How can you make sure that your singleton class will always return single instance in multi-threaded environment?

1031

---

Difference between static synchronization vs. Instance synchronization?

1129

---

Explain numeric promotion?

1107

---

What is contract between hashcode and equal method?

1053

---

If you do not want your class to be inherited by any other class. What would you do?

1007

---

What is java’s garbage collected heap?

982

---

What is re-factoring in software?

1052

---

What is static synchronization?

1106

---

What is annotation in java?

1053

---

What are static methods?

1054

---

What is a map? What are the implementations of map?

1095

---

Which package is imported by default?

1082

---

What are the restrictions imposed on method overriding?

1008

---

What is hash code collision?

1051

---

What do you mean by order of precedence and associativity?

950

---