what is preferences

1665

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What is the APK format in Android?

1039

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Who calls the main function of you app during the app launch cycle in iOS operating system?

882

---

What is App Bundle in iOS operating system?

906

---

What are all the difference between categories and subclasses in iOS operating system?

765

---

What is an NSOperationQueue and how/would you use it in iOS operating system?

835

---

What is plist file and explain about it is usage in iOS operating system?

797

---

Multitasking support is available from which version in iOS operating system?

921

---

Which app specific objects store the app's content in iOS operating system?

802

---

How can we achieve singleton pattern in iOS?

849

---

What is Delegation in iOS?

807

---

Why do we need to use @Synthesize in iOS operating system?

782

---

Is the delegate for a CAAnimation retained in iOS operating system?

858

---

How to represent layer objects in iOS operating system ?

809

---

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

862

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