Java Core Class (Type, File)

7. Encapsulation

1. What is encapsulation?

2. Features of encapsulation.

3. Advantages of encapsulation.

4. Support encapsulation in java, how to achieve, benefits of using.

5. Difference between inheritance and encapsulation.

8. Interface

1. What is interface.

2. Interface in Java

3. Multiple inheritance and interface.

4. Possible content of an interface in java.

5. Object class and interfaces.

6. Marker or tagged interfaces.

7. Differences between interface and abstract class.

8. Interface in java 1.8 and java 1.9 .: new features (YH)

9. Interface and inner classes.

9. Collections

1. Collections API review, hierarchy, contract of interfaces.

2. Collection related features in Java 8.

3. Collections framework, benefits of usage.

4. Generics in Collections Framework.

5. Benefits of iterator usage. Iterator vs Listiterator. Fail-fast and fail-safe difference.

6. Vector and ArrayList comparison.

7. How HashMap works in java?

8. HashMap and Hashtable comparison.

9. ArrayList vs LinkedList.