What is code signing in iOS operating system?

821

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What are layer objects and what do they represent in iOS operating system?

810

---

What is fast enumeration in iOS operating system?

868

---

What is the difference between delegates and notifications in iOS operating system?

842

---

What is dynamic typing in iOS operating system?

838

---

Implement the following methods: retain, release, auto release in iOS operating system?

807

---

What is dynamic in iOS operating system?

992

---

What is atomic and nonatomic in iOS operating system? What is run loop in iOS ?

842

---

What is a struct in iOS operating system?

774

---

Explain the difference between NSOperationQueue concurrent and non-concurrent in iOS operating system?

860

---

Which class will be subclassed in iOS operating system?

809

---

What is view object in iOS operating system?

927

---

Explain the options and bars available in xcode 4.x workspace window in iOS operating system

830

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What is the difference between retain & assign in iOS operating system?

1015

---

What is the difference between NSArray and NSMutableArray in iOS operating system?

814

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