What is nsmanagedobjectcontext? What are the different concurrency types?

811

---

What is thread safe?

826

---

How many types of background modes supported in ios?

782

---

How we can execute some code when app is in background?

823

---

How you can add frameworks in xcode project?

854

---

What is a difference between stack and heap memory?

813

---

What are different instruments xcode supports for app profiling?

957

---

What do you mean by rest?

838

---

What is the difference between strong and retain.

769

---

How to animate view with constraint?

825

---

What is the difference between weak and strong?

903

---

What is the difference between developer and enterprise developer accounts?

766

---

What are various singleton instances provided by frameworks?

885

---

Explain concept of notification center, local and remote notifications.

735

---

Is there an internet explorer for android?

942

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