1. What is marker interface?
2. What is serialization?
3. What is externalization?
4. What is class pattern and what tool you use for this?
5. What is xml schema and DTD?
6. Difference between HashMap and LinkedHashMap?
7. How to avoid duplicate entry in arraylist?
8. How to configure four threads among 100 threads?
9. What is single ton and double ton writer the code for it?
10. How to get all the keys from the HashMap?

Question

1. What is marker interface?
2. What is serialization?
3. What is externalization?
4. What is class pattern and what tool you use for this?
5. What is xml schema and DTD?
6. Difference between HashMap and LinkedHashMap?
7. How to avoid duplicate entry in arraylist?
8. How to configure four threads among 100 threads?
9. What is single ton and double ton writer the code for it?
10.         How to get all the keys from the HashMap?

IBM

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