Is iterator a class or interface? What is its use?

938

---

How many methods are there in the serializable interface?

956

---

How to define an interface?

1001

---

What is the abstract method modifier?

1018

---

What is meant by “abstract interface”?

1024

---

Explain the abstract class modifier?

888

---

How to define an abstract class?

1027

---

Can an interface have an inner class?

1050

---

What is the gang of four design pattern?

1094

---

When should design patterns be used?

1084

---

What are creational design patterns?

1088

---

What is a behavioral design pattern?

1052

---

what is the lazy design pattern?

1057

---

Describe the builder design pattern

1137

---

What are structural design patterns?

1145

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