Java YXYC Interview

0. Self Introduction

1. What are the deployment methods for Java applications?

2. SQL injection? How to avoid it?

3. What are the methods of SQL optimization?

4. What does the application server know? Tomcat,resin

5, Oracle database optimization?

5, JVM memory management? Http://www.cnblogs.com/dingyingsi/p/3760447.html

6, garbage collection?

   Java's garbage collection mechanism is the ability provided by the Java Virtual machine, Used in   idle time   to   indefinite   way   Dynamic Reclamation      。 Note:   garbage collection reclaims the memory space occupied by objects without any references   instead of the object itself, many companies will ask this question during an interview, 
  70% The answer to those above is that the object is recycled, which is actually incorrect.   System.GC () runtime.getruntime (). GC ()  The  method call above is used to explicitly notify the JVM that a garbage collection can take place, but the actual garbage collection mechanism is not 
 predictable at what point in time it happens, and this is the same as when a preemptive thread is acting. 

7. What's your advantage?

Java YXYC Interview