1. Explain how a HashMap.
2. ArrayList vs LinkedList.
3. Synchronized ArrayList vs Vector.
4. 32 bit JVM vs 64 bit JVM.
5. What is JVM, JRE, JDK?
6. Difference between J2SE and J2EE.
7. Explain the Collection hierarchy.
8. Equals and Hashcode methods.
9. Explain Exception hierarchy.
10. Platform Independence of Java.
11. Explain each OOP concept and how it is implemented.
12. Puzzles

Question

1. Explain how a HashMap.
2. ArrayList vs LinkedList.
3. Synchronized ArrayList vs Vector.
4. 32 bit JVM vs 64 bit JVM.
5. What is JVM, JRE, JDK?
6. Difference between J2SE and J2EE.
7. Explain the Collection hierarchy.
8. Equals and Hashcode methods.
9. Explain Exception hierarchy.
10. Platform Independence of Java.
11. Explain each OOP concept and how it is implemented.
12. Puzzles

Calypso Technology

Calypso Technology interview question

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