Good Interview Question

What is Thread-Safe?
Is Jsp Thread-safe?
Is Struts Action Thread-safe?
Comparison between struts2.x vs struts1.x
Comparison between spring vs struts1.x
Struts1.x validator?
Struts2.x validator?
EJB On Tomcat?
How Many Jdbc Driver Type?
What Jdbc Driver Type 4?
Why Implement Serializable?
Quartz?
Ant?
Comparison Between Jdk 1.4 vs jdk 1.5