the cursor? How do you know that the cursor has arrived at the end? The trigger is divided into an ex-trigger and afterwards, these two triggers have, and distinguish. What is the difference between statement level trigger and row trigger. The prior trigger is running before the trigger event occurs, and after the event is running after the trigger event occurs. Usually the prior trigger can get the event before and the new field value. Statement-level triggers can be executed before or after execution of statements, while the row triggers each row that triggered in the trigger.
Second, JSP 1, at least 7 implied objects and their distinction ** 2, forward, and redirect 3, JSP common instructions three, servlet 1, to call DOGET () and dopost () ? 2, servlet's init () method and service () method distinguish 3, the lifecycle of servlet 4, how realistic servlet single-thread mode 5, Servlet configuration 6, four session tracking technology
