What is the difference between add_action and add_filter in wordpress?

118

---

How do you represent binary and hexadecimal numbers?

484

---

What is serializable?

663

---

Tell me about important protocol being used in objective c?

1

---

Are struts thread safe?

556

---

---

Explain where did you use wf in your last project?

543

---

Can we override constructors?

540

---

What is write ahead log(journaling) in Spark?

244

---

pls someone send me sample question papers along with the key.thanks in advance

1883

---

What are the implications?

1179

---

What is the major difference between Thread.start() & Thread?run() method?

577

---

What can you do on wordpress?

85

---

How to use css selector?

287

---

What is mlib?

186

---

What is ioc?

154

---