What is aggregation and composition ?

1 Answers   Fidelity,

---

What is thread synchronization in java?

0 Answers  

---

What is Co-Variant return type in method overriding?

1 Answers   RBS,

---

why HashTable not allow null key and value

2 Answers   Crimson Logic,

---

Explain which of the following methods releases the lock when yield(), join(),sleep(),wait(),notify(), notifyall() methods are executed?

0 Answers  

---

How many types of parsers are there?

0 Answers  

---

What are the features of junit?

0 Answers  

---

Which list does not allow duplicates in java?

0 Answers  

---

which method is used to know the status of the Thread?

9 Answers   Honeywell,

---

What is nullpointerexception in java?

0 Answers  

---

Can we override private method?

0 Answers  

---

List the interfaces which extends collection interface?

0 Answers  

---